In the present study, 10 patients with ischemic stroke in the left hemisphere and six healthy controls were subjected to acupuncture at right Waiguan （TE5）. In ischemic stroke subjects, functional MRI showed enhance...In the present study, 10 patients with ischemic stroke in the left hemisphere and six healthy controls were subjected to acupuncture at right Waiguan （TE5）. In ischemic stroke subjects, functional MRI showed enhanced activation in Broadmann areas 5, 6, 7, 18, 19, 24, 32, the hypothalamic inferior lobe, the mamiilary body, and the ventral posterolateral nucleus of the left hemisphere, and Broadmann areas 4, 6, 7, 18, 19 and 32 of the right hemisphere, but attenuated activation of Broadmann area 13, the hypothalamic inferior lobe, the posterior lobe of the tonsil of cerebellum, and the culmen of the anterior lobe of hypophysis, in the left hemisphere and Broadmann area 13 in the right hemisphere. In ischemic stroke subjects, a number of deactivated brain areas were enhanced, including Broadmann areas 6, 11,20, 22, 37, and 47, the culmen of the anterior lobe of hypophysis, alae lingulae cerebella, and the posterior lobe of the tonsil of cerebellum of the left hemisphere, and Broadmann areas 8, 37, 45 and 47, the culmen of the anterior lobe of hypophysis, pars tuberalis adenohypophyseos, inferior border of lentiform nucleus, lateral globus pallidus, inferior temporal gyrus, and the parahippocampal gyrus of the right hemisphere. These subjects also exhibited attenuation of a number of deactivated brain areas, including Broadmann area 7. These data suggest that acupuncture at Waiguan specifically alters brain function in regions associated with sensation, vision, and motion in ischemic stroke patients. By contrast, in normal individuals, acupuncture at Waiguan generally activates brain areas associated with insomnia and other functions.展开更多
Lead exposure induces decreased hippocampal N-methyI-D-aspartic acid （NMDA） receptor gene and protein expressions, which influences the molecular mechanisms of learning and memory. However, lead poisoning-induced di...Lead exposure induces decreased hippocampal N-methyI-D-aspartic acid （NMDA） receptor gene and protein expressions, which influences the molecular mechanisms of learning and memory. However, lead poisoning-induced differences in NMDA subunit expression, and the correlation of lead poisoning with learning and memory, remain poorly understood. The present study measured differences in expression of NMDA receptor subunits NR1, NR2A, and NR2B in memory-related brain regions of rats who underwent different doses of lead exposure. Results demonstrated decreased NR1, NR2A, and NR2B subunit expressions in some memory-related brain areas. The inhibitory effect of 4.8 mmol/L lead exposure on hippocampal NR2B was most significant, although NR2A expression also significantly decreased following 14.4 mmol/L lead exposure. There was no difference in NR1 expression following exposure to 〈 4.8 mmol/L lead, although the inhibitory effect of 19.6 mmol/L lead exposure was strongest for NR1 expression in the hippocampus. Inhibitory avoidance test results revealed that greater concentrations of lead exposure resulted in decreased learning and memory. Therefore, lead toxicity was dependent on NMDA receptor subunit composition, and NR1, NR2A, and NR2B expressions were associated with time and concentration of lead exposure.展开更多
BACKGROUND ： Functional magnetic resonance imaging （fMRI） studies have disclosed the changes of the motor function in the motor cortex of ipsilateral and contralateral hemispheres of tumor, which have special signi...BACKGROUND ： Functional magnetic resonance imaging （fMRI） studies have disclosed the changes of the motor function in the motor cortex of ipsilateral and contralateral hemispheres of tumor, which have special significance for making the surgical planning and most greatly minimizing the postoperative functional damages. OBJECTIVE： To analyze the association between the manifestation characteristics of hand functional area and motor dysfunction using fMRI in patients with space-occupying lesions of tumor in motor cortex. DESIGN ： A case-controlled observation SETTING： Department of Radiology, Second Affiliated Hospital, Shantou University Medical College .PARTICIPANTS： Twenty-three patients （13 males and 10 females） with space-occupying lesions of central sulcus area, aged 21-53 years with a mean age of （47±1） years were selected from the Second Affiliated Hospital of Shantou University Medical College. All the patients were diagnosed by MR scanning as space-occupying lesions of motor area, and pathologically confirmed that the lesions involved central sulcus and central Iobule; Lesions occurred in left and right hemispheres in 13 and 10 cases respectively. The tumor types were astrocytoma （n =8）, metastatic tumours （n =7）, meningiomas （n =5） and oligodendroglioma （n =3）. The muscle strength was normal in 11 cases （grade 5） and obviously decreased in 12 cases （grade 2-3 in 3 cases and grade 4 in 9 cases）; muscle strengths of both upper and lower limbs were decreased in 7 cases, and only that of upper limbs was decreased in 5 cases. Informed consents were obtained from all the subjects. Meanwhile, 9 healthy physical examinees （5 males and 4 females） of 20-56 years old with an average of （34±1） years were taken as controls. All the patients and healthy subjects were right-handed. METHODS： All the enrolled subjects were examined with MR scanning and functional imaging. Twenty cases whose clinical symptoms were mild in the patient group and 9 healthy volunteers adopted simple active finger-tapping movements, and for the 3 cases whose clinical symptoms were severe in the patient group, the simple passive finger-tapping movements were used. The manifestations in the activated brain areas were analyzed in the patients with brain tumor of different muscle strength and the controls. The motor deficit and activation of contralateral primary motor cortex （M1） in simple finger-tapping movements were observed in the patient group. MAIN OUTCOME MEASURES： （1） Brain areas activated by finger-tapping movements in each group： （2） Activated volumes in hemisphere by finger-tapping movements between groups. RESULTS： The contralateral M1 area could not be activated in 1 case in the patient group,, all the other 22 patients and 9 healthy subjects were involved in the analysis of results. （1） In the control group, unilateral finger tapping movement activated the contralateral primary motor cortex （M1）, bilateral SMA and bilateral PMC. The activation volume was the largest in contralateral primary motor cortex （M1）, smaller in the SMA, and the smallest in PMC. The finger tapping movement in healthy subjects could activate contralateral primary motor cortex （M1）, bilateral SMA and bilateral PMC, which had no obvious differences from the manifestations of brain functional area activated by active finger tapping. There was no significant difference in the volume of activated functional areas between right and left hands. In the patient group, the central sulcos around the tumor in the activated M1 area displaced towards dorsal or ventral side, also extended. The distance of displacement in the functional area was determined as compared with the contralateral central sulcus, and the results suggested the M1 displacement, including that there were 10 cases with the M1 displacement larger than 10 mm in the patients with motor deficit, which were obviously more than in those without motor deficit （n =1, P 〈 0.01）, and the activated volume in contralateral M1 area was obvious smaller in the patients with motor deficit than in those without motor deficit （P 〈 0.01）. （2） The M1 activation and changes were observed in contralateral hemisphere in the patient group, and the activated volume was obviously larger than that in the control group （P 〈 0.01）. The activated volumes of M1 and PMC in ipsilateral hemisphere were obviously larger than those in the control group （P 〈 0.05）, but that of SMA had no obvious difference between the two groups （P 〉 0.05）. CONCLUSION： fMRI can be used to observe the activation of the brain motor functional areas of patient with space-occupying lesions in motor area, and evaluate the state of their motor function. The larger the distance of displacement of M1 compressed by tumor, the more obviously the muscle strength decreases in the patients.展开更多
Totally three articles focusing on functional magnetic resonance imaging features of brain function in the activated brain regions of stroke patients undergoing acupuncture on the healthy limbs and healthy controls un...Totally three articles focusing on functional magnetic resonance imaging features of brain function in the activated brain regions of stroke patients undergoing acupuncture on the healthy limbs and healthy controls undergoing acupuncture on the lower extremities are published in three issues. We hope that our readers find these papers useful to their research.展开更多
Changes in activated areas of the brain during ankle active dorsiflexion and ankle active plantar flexion were observed in six healthy subjects using functional magnetic resonance imaging. Excited areas of ankle activ...Changes in activated areas of the brain during ankle active dorsiflexion and ankle active plantar flexion were observed in six healthy subjects using functional magnetic resonance imaging. Excited areas of ankle active dorsiflexion involved the bilateral primary motor area and the primary somatosensory area, as well as the bilateral supplementary sensory area, the primary visual area, the right second visual area, and the vermis of cerebellum. Excited areas of ankle active plantar flexion included the ipsilateral supplementary motor area, the limbic system, and the contralateral corpus striatum. Fine movements of the cerebral cortex control the function of the ankle dorsiflexion to a larger extent than ankle plate flexion, and the function of ankle plate flexion is more controlled by the subcortical area.展开更多
Most studies addressing the specificity of meridians and acupuncture points have focused mainly on the different neural effects of acupuncture at different points in healthy individuals. This study examined the effect...Most studies addressing the specificity of meridians and acupuncture points have focused mainly on the different neural effects of acupuncture at different points in healthy individuals. This study examined the effects of acupuncture on brain function in a pathological context. Sixteen patients with ischemic stroke were randomly assigned to true point group （true acupuncture at right Waiguan （SJ5）） and sham point group （sham acupuncture）. Results of functional magnetic resonance imaging revealed activation in right parietal lobe （Brodmann areas 7 and 19）, the right temporal lobe （Brodmann area 39）, the right limbic lobe （Brodmann area 23） and bilateral oc-cipital lobes （Brodmann area 18）. Furthermore, inhibition of bilateral frontal lobes （Brodmann area 4, 6, and 45）, right parietal lobe （Brodmann areas 1 and 5） and left temporal lobe （Brodmann area 21 ） were observed in the true point group. Activation in the precuneus of right parietal lobe （Brodmann area 7） and inhibition of the left superior frontal gyrus （Brodmann area 10） was observed in the sham group. Compared with sham acupuncture, acupuncture at Waiguan in stroke patients inhibited Brodmann area 5 on the healthy side. Results indicated that the altered specificity of sensation-associated cortex （Brodmann area 5） is possibly associated with a central mechanism of acupuncture at Waiguan for stroke patients.展开更多
Traumatic brain injury（TBI）represents a global pandemic and is currently a leading cause of injury related death worldwide.Unfortunately,those who survive initial injury often suffer devastating functional,social,an...Traumatic brain injury（TBI）represents a global pandemic and is currently a leading cause of injury related death worldwide.Unfortunately,those who survive initial injury often suffer devastating functional,social,and economic consequences.展开更多
OBJECTIVES： An animal experiment clarified that insertion of an orthodontic apparatus activated the trigeminal neurons of the medulla oblongata. Orthodontic tooth movement is known to be associated with the sympathet...OBJECTIVES： An animal experiment clarified that insertion of an orthodontic apparatus activated the trigeminal neurons of the medulla oblongata. Orthodontic tooth movement is known to be associated with the sympathetic nervous system and controlled by the nucleus of the hypothalamus. However, the transmission of both has not been demonstrated in humans. The purpose of this study were to examine the activated cerebral areas using brain functional magnetic resonance imaging（MRI）, when orthodontic tooth separators were inserted, and to confirm the possibility of the transmission route from the medulla oblongata to the hypothalamus.METHODS： Two types of alternative orthodontic tooth separators（brass contact gauge and floss） were inserted into the right upper premolars of 10 healthy volunteers. Brain functional T2＊-weighted images and anatomical T1-weighted images were taken.RESULTS： The blood oxygenation level dependent（BOLD） signals following insertion of a brass contact gauge and floss significantly increased in the somatosensory association cortex and hypothalamic area.CONCLUSION： Our findings suggest the possibility of a transmission route from the medulla oblongata to the hypothalamus.展开更多
Objective To evaluate the feasibility and safety of the self developed sound outside the ventilation device-esophageal nasopharynx catheter in brain functional areas surgery applications. Methods 13 patients involved ...Objective To evaluate the feasibility and safety of the self developed sound outside the ventilation device-esophageal nasopharynx catheter in brain functional areas surgery applications. Methods 13 patients involved functional areas of brain surgery were chosed. After induction of general anesthesia,the catheters were placed in the esophagus,then connected to anesthesia machines to an external展开更多
Ten Chinese patients with brain tumors involving language regions were selected. Preoperative functional MRI was performed to locate Broca＇s or Wernicke＇s area, and the cortex that was essential for language functio...Ten Chinese patients with brain tumors involving language regions were selected. Preoperative functional MRI was performed to locate Broca＇s or Wernicke＇s area, and the cortex that was essential for language function was determined by electrocortical mapping. A site-by-site comparison between functional MRI and electrocortical mapping was performed with the aid of a neuronavigation device. Results showed that the sensitivity and specificity of preoperative functional MRI were 80.0% and 85.0% in Broca＇s area and 66.6% and 85.2% in Wemicke＇s area, respectively. These experimental findings indicate that functional MRI is an accurate, reliable technique with which to identify the location of Wernicke＇s area or Broca＇s area in patients with brain tumors.展开更多
目的观察不同针灸介入时机对大脑中动脉供血区急性脑梗死神经功能预后的影响。方法回顾性选取2020年1月—2022年8月收治的116例大脑中动脉供血区急性脑梗死患者的临床资料进行分析,根据针灸介入时机分为两组。两组均进行静脉溶栓及常规...目的观察不同针灸介入时机对大脑中动脉供血区急性脑梗死神经功能预后的影响。方法回顾性选取2020年1月—2022年8月收治的116例大脑中动脉供血区急性脑梗死患者的临床资料进行分析,根据针灸介入时机分为两组。两组均进行静脉溶栓及常规药物治疗,观察组61例患者于发病72 h内给予针灸治疗,对照组55例患者于发病2周时给予针灸治疗。检测两组不同时间点侧支循环代偿情况、脑损伤标志物的水平,评估两组不同时间点简易精神状态检查(Mini-mental state examination,MMSE)评分、神经功能评分、Barthel指数(Barthel index,BI)评分、肢体运动功能评分、中医症状评分的差异,统计两组疗效。结果治疗前,两组侧支循环代偿情况比较,差异无统计学意义(P>0.05)。治疗4周和随访时,两组患侧大脑前动脉平均血流速度与对侧大脑中动脉平均血流速度的比值(Ratio of the average flow ve⁃locity of the affected anterior cerebral artery to the average flow velocity of the contralateral middle cerebral artery,iVACA/cVM⁃CA)较治疗前升高,观察组同时间点较对照组更高(P<0.05);两组患侧大脑后动脉平均血流速度与对侧大脑中动脉平均血流速度的比值(Ratio of the average flow velocity of the affected posterior cerebral artery to the average flow velocity of the contralateral middle cerebral artery,iVPCA/cVMCA)与治疗前比较,差异无统计学意义(P>0.05)。治疗前,两组脑损伤标志物比较,差异无统计学意义(P>0.05)。治疗4周和随访时,两组脑源性神经营养因子(Brain-derived neurotrophic factor,BDNF)较治疗前升高,观察组同时间点较对照组更高(P<0.05);两组钙结合蛋白β(Calcium binding proteinβ,S100β)、神经胶质纤维酸性蛋白(Glial fibrillary acid protein,GFAP)较治疗前下降,观察组同时间点较对照组更低(P<0.05)。治疗前,两组Fugl-Meyer评分、中医症状评分等相关评分比较,差异无统计学意义(P>0.05)。治疗4周和随访时,两组MMSE评分、BI评分及上肢和下肢Fugl-Meyer评分较治疗前升高,观察组同时间点较对照组更高(P<0.05);两组美国国立卫生院神经功能缺损(National institutes of health stroke scale,NIHSS)评分、中医症状评分较治疗前下降,观察组同时间点较对照组更低(P<0.05)。观察组总有效率为88.52%(54/61)高于对照组的72.73%(40/55),差异有统计学意义(P<0.05)。结论发病72h内采用针灸治疗可改善大脑中动脉供血区急性脑梗死脑损伤标志物的表达,改善脑血流,促进神经功能的恢复,有利于疾病的康复。展开更多
Studies have shown that functional network connection models can be used to study brain net- work changes in patients with schizophrenia. In this study, we inferred that these models could also be used to explore func...Studies have shown that functional network connection models can be used to study brain net- work changes in patients with schizophrenia. In this study, we inferred that these models could also be used to explore functional network connectivity changes in stroke patients. We used independent component analysis to find the motor areas of stroke patients, which is a novel way to determine these areas. In this study, we collected functional magnetic resonance imaging datasets from healthy controls and right-handed stroke patients following their first ever stroke. Using independent component analysis, six spatially independent components highly correlat- ed to the experimental paradigm were extracted. Then, the functional network connectivity of both patients and controls was established to observe the differences between them. The results showed that there were 11 connections in the model in the stroke patients, while there were only four connections in the healthy controls. Further analysis found that some damaged connections may be compensated for by new indirect connections or circuits produced after stroke. These connections may have a direct correlation with the degree of stroke rehabilitation. Our findings suggest that functional network connectivity in stroke patients is more complex than that in hea- lthy controls, and that there is a compensation loop in the functional network following stroke. This implies that functional network reorganization plays a very important role in the process of rehabilitation after stroke.展开更多
Objective:To study the changes of nitric oxide synthase(NOS)activity in penumbral and core area during focal cerebral ischemia and reperfusion,and to explore the therapeutic window of focal cerebral ischemia. Methods...Objective:To study the changes of nitric oxide synthase(NOS)activity in penumbral and core area during focal cerebral ischemia and reperfusion,and to explore the therapeutic window of focal cerebral ischemia. Methods:The middle cerebral artery of rats was occluded for 15,30,60,90 and 120 min by an intraluminal filament respectively,and recirculation was instituted for 24 h.The changes of NOS activity in ischemic core area(parietal cortex and caudoputamen)and penumbral area (frontal cortex)were examined after focal cerebral ischemia and reperfusion using NADPH-d histochemistry technique.Results:The NOS activity of the ischemic penumbral area peaked at 60 min while the ischemic core area peaked at 30 min then declined at 90-120 min sharply.Conclusion:NOS takes part in cerebral ischemic damage during focal cerebral ischemia and reperfusion.The NOS activity of the ischemic penumbral area is different from the ischemic core area.The peak time of the penumbral area is delayed comparing with the core area.The data suggest that the best time to apply NOS inhibitor is within 30 min in ischemic core area, and 60 min in penumbral area.展开更多
基金supported by the National Basic Research Program of China(973 Program),No.2006CB504505,2012CB518504the Third Key Construction Program of "211 Project" of Guangdong Province
文摘In the present study, 10 patients with ischemic stroke in the left hemisphere and six healthy controls were subjected to acupuncture at right Waiguan （TE5）. In ischemic stroke subjects, functional MRI showed enhanced activation in Broadmann areas 5, 6, 7, 18, 19, 24, 32, the hypothalamic inferior lobe, the mamiilary body, and the ventral posterolateral nucleus of the left hemisphere, and Broadmann areas 4, 6, 7, 18, 19 and 32 of the right hemisphere, but attenuated activation of Broadmann area 13, the hypothalamic inferior lobe, the posterior lobe of the tonsil of cerebellum, and the culmen of the anterior lobe of hypophysis, in the left hemisphere and Broadmann area 13 in the right hemisphere. In ischemic stroke subjects, a number of deactivated brain areas were enhanced, including Broadmann areas 6, 11,20, 22, 37, and 47, the culmen of the anterior lobe of hypophysis, alae lingulae cerebella, and the posterior lobe of the tonsil of cerebellum of the left hemisphere, and Broadmann areas 8, 37, 45 and 47, the culmen of the anterior lobe of hypophysis, pars tuberalis adenohypophyseos, inferior border of lentiform nucleus, lateral globus pallidus, inferior temporal gyrus, and the parahippocampal gyrus of the right hemisphere. These subjects also exhibited attenuation of a number of deactivated brain areas, including Broadmann area 7. These data suggest that acupuncture at Waiguan specifically alters brain function in regions associated with sensation, vision, and motion in ischemic stroke patients. By contrast, in normal individuals, acupuncture at Waiguan generally activates brain areas associated with insomnia and other functions.
基金the grant of Science and Technology Bureau of Liaoning Province,No. 20041033
文摘Lead exposure induces decreased hippocampal N-methyI-D-aspartic acid （NMDA） receptor gene and protein expressions, which influences the molecular mechanisms of learning and memory. However, lead poisoning-induced differences in NMDA subunit expression, and the correlation of lead poisoning with learning and memory, remain poorly understood. The present study measured differences in expression of NMDA receptor subunits NR1, NR2A, and NR2B in memory-related brain regions of rats who underwent different doses of lead exposure. Results demonstrated decreased NR1, NR2A, and NR2B subunit expressions in some memory-related brain areas. The inhibitory effect of 4.8 mmol/L lead exposure on hippocampal NR2B was most significant, although NR2A expression also significantly decreased following 14.4 mmol/L lead exposure. There was no difference in NR1 expression following exposure to 〈 4.8 mmol/L lead, although the inhibitory effect of 19.6 mmol/L lead exposure was strongest for NR1 expression in the hippocampus. Inhibitory avoidance test results revealed that greater concentrations of lead exposure resulted in decreased learning and memory. Therefore, lead toxicity was dependent on NMDA receptor subunit composition, and NR1, NR2A, and NR2B expressions were associated with time and concentration of lead exposure.
基金a grant from theMedical Scientific ResearchFoundation of GuangdongProvince, No. A2003526
文摘BACKGROUND ： Functional magnetic resonance imaging （fMRI） studies have disclosed the changes of the motor function in the motor cortex of ipsilateral and contralateral hemispheres of tumor, which have special significance for making the surgical planning and most greatly minimizing the postoperative functional damages. OBJECTIVE： To analyze the association between the manifestation characteristics of hand functional area and motor dysfunction using fMRI in patients with space-occupying lesions of tumor in motor cortex. DESIGN ： A case-controlled observation SETTING： Department of Radiology, Second Affiliated Hospital, Shantou University Medical College .PARTICIPANTS： Twenty-three patients （13 males and 10 females） with space-occupying lesions of central sulcus area, aged 21-53 years with a mean age of （47±1） years were selected from the Second Affiliated Hospital of Shantou University Medical College. All the patients were diagnosed by MR scanning as space-occupying lesions of motor area, and pathologically confirmed that the lesions involved central sulcus and central Iobule; Lesions occurred in left and right hemispheres in 13 and 10 cases respectively. The tumor types were astrocytoma （n =8）, metastatic tumours （n =7）, meningiomas （n =5） and oligodendroglioma （n =3）. The muscle strength was normal in 11 cases （grade 5） and obviously decreased in 12 cases （grade 2-3 in 3 cases and grade 4 in 9 cases）; muscle strengths of both upper and lower limbs were decreased in 7 cases, and only that of upper limbs was decreased in 5 cases. Informed consents were obtained from all the subjects. Meanwhile, 9 healthy physical examinees （5 males and 4 females） of 20-56 years old with an average of （34±1） years were taken as controls. All the patients and healthy subjects were right-handed. METHODS： All the enrolled subjects were examined with MR scanning and functional imaging. Twenty cases whose clinical symptoms were mild in the patient group and 9 healthy volunteers adopted simple active finger-tapping movements, and for the 3 cases whose clinical symptoms were severe in the patient group, the simple passive finger-tapping movements were used. The manifestations in the activated brain areas were analyzed in the patients with brain tumor of different muscle strength and the controls. The motor deficit and activation of contralateral primary motor cortex （M1） in simple finger-tapping movements were observed in the patient group. MAIN OUTCOME MEASURES： （1） Brain areas activated by finger-tapping movements in each group： （2） Activated volumes in hemisphere by finger-tapping movements between groups. RESULTS： The contralateral M1 area could not be activated in 1 case in the patient group,, all the other 22 patients and 9 healthy subjects were involved in the analysis of results. （1） In the control group, unilateral finger tapping movement activated the contralateral primary motor cortex （M1）, bilateral SMA and bilateral PMC. The activation volume was the largest in contralateral primary motor cortex （M1）, smaller in the SMA, and the smallest in PMC. The finger tapping movement in healthy subjects could activate contralateral primary motor cortex （M1）, bilateral SMA and bilateral PMC, which had no obvious differences from the manifestations of brain functional area activated by active finger tapping. There was no significant difference in the volume of activated functional areas between right and left hands. In the patient group, the central sulcos around the tumor in the activated M1 area displaced towards dorsal or ventral side, also extended. The distance of displacement in the functional area was determined as compared with the contralateral central sulcus, and the results suggested the M1 displacement, including that there were 10 cases with the M1 displacement larger than 10 mm in the patients with motor deficit, which were obviously more than in those without motor deficit （n =1, P 〈 0.01）, and the activated volume in contralateral M1 area was obvious smaller in the patients with motor deficit than in those without motor deficit （P 〈 0.01）. （2） The M1 activation and changes were observed in contralateral hemisphere in the patient group, and the activated volume was obviously larger than that in the control group （P 〈 0.01）. The activated volumes of M1 and PMC in ipsilateral hemisphere were obviously larger than those in the control group （P 〈 0.05）, but that of SMA had no obvious difference between the two groups （P 〉 0.05）. CONCLUSION： fMRI can be used to observe the activation of the brain motor functional areas of patient with space-occupying lesions in motor area, and evaluate the state of their motor function. The larger the distance of displacement of M1 compressed by tumor, the more obviously the muscle strength decreases in the patients.
文摘Totally three articles focusing on functional magnetic resonance imaging features of brain function in the activated brain regions of stroke patients undergoing acupuncture on the healthy limbs and healthy controls undergoing acupuncture on the lower extremities are published in three issues. We hope that our readers find these papers useful to their research.
基金supported by the Science and Technology Innovation Nursery Foundation of Chinese PLA General Hospital, No. 09KMM41
文摘Changes in activated areas of the brain during ankle active dorsiflexion and ankle active plantar flexion were observed in six healthy subjects using functional magnetic resonance imaging. Excited areas of ankle active dorsiflexion involved the bilateral primary motor area and the primary somatosensory area, as well as the bilateral supplementary sensory area, the primary visual area, the right second visual area, and the vermis of cerebellum. Excited areas of ankle active plantar flexion included the ipsilateral supplementary motor area, the limbic system, and the contralateral corpus striatum. Fine movements of the cerebral cortex control the function of the ankle dorsiflexion to a larger extent than ankle plate flexion, and the function of ankle plate flexion is more controlled by the subcortical area.
基金the State Plan for Development of Basic Research in Key Areas(973 Program)in China,No.2006CB504505,2012CB518504the Key Subject Construction Project of"211 Engineering"III Stage of Guangdong Province in Chinathe Guangdong Provincial"College Students’Innovative Experiment Plan"Project in China,No.1212112038
文摘Most studies addressing the specificity of meridians and acupuncture points have focused mainly on the different neural effects of acupuncture at different points in healthy individuals. This study examined the effects of acupuncture on brain function in a pathological context. Sixteen patients with ischemic stroke were randomly assigned to true point group （true acupuncture at right Waiguan （SJ5）） and sham point group （sham acupuncture）. Results of functional magnetic resonance imaging revealed activation in right parietal lobe （Brodmann areas 7 and 19）, the right temporal lobe （Brodmann area 39）, the right limbic lobe （Brodmann area 23） and bilateral oc-cipital lobes （Brodmann area 18）. Furthermore, inhibition of bilateral frontal lobes （Brodmann area 4, 6, and 45）, right parietal lobe （Brodmann areas 1 and 5） and left temporal lobe （Brodmann area 21 ） were observed in the true point group. Activation in the precuneus of right parietal lobe （Brodmann area 7） and inhibition of the left superior frontal gyrus （Brodmann area 10） was observed in the sham group. Compared with sham acupuncture, acupuncture at Waiguan in stroke patients inhibited Brodmann area 5 on the healthy side. Results indicated that the altered specificity of sensation-associated cortex （Brodmann area 5） is possibly associated with a central mechanism of acupuncture at Waiguan for stroke patients.
文摘Traumatic brain injury（TBI）represents a global pandemic and is currently a leading cause of injury related death worldwide.Unfortunately,those who survive initial injury often suffer devastating functional,social,and economic consequences.
基金partially supported by a Grant-in-Aid for Scientific Research(C)(26462862)from the Japan Society for the Promotion of Science
文摘OBJECTIVES： An animal experiment clarified that insertion of an orthodontic apparatus activated the trigeminal neurons of the medulla oblongata. Orthodontic tooth movement is known to be associated with the sympathetic nervous system and controlled by the nucleus of the hypothalamus. However, the transmission of both has not been demonstrated in humans. The purpose of this study were to examine the activated cerebral areas using brain functional magnetic resonance imaging（MRI）, when orthodontic tooth separators were inserted, and to confirm the possibility of the transmission route from the medulla oblongata to the hypothalamus.METHODS： Two types of alternative orthodontic tooth separators（brass contact gauge and floss） were inserted into the right upper premolars of 10 healthy volunteers. Brain functional T2＊-weighted images and anatomical T1-weighted images were taken.RESULTS： The blood oxygenation level dependent（BOLD） signals following insertion of a brass contact gauge and floss significantly increased in the somatosensory association cortex and hypothalamic area.CONCLUSION： Our findings suggest the possibility of a transmission route from the medulla oblongata to the hypothalamus.
文摘Objective To evaluate the feasibility and safety of the self developed sound outside the ventilation device-esophageal nasopharynx catheter in brain functional areas surgery applications. Methods 13 patients involved functional areas of brain surgery were chosed. After induction of general anesthesia,the catheters were placed in the esophagus,then connected to anesthesia machines to an external
基金supported by the Key Technologies R&D Program of Ningxia Hui Autonomous Region in 2008,No.2008-165-17the Key Technologies R&D Program of Ningxia Hui Autonomous Region in 2011,No. 2011-89
文摘Ten Chinese patients with brain tumors involving language regions were selected. Preoperative functional MRI was performed to locate Broca＇s or Wernicke＇s area, and the cortex that was essential for language function was determined by electrocortical mapping. A site-by-site comparison between functional MRI and electrocortical mapping was performed with the aid of a neuronavigation device. Results showed that the sensitivity and specificity of preoperative functional MRI were 80.0% and 85.0% in Broca＇s area and 66.6% and 85.2% in Wemicke＇s area, respectively. These experimental findings indicate that functional MRI is an accurate, reliable technique with which to identify the location of Wernicke＇s area or Broca＇s area in patients with brain tumors.
文摘目的观察不同针灸介入时机对大脑中动脉供血区急性脑梗死神经功能预后的影响。方法回顾性选取2020年1月—2022年8月收治的116例大脑中动脉供血区急性脑梗死患者的临床资料进行分析,根据针灸介入时机分为两组。两组均进行静脉溶栓及常规药物治疗,观察组61例患者于发病72 h内给予针灸治疗,对照组55例患者于发病2周时给予针灸治疗。检测两组不同时间点侧支循环代偿情况、脑损伤标志物的水平,评估两组不同时间点简易精神状态检查(Mini-mental state examination,MMSE)评分、神经功能评分、Barthel指数(Barthel index,BI)评分、肢体运动功能评分、中医症状评分的差异,统计两组疗效。结果治疗前,两组侧支循环代偿情况比较,差异无统计学意义(P>0.05)。治疗4周和随访时,两组患侧大脑前动脉平均血流速度与对侧大脑中动脉平均血流速度的比值(Ratio of the average flow ve⁃locity of the affected anterior cerebral artery to the average flow velocity of the contralateral middle cerebral artery,iVACA/cVM⁃CA)较治疗前升高,观察组同时间点较对照组更高(P<0.05);两组患侧大脑后动脉平均血流速度与对侧大脑中动脉平均血流速度的比值(Ratio of the average flow velocity of the affected posterior cerebral artery to the average flow velocity of the contralateral middle cerebral artery,iVPCA/cVMCA)与治疗前比较,差异无统计学意义(P>0.05)。治疗前,两组脑损伤标志物比较,差异无统计学意义(P>0.05)。治疗4周和随访时,两组脑源性神经营养因子(Brain-derived neurotrophic factor,BDNF)较治疗前升高,观察组同时间点较对照组更高(P<0.05);两组钙结合蛋白β(Calcium binding proteinβ,S100β)、神经胶质纤维酸性蛋白(Glial fibrillary acid protein,GFAP)较治疗前下降,观察组同时间点较对照组更低(P<0.05)。治疗前,两组Fugl-Meyer评分、中医症状评分等相关评分比较,差异无统计学意义(P>0.05)。治疗4周和随访时,两组MMSE评分、BI评分及上肢和下肢Fugl-Meyer评分较治疗前升高,观察组同时间点较对照组更高(P<0.05);两组美国国立卫生院神经功能缺损(National institutes of health stroke scale,NIHSS)评分、中医症状评分较治疗前下降,观察组同时间点较对照组更低(P<0.05)。观察组总有效率为88.52%(54/61)高于对照组的72.73%(40/55),差异有统计学意义(P<0.05)。结论发病72h内采用针灸治疗可改善大脑中动脉供血区急性脑梗死脑损伤标志物的表达,改善脑血流,促进神经功能的恢复,有利于疾病的康复。
基金supported by the National Natural Science Foundation of China,No.60905024
文摘Studies have shown that functional network connection models can be used to study brain net- work changes in patients with schizophrenia. In this study, we inferred that these models could also be used to explore functional network connectivity changes in stroke patients. We used independent component analysis to find the motor areas of stroke patients, which is a novel way to determine these areas. In this study, we collected functional magnetic resonance imaging datasets from healthy controls and right-handed stroke patients following their first ever stroke. Using independent component analysis, six spatially independent components highly correlat- ed to the experimental paradigm were extracted. Then, the functional network connectivity of both patients and controls was established to observe the differences between them. The results showed that there were 11 connections in the model in the stroke patients, while there were only four connections in the healthy controls. Further analysis found that some damaged connections may be compensated for by new indirect connections or circuits produced after stroke. These connections may have a direct correlation with the degree of stroke rehabilitation. Our findings suggest that functional network connectivity in stroke patients is more complex than that in hea- lthy controls, and that there is a compensation loop in the functional network following stroke. This implies that functional network reorganization plays a very important role in the process of rehabilitation after stroke.
文摘Objective:To study the changes of nitric oxide synthase(NOS)activity in penumbral and core area during focal cerebral ischemia and reperfusion,and to explore the therapeutic window of focal cerebral ischemia. Methods:The middle cerebral artery of rats was occluded for 15,30,60,90 and 120 min by an intraluminal filament respectively,and recirculation was instituted for 24 h.The changes of NOS activity in ischemic core area(parietal cortex and caudoputamen)and penumbral area (frontal cortex)were examined after focal cerebral ischemia and reperfusion using NADPH-d histochemistry technique.Results:The NOS activity of the ischemic penumbral area peaked at 60 min while the ischemic core area peaked at 30 min then declined at 90-120 min sharply.Conclusion:NOS takes part in cerebral ischemic damage during focal cerebral ischemia and reperfusion.The NOS activity of the ischemic penumbral area is different from the ischemic core area.The peak time of the penumbral area is delayed comparing with the core area.The data suggest that the best time to apply NOS inhibitor is within 30 min in ischemic core area, and 60 min in penumbral area.
