目的·探索额叶-边缘系统的功能连接特征在预测精神病临床高危综合征(clinical high-risk for psychosis,CHR)患者转化为精神分裂症中的作用。方法·募集CHR被试164例和健康对照89例,采集静息态功能性磁共振成像,计算基线时额叶...目的·探索额叶-边缘系统的功能连接特征在预测精神病临床高危综合征(clinical high-risk for psychosis,CHR)患者转化为精神分裂症中的作用。方法·募集CHR被试164例和健康对照89例,采集静息态功能性磁共振成像,计算基线时额叶(内侧前额叶、双侧眶额)和边缘系统(双侧海马、双侧杏仁核)脑区之间的功能连接强度。CHR组根据1年随访的临床结局被细分为3个亚组,即转化组(CHR-C组,转为精神分裂症)、症状组(CHR-S组,仍符合CHR诊断标准)和缓解组(CHR-R组,症状缓解)。比较额叶-边缘系统功能连接的组间及亚组间差异,分析其与脑区的交互作用,以及与阳性、阴性症状的相关性。结果·额叶-边缘系统功能连接的组别主效应不显著(P=0.110),但分亚组时存在显著的亚组与脑区交互作用(P=0.049)。CHR-C组双侧眶额-双侧杏仁核的功能连接强度显著低于健康对照组和CHR-R组(均P<0.05),3个CHR亚组左侧眶额-左侧海马功能连接强度均显著低于健康对照组(均P<0.05)。CHR-C组左侧眶额-右侧杏仁核功能连接异常与阴性症状严重程度呈显著正相关(P<0.05),而左侧眶额-双侧海马及右侧眶额-左侧海马功能连接异常与阳性症状严重程度呈显著负相关(均P<0.05)。结论·CHR患者可能普遍存在眶额-海马功能连接降低,而眶额-杏仁核功能连接低下可能对CHR患者后期转化为精神分裂症有一定的预测作用。展开更多
The movement- related potential (MRP) is an EEG measure related to self- initiated movements, consisting of the Bereitschaftspotential (BP), the negative slope, and the motor potential. Since in a former study the BP ...The movement- related potential (MRP) is an EEG measure related to self- initiated movements, consisting of the Bereitschaftspotential (BP), the negative slope, and the motor potential. Since in a former study the BP was reduced in acute prefrontal traumatic brain injury (TBI) patients, the present study examined the MRPs’ course in follow- up examinations. Right index finger MRPs of 22 patients with contusions of the prefrontal cortex were recorded 12, 26, and 52 weeks after TBI and compared to controls. Within the patient group, a significant increase of the BP in the temporal course after TBI was observed. MRPs 12 and 26 weeks after TBI did not differ significantly from the control group. One year after TBI, significantly enhanced BPs were found. In the temporal course after prefrontal TBI, a recovery of the initially reduced BP was observed. The enhanced BP areas 1 year after TBI might represent the need for increased cognitive resources during movement preparation, supporting a recovered, but less effective neuronal network. The present study represents the first longitudinal follow- up study of MRPs after prefrontal brain lesion. The observed changes reflect the plastic capacity of the brain, reorganizing the neuronal network function.展开更多
文摘目的·探索额叶-边缘系统的功能连接特征在预测精神病临床高危综合征(clinical high-risk for psychosis,CHR)患者转化为精神分裂症中的作用。方法·募集CHR被试164例和健康对照89例,采集静息态功能性磁共振成像,计算基线时额叶(内侧前额叶、双侧眶额)和边缘系统(双侧海马、双侧杏仁核)脑区之间的功能连接强度。CHR组根据1年随访的临床结局被细分为3个亚组,即转化组(CHR-C组,转为精神分裂症)、症状组(CHR-S组,仍符合CHR诊断标准)和缓解组(CHR-R组,症状缓解)。比较额叶-边缘系统功能连接的组间及亚组间差异,分析其与脑区的交互作用,以及与阳性、阴性症状的相关性。结果·额叶-边缘系统功能连接的组别主效应不显著(P=0.110),但分亚组时存在显著的亚组与脑区交互作用(P=0.049)。CHR-C组双侧眶额-双侧杏仁核的功能连接强度显著低于健康对照组和CHR-R组(均P<0.05),3个CHR亚组左侧眶额-左侧海马功能连接强度均显著低于健康对照组(均P<0.05)。CHR-C组左侧眶额-右侧杏仁核功能连接异常与阴性症状严重程度呈显著正相关(P<0.05),而左侧眶额-双侧海马及右侧眶额-左侧海马功能连接异常与阳性症状严重程度呈显著负相关(均P<0.05)。结论·CHR患者可能普遍存在眶额-海马功能连接降低,而眶额-杏仁核功能连接低下可能对CHR患者后期转化为精神分裂症有一定的预测作用。
文摘The movement- related potential (MRP) is an EEG measure related to self- initiated movements, consisting of the Bereitschaftspotential (BP), the negative slope, and the motor potential. Since in a former study the BP was reduced in acute prefrontal traumatic brain injury (TBI) patients, the present study examined the MRPs’ course in follow- up examinations. Right index finger MRPs of 22 patients with contusions of the prefrontal cortex were recorded 12, 26, and 52 weeks after TBI and compared to controls. Within the patient group, a significant increase of the BP in the temporal course after TBI was observed. MRPs 12 and 26 weeks after TBI did not differ significantly from the control group. One year after TBI, significantly enhanced BPs were found. In the temporal course after prefrontal TBI, a recovery of the initially reduced BP was observed. The enhanced BP areas 1 year after TBI might represent the need for increased cognitive resources during movement preparation, supporting a recovered, but less effective neuronal network. The present study represents the first longitudinal follow- up study of MRPs after prefrontal brain lesion. The observed changes reflect the plastic capacity of the brain, reorganizing the neuronal network function.
