BMR （basal metabolic rate）, body mass and organ masses of tree sparrows （Passer montanus） were measured to analyze the correlation between organ masses and BMR in tree sparrows, and to evaluate the underlying phys...BMR （basal metabolic rate）, body mass and organ masses of tree sparrows （Passer montanus） were measured to analyze the correlation between organ masses and BMR in tree sparrows, and to evaluate the underlying physiological causes of difference in BMR. Adult tree sparrows were live-trapped by mist net in Qiqihar City, Heilongjiang Province （47°29′N, 124°02′E）. The closed circuit respirometer was used to measure the metabolic rate （MR）, and controlled the ambient temperature by using a water bath （±0.5℃）. Body masses were measured to the nearest 0.01 g before and after BMR measurements with a Sartorius balance （model BT25S）. The mean value was recorded as body mass. Wet and dry masses of several organs were measured, too. BMR was （4.276± 0.385） mL O2/（g·h） and mean body mass was （18.522±0.110） g. Since not all the variables were normal distributed, a log10- transformation of those variables was employed to linearize them, prior to analyses. Simple regression analyses indicated that most organ masses showed a significant high correlation with body mass. Both the small intestine and rectum masses were notable exception to that trend. The body-mass-adjusted residual analysis showed that only the kidney wet mass, brain mass, stomach mass, small mass and rectum wet mass correlated with BMR. In addition, correlations between several organ masses and BMR were observed. Because of the inter-correlations of organ masses, a principal component analysis （PCA） was performed to redefine the morphological variability. The first four components whose eigenvalues were greater than 1 could explain 75.2% variance of BMR. The first component, whose proportion reached 30.19%, was affected mainly by stomach mass, small intestine mass and rectum mass. Therefore, the results supported the hypothesis that BMR was controlled by some ＂expensive metabolic＂ organs展开更多
抑郁症是最普遍的精神疾病,将成为全球疾病的负担,睡眠障碍也将成为抑郁症患者的隐性杀手。抑郁症与睡眠障碍之间存在着密切的联系,常共同出现。目前临床研究以睡眠和认知功能障碍为研究热点,但受限于科学技术,其机制及影响尚不明确。...抑郁症是最普遍的精神疾病,将成为全球疾病的负担,睡眠障碍也将成为抑郁症患者的隐性杀手。抑郁症与睡眠障碍之间存在着密切的联系,常共同出现。目前临床研究以睡眠和认知功能障碍为研究热点,但受限于科学技术,其机制及影响尚不明确。近年来得益于功能磁共振成像(functional magnetic resonance imaging,fMRI)的发展,许多新的成像方法应运而生,利用神经影像技术观察抑郁伴睡眠障碍的研究也越来越多。本文将从抑郁伴睡眠障碍的核脑影像成像技术进行综述。展开更多
基金Supported by Natural Foundation for Youth of Daqing Normal College (YZQ004)
文摘BMR （basal metabolic rate）, body mass and organ masses of tree sparrows （Passer montanus） were measured to analyze the correlation between organ masses and BMR in tree sparrows, and to evaluate the underlying physiological causes of difference in BMR. Adult tree sparrows were live-trapped by mist net in Qiqihar City, Heilongjiang Province （47°29′N, 124°02′E）. The closed circuit respirometer was used to measure the metabolic rate （MR）, and controlled the ambient temperature by using a water bath （±0.5℃）. Body masses were measured to the nearest 0.01 g before and after BMR measurements with a Sartorius balance （model BT25S）. The mean value was recorded as body mass. Wet and dry masses of several organs were measured, too. BMR was （4.276± 0.385） mL O2/（g·h） and mean body mass was （18.522±0.110） g. Since not all the variables were normal distributed, a log10- transformation of those variables was employed to linearize them, prior to analyses. Simple regression analyses indicated that most organ masses showed a significant high correlation with body mass. Both the small intestine and rectum masses were notable exception to that trend. The body-mass-adjusted residual analysis showed that only the kidney wet mass, brain mass, stomach mass, small mass and rectum wet mass correlated with BMR. In addition, correlations between several organ masses and BMR were observed. Because of the inter-correlations of organ masses, a principal component analysis （PCA） was performed to redefine the morphological variability. The first four components whose eigenvalues were greater than 1 could explain 75.2% variance of BMR. The first component, whose proportion reached 30.19%, was affected mainly by stomach mass, small intestine mass and rectum mass. Therefore, the results supported the hypothesis that BMR was controlled by some ＂expensive metabolic＂ organs
文摘抑郁症是最普遍的精神疾病,将成为全球疾病的负担,睡眠障碍也将成为抑郁症患者的隐性杀手。抑郁症与睡眠障碍之间存在着密切的联系,常共同出现。目前临床研究以睡眠和认知功能障碍为研究热点,但受限于科学技术,其机制及影响尚不明确。近年来得益于功能磁共振成像(functional magnetic resonance imaging,fMRI)的发展,许多新的成像方法应运而生,利用神经影像技术观察抑郁伴睡眠障碍的研究也越来越多。本文将从抑郁伴睡眠障碍的核脑影像成像技术进行综述。
