Neuroimaging studies of mood disorders

被引:975
作者
Drevets, WC
机构
[1] Univ Pittsburgh, Med Ctr, Dept Psychiat, Pittsburgh, PA 15213 USA
[2] Univ Pittsburgh, Dept Radiol, Pittsburgh, PA 15213 USA
关键词
positron emission tomography (PET); magnetic resonance imaging (MRI); major depression; prefrontal cortex; anterior cingulate; amygdala;
D O I
10.1016/S0006-3223(00)01020-9
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Neuroimaging studies of major depression have identified neurophysiologic abnormalities in multiple areas of the orbital and medial prefrontal cortex, the amygdala, and related parts of the striatum and thalamus. Some of these abnormalities appear mood state-dependent and are located in regions where cerebral blood flow increases during normal and other pathologic emotional states. These neurophysiologic differences between depressives and control subjects may thus implicate areas where physiologic activity changes to mediate or respond to the emotional, behavioral, and cognitive manifestations of major depressive episodes. Other abnormalities persist following symptom remission, and are found in orbital and medial prefrontal cortex areas where postmortem studies demonstrate reductions in colter volume and histopathologic changes in primary mood disorders. These areas appear to modulate emotional behavior and stress responses, based upon evidence from brain mapping, lesion analysis, and electrophysiologic studies of humans and/or experimental animals. Dysfunction involving these regions is thus hypothesized to play a role in the pathogenesis of depressive symptoms. Taken together, these findings implicate interconnected neural circuits in which pathologic patterns of neurotransmission may result in the emotional, motivational, cognitive, and behavioral manifestations of primary and secondary affective disorders. Biol Psychiatry 2000;48:813-829 (C) 2000 Society of Biological Psychiatry.
引用
收藏
页码:813 / 829
页数:17
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