Synaptic development of layer V pyramidal neurons in the prenatal human prefrontal neocortex: a Neurolucida-aided Golgi study
Li-Xin He1
Lily Wan2
Wei Xiang3
Jian-Ming Li4
An-Hua Pan5
Da-Hua Lu5
1.Xiangtan Medicine and Health Vocational College, Xiangtan, Hunan Province, China2.Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan Province, China3.Changde Vocational Technical College, Changde, Hunan Province, China4.Department of Anatomy, Changsha Medical University, Changsha, Hunan Province, China5.Department of Anatomy and Neurobiology, Xiangya School of Medicine, Central South University, Changsha, Hunan Province, China
摘要：The prefrontal neocortex is involved in many high cognitive functions in humans. Deficits in neuronal and neurocircuitry development in this part of the cerebrum have been associated with various neuropsychiatric disorders in adolescents and adults. There are currently little available data regarding prenatal dendrite and spine formation on projecting neurons in the human prefrontal neocortex. Previous studies have demonstrated that Golgi silver staining can identify neurons in the frontal lobe and visual cortex in human embryos. In the present study, five fetal brains, at 19, 20, 26, 35, and 38 gestational weeks, were obtained via the body donation program at Xiangya School of Med-icine, Central South University, China. Golgi-stained pyramidal neurons in layer V of Brodmann area 46 in fetuses were quantitatively analyzed using the Neurolucida morphometry system. Results revealed that somal size, total dendritic length, and branching points of these neurons increased from 26 to 38 gestational weeks. There was also a large increase in dendritic spines from 35 to 38 gestational weeks. These findings indicate that, in the human prefrontal neocortex, dendritic growth in layer V pyramidal neurons occurs rapidly during the third trimester of gestation. The use of human fetal brain tissue was approved by the Animal Ethics Committee of Xiangya School of Medi-cine, Central South University, China (approval No. 2011-045) on April 5, 2011.
机标关键词：
分类号：R446(诊断学)R741(神经病学)Q344(遗传学分支学科)
论文发表日期：2020-08-28
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：6( 1490-1495 )
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