CONNECTIONAL ANALYSIS OF THE IPSILATERAL AND CONTRALATERAL AFFERENT NEURONS OF THE SUPERIOR TEMPORAL REGION IN THE RHESUS-MONKEY
CONNECTIONAL ANALYSIS OF THE IPSILATERAL AND CONTRALATERAL AFFERENT NEURONS OF THE SUPERIOR TEMPORAL REGION IN THE RHESUS-MONKEY
复制标题
DOI：
10.1002/cne.902810407
复制
发表时间：
1989-03-22
影响因子：
2.5
通讯作者：
PANDYA, DN
中科院分区：
文献类型：
--
作者：
CIPOLLONI, PB;PANDYA, DN
用荧光逆行示踪剂（双胺黄和快蓝）研究了大鼠颞上区（STR）的半球间和同侧传入事件。将不同的示踪剂注射到4只恒河猴的每个半球的特定皮质区域。结果表明，大脑半球间传入事件不仅来自同向性区域，也来自异向性区域。产生半球间突起的异位区与同侧突起起源的皮质区相对应。虽然两个传入系统的标记神经元有相当大的重叠，但只偶尔发现双标记神经元。虽然同侧神经元的层流模式差异很大，但半球间投射神经元主要位于皮层III层。本研究提供了关于颞上区的同侧连接组织的额外信息。也就是说，初级听觉区不仅接收来自相邻的外侧和内侧皮质区域的投射，还接收来自相邻的吻侧和尾侧皮质区域的投射。因此，高度分化的初级听觉皮质区接收周围分化程度较低的皮质区的强烈投射。从皮层发育的生长环概念的角度讨论了这种连接模式。
The interhemispheric and ipsilateral afferents of the superior temporal region (STR) were investigated with the aid of fluorescent retrograde tracers (Diamidino Yellow and Fast Blue). Different tracers were injected in selected cortical areas of the STR of each hemisphere of four rhesus monkeys. The results show that the interhemispheric afferents originate not only from the homotropic but also from heterotopic areas. The heterotopic areas giving rise to interhemispheric projections correspond to cortical areas of the origin of the ipsilateral projections. Although there is considerable overlap of labeled neurons of both afferent systems, only occasional double-labeled neurons are found. Whereas the laminar patterns of ipsilateral neurons of origin vary considerably, the interhemispheric projection neurons are located mainly in cortical layer III. This study provides additional information abut the ipsilateral connectional organization of the superior temporal region. That is, the primary auditory area receives projections not only from adjacent lateral and medial cortical regions but also from adjoining rostral and caudal cortical regions. Thus, the highly differentiated primary auditory cortical area receives strong projections from the surrounding less-differentiated cortical regions. This connectional pattern is discussed from the perspective of the growth ring concept of cortical development.