FUNCTIONAL ANATOMY OF THE SOMATOSENSORY CORTEX OF THE MONKEY

躯体感觉信息到达边缘的通路 已知的对触觉记忆至关重要的颞叶结构有 现在已经被描绘出来了。为了追踪这条路径，人体的解剖联系 电生理识别的躯体感觉野位于或靠近 对猕猴的侧沟进行了顺行扫描和扫描。 逆行轴突运输技术。数据显示，一系列 平行的触觉处理路径汇聚在岛叶皮质上；这 反过来，该区域直接投射到杏仁核，并间接投射到 海马体通过鼻皮质，从而连接躯体感觉皮质 与颞叶的边缘结构相关联。 为了进一步描述的功能属性和关系 在各个躯体领域，人们都进行了电生理学研究。 后脑岛的神经元具有典型的高级反应特性 其他医疗设备中的订单处理字段。此外，体细胞田野 在外侧沟中似乎依赖于SI的躯体输入 因为这些区域的神经元不再对触觉刺激做出反应 在消融SI后。从比较的角度审视这个问题 从角度来看，体细胞区域的皮质连接 在猫身上学习。猫和猴子有相似的连接模式， 但是，在猫身上，这些领域之间有更广泛的联系。 丘脑输入对脑功能特性的贡献 用轴突运输技术研究了体细胞场。这个 这一发现为丘脑皮质连接的组织提供了新的线索 通过显示不同的丘脑核团投射到第一(SI)和 第二(SII)体体场和SI之外体体场 他们的输入来自一系列丘脑核团，而不是像以前那样只有一个 我之前也这么想过。

A pathway by which somatosensory information could reach the limbic structues in the temporal lobe known to be critical for tactile memory has now been delineated. To trace this pathway, the anatomical connections of electrophysiologically identified somatosensory fields lying in or near the lateral sulcus of the macaque were investigated with both anterograde and retrograde axonal transport techniques. The data show that a series of parallel tactile processing pathways converge on the insular cortex; this region, in turn, projects directly to the amygdala and indirectly to the hippocampus via the rhinal cortex, thus linking the somatosensory cortices with the limbic structures of the temporal lobe. To further describe the functional properties and relationships of the various somatic fields, electrophysiological studies have been undertaken. Neurons of the posterior insula have response properties typical of higher order processing fields in other modalities. Further, the somatic fields in the lateral sulcus appear to be dependent on SI for their somatic input because neurons in these fields no longer respond to tactile stimulation following ablation of SI. To examine this problem from a comparative perspective, the cortical connections of the somatic fields have been studied in the cat. The cat and monkey have similar connectional patterns, but, in the cat, there are more widespread connections among these fields. The contribution of thalamic inputs to the functional properties of the somatic fields have been studied with axonal transport techniques. The findings shed new light on the organization of thalamocortical connections by showing that different thalamic nuclei project to the first (SI) and second (SII) somatic fields and that somatic fields outside of SI receive their inputs from an array of thalamic nuclei rather than just one, as had been thought previously.