The auditory system of monkeys includes a large number of interconnected subcortical nuclei and cortical areas. At subcortical levels, the structural components of the auditory system of monkeys resemble those of nonprimates, but the organization at cortical levels is different. In monkeys, the ventral nucleus of the medial geniculate complex projects in parallel to a core of three primary-like auditory areas, AI, R, and RT, constituting the first stage of cortical processing. These areas interconnect and project to the homotopic and other locations in the opposite cerebral hemisphere and to a surrounding array of eight proposed belt areas as a second stage of cortical processing. The belt areas in turn project in overlapping patterns to a lateral parabelt region with at least rostral and caudal subdivisions as a third stage of cortical processing. The divisions of the parabelt distribute to adjoining auditory and multimodal regions of the temporal lobe and to four functionally distinct regions of the frontal lobe. Histochemically, chimpanzees and humans have an auditory core that closely resembles that of monkeys. The challenge for future researchers is to understand how this complex system in monkeys analyzes and utilizes auditory information.

译文

:猴子的听觉系统包括大量相互连接的皮层下核和皮层区域。在皮下层,猴子的听觉系统的结构成分类似于非灵长类动物,但是在皮层上的组织是不同的。在猴子中,内侧膝状复合体的腹侧核平行于三个初级样听觉区域(AI,R和RT)的核心突出,构成了皮质加工的第一阶段。这些区域相互连接并投射到相对的大脑半球的同位和其他位置,并投射到八个拟议的皮带区域周围的阵列,作为皮质处理的第二阶段。带区又以重叠的方式突出到侧副带区域,该侧副带区域至少具有鼻侧和尾侧细分,作为皮质处理的第三阶段。副腰带的划分分布在颞叶的相邻听觉和多峰区域以及额叶的四个功能不同的区域。在组织化学上,黑猩猩和人类的听觉核心与猴子非常相似。未来研究人员面临的挑战是了解猴子中这个复杂的系统如何分析和利用听觉信息。

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