Adams J C
J Comp Neurol. 1976 Nov 1;170(1):97-106. doi: 10.1002/cne.901700107.
Studies were made of the fiber compositon and of single unit dischage characteristics in the dorsal and intermediate acoustic straie. Counts of fibers and cells revealed more than twice as many fibers as cochlear nucleus cells of the types known to contribute axons to these tracts. Recordings were made in the striae to confirm the classes of discharge patterns which are transmitted from the posterior cochlear nucleus to more central structures and to seek evidence for descending activity entering the cochlear nucleus through the striae. Discharge patterns of the majority of units resembled those seen in previous studies when recordings were made from regions of the cochlear nucleus which are known to contribute fibers to the striae. Some patterns, however, were unlike any which have been reported in the cochlear nucleus on the same side as the recording site, but resembled activity of other auditory structures, suggesting that these were descending inputs. To confirm the presence of descending activity, recordings were made in the dorsal acoustic stria at a point medial to where the stria had been completely severed. Recordings made under these conditions demonstrated the presence of descending activity. The physiological findings help explain the disparity between the counts of fibers and cells, and point out a need for more detailed descriptions of the origins of descending inputs through the striae.
对背侧和中间听纹的纤维组成及单单位放电特性进行了研究。纤维和细胞计数显示，向这些神经束贡献轴突的已知类型的纤维数量是蜗神经核细胞数量的两倍多。在听纹中进行记录，以确认从蜗神经后核传递到更中枢结构的放电模式类别，并寻找通过听纹进入蜗神经核的下行活动的证据。大多数单位的放电模式与之前在蜗神经核区域进行记录时观察到的模式相似，这些区域已知会向听纹贡献纤维。然而，一些模式与记录部位同侧蜗神经核中报道的任何模式都不同，但类似于其他听觉结构的活动，这表明这些是下行输入。为了确认下行活动的存在，在听纹完全切断部位内侧的背侧听纹中进行记录。在这些条件下进行的记录证明了下行活动的存在。生理学发现有助于解释纤维和细胞计数之间的差异，并指出需要更详细地描述通过听纹的下行输入的起源。
