AN EXPERIMENTAL STUDY ON TOPOGRAPHICAL PROJECTION OF THE SPIRAL GANGLION TO THE COCHLEAR NUCLEI IN THE CAT
- VernacularTitle:猫螺旋神经节在耳蜗核中局部定位投射的实验研究
- Author:
Gong JU
- Publication Type:Journal Article
- From:
Acta Anatomica Sinica
1953;0(01):-
- CountryChina
- Language:Chinese
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Abstract:
Different parts of the cochlea were destroyed in 6 cats (11 sides). The degenerating fibers and preterminal degenerations were studied by the Nauta technique with the following conclusions: 1. The overwhelming majority of the fibers from the spiral ganglion project to within the limit of the cochlear nucleus complex. No fiber degeneration could be found in the trapezoid body. A few degenerating fibers from the basal turn of the spiral ganglion, however, were found in the dorsal acoustic stria. 2. No preteriminal degeneration was found in the “granular cell masses” and “dorsal cell complex of the acoustic tubercle”of G. Fuse. 3. In the dorsal cochlear nucleus, degenerating fibers were found to terminate in the II-V layers. 4. Contrary to Lorente de No’s finding, the present study showed that the fibers from the basal portion of the spiral ganglion bifurcate at the dorsal part of the ventral cochlear nucleus, those from the apical portion at the ventral part. 5. The spiral ganglion projects in a clear-cut topographical way to the 3 parts of the cochlear nucleus complex, viz, the basal portion and the successively more apical portions of the spiral ganglion project (a) to the dorso-medial and successively more ventro-lateral parts of the dorsal cochlear nucleus; (b) to the anterior part of the ventral cochlear nucleus along the dorso-caudo-medial to ventro-rostro-lateral axis; and (c) to the posterior part of the ventral cochlear nucleus along the dorso-rostro-medial to ventro-caudo-lateral axis.
