Abstract
The origin of the efferent innervation of the cochlea was investigated by retrograde axonal transport of intracochlear administered horseradish peroxydase solution (HRP). Frontal frozen sections of the brain stem were reacted for the demonstration of HRP. Labeled neurons were found bilaterally in the superior olivary complex, especially in the ipsilateral lateral superior olivary nucleus (LSO) and in the ventral nucleus of the trapezoid body (VTB) contralaterally. Moreover, extraolivary origin of the efferent innervation of the cochlea could be demonstrated in the ventral nucleus of the lateral lemniscus (VLL) bilaterally.
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