Fig. 2.

Nerve fibers from the cochlea end in the brainstem. Some of the nerve fibers project to the ipsilateral superior olivary nucleus and some of the fibers decussate to the contralateral superior olivary complex. Thereafter, the majority of the fibers travel ipsilaterally to the inferior colliculus and the rest to the contralateral inferior colliculus. From the ipsilateral inferior colliculus, the nerve fibers project to the medial geniculate nucleus in the thalamus and finally to the primary auditory cortex.