BCS 110 Lecture Notes - Lecture 14: Auditory Cortex, Auditory Scene Analysis, Cochlear Nucleus
29 Oct 2018
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The axons of each auditory nerve synapse in the cochlear nuclei on the same side (ipsilateral) From there, projections lead to the superior olives on both sides of the brain stem (binaural) Cochlear nuclei and superior olives -> inferior colliculi -> ipsilateral medial geniculate nuclei of the thalamus -> ipsilateral primary auditory cortex. Cochlea => cn (cochlear nuclei) => lso/mso => mntb (medial nucleus of trapezoidal body) =>inferior colliculi (left to right) => thalamus (mgn) => temporal lobe. Axons of each auditory nerve synapse in the cochlear nuclei in an ipsilateral fashion. Projections then lead to the superior olives binaural to the brain stem. Binaural mean - ipsilateral & sends to both sides of the brain. The auditory cortex is located in the temporal lobe. The auditory cortex includes a core (primary; a1 region) and up to 10 belt (secondary) regions. Each area appears to be organized on the basis of frequency (tonotopic)
