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The cochlear nuclear complex is the first integrative, or processing, stage in the auditory system. [4] Information is brought to the nuclei from the ipsilateral cochlea via the cochlear nerve. [5] Several tasks are performed in the cochlear nuclei.
The ventral cochlear nucleus is divided into the anterior ventral (anteroventral) cochlear nucleus (AVCN) and the posterior ventral (posteroventral) cochlear nucleus (PVCN). In the VCN, auditory nerve fibers bifurcate, the ascending branch innervates the AVCN and the descending branch innervates the PVCN and then continue to the dorsal cochlear ...
The dorsal cochlear nucleus (DCN, also known as the "tuberculum acusticum") is a cortex-like structure on the dorso-lateral surface of the brainstem.Along with the ventral cochlear nucleus (VCN), it forms the cochlear nucleus (CN), where all auditory nerve fibers from the cochlea form their first synapses.
the dorsal cochlear nucleus (DCN) the anteroventral cochlear nucleus (AVCN) the posteroventral cochlear nucleus (PVCN) Each of the three cochlear nuclei are organized to sort sound according to a specific spacial arrangement. As such, sound frequencies detected by the cochlea are transmitted electrically to specific positions in the cochlear ...
Thus, the LSO receives excitatory input from the ipsilateral ear and inhibitory input from the contralateral ear. This is the basis of ILD sensitivity. Projections from both cochlear nuclei are primarily high frequency, and these frequencies are subsequently represented by the majority of LSO neurons (>2/3 over 2–3 kHz in cat).
The spiral (cochlear) ganglion is a group of neuron cell bodies in the modiolus, the conical central axis of the cochlea. These bipolar neurons innervate the hair cells of the organ of Corti. They project their axons to the ventral and dorsal cochlear nuclei as the cochlear nerve, a branch of the vestibulocochlear nerve (CN VIII).
Structural diagram of the cochlea showing how fluid pushed in at the oval window moves, deflects the cochlear partition, and bulges back out at the round window. The cochlea ( pl. : cochleae) is a spiraled, hollow, conical chamber of bone, in which waves propagate from the base (near the middle ear and the oval window ) to the apex (the top or ...
The superior olivary complex (SOC), in the pons, is the first convergence of the left and right cochlear pulses. SOC has 14 described nuclei; their abbreviation are used here (see Superior olivary complex for their full names). MSO determines the angle the sound came from by measuring time differences in left and right info.
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