Editing Inferior colliculus (section)

=== Input and output connections === 
The input connections to the inferior colliculus are composed of many brainstem nuclei. All nuclei except the contralateral ventral nucleus of the [[lateral lemniscus]] send projections to the central nucleus (CNIC) bilaterally. It has been shown that great majority of auditory fibers ascending in the lateral lemniscus terminate in the CNIC. In addition, the IC receives inputs from the auditory cortex, the medial division of the medial geniculate body, the posterior limitans, suprapeduncular nucleus and subparafascicular intralaminar nuclei of the thalamus, the substantia nigra pars compacta lateralis, the dorsolateral periaqueductal gray, the nucleus of the '''brachium of the inferior colliculus''' (or '''inferior brachium''') and deep layers of the superior colliculus. The inferior brachium carries auditory [[afferent nerve fiber|afferent fibers]] from the inferior colliculus of the [[mesencephalon]] to the [[medial geniculate nucleus]].<ref>Neuroanatomy 5th edition, Nolte.  Mosby 2002.</ref>

The inferior colliculus receives input from both the ipsilateral and contralateral cochlear nucleus and respectively the corresponding ears. There is some [[lateralization]], the dorsal projections (containing vertical data) only project to the contralateral inferior colliculus. This inferior colliculus contralateral to the ear it is receiving the most information from, then projects to its ipsilateral medial geniculate nucleus.

The inferior colliculus also receives descending inputs from the [[auditory cortex]] and auditory [[thalamus]] (or medial geniculate nucleus).<ref>{{cite book |last1=Schreiner |first1=Christoph |title=The inferior colliculus |date=2005 |publisher=Springer Science+ Business Media, Incorporated |url=https://scholar.google.com/scholar?hl=en&as_sdt=0%2C21&q=cortex+inferior+colliculus+winer&btnG=#d=gs_cit&u=%2Fscholar%3Fq%3Dinfo%3AHL5L0M0SLH8J%3Ascholar.google.com%2F%26output%3Dcite%26scirp%3D7%26hl%3Den}}</ref>

The medial geniculate body (MGB) is the output connection from inferior colliculus and the last subcortical way station. The MGB is composed of ventral, dorsal, and medial divisions, which are relatively similar in humans and other mammals. The ventral division receives auditory signals from the central nucleus of the IC.<ref>Gelfand, Stanley A.: ''Hearing, an Introduction to Psychological and Physiological Acoustics'', 4th Ed., Marcel Dekker, 2004, pp. 71-75.</ref>