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The inferior colliculus has three subdivisions – the central nucleus, the dorsal cortex by which it is surrounded, and an external cortex which is located laterally. [1] The inferior colliculus is the first place where vertically orienting data from the fusiform cells in the dorsal cochlear nucleus can finally synapse with horizontally ...
It consists of groups of nerve cells-grey matter scattered in white matter. It basically connects the forebrain and the hind brain. It has four corpora quadrigemina which are the reflex centres of eye movement and auditory responses. The superior part of corpora quadrigemina are called superior colliculi, and inferior part as inferior colliculi ...
The colliculus as a whole is thought to help orient the head and eyes toward something seen and heard. [8] [34] [35] [36] The superior colliculus also receives auditory information from the inferior colliculus. This auditory information is integrated with the visual information already present to produce the ventriloquism effect.
This is similar to the dendritic organization of the IC, but with a different orientation. The dendrites of relay cells form a synaptic nest with ascending axons from the inferior colliculus and intrathalamic interneurons. In this synapse, relay cells are excited by input from the IC axons.
The corpora quadrigemina are four mounds, called colliculi, in two pairs – a superior and an inferior pair, on the surface of the tectum. The superior colliculi process some visual information, aid the decussation of several fibres of the optic nerve (some fibres remain ipsilateral), and are involved with saccadic eye movements .
The lateral lemniscus is a tract of axons in the brainstem that carries information about sound from the cochlear nucleus to various brainstem nuclei and ultimately the contralateral inferior colliculus of the midbrain. Three distinct, primarily inhibitory, cellular groups are located interspersed within these fibers, and are thus named the ...
The output is via the ipsilateral lateral lemniscus to the inferior colliculus. [6] The MSO responds better to binaural stimuli. The MSO's main function is detection of interaural time difference (ITD) cues to binaural lateralization. The MSO is severely disrupted in the autistic brain. [7]
Function. This small artery supplies the superior colliculus, inferior colliculus, and tectum of midbrain. References This page ...