What happens if the inferior colliculus is damaged?

The inferior colliculus (IC), a complex neural circuit in the auditory brainstem, plays an important role in sound processing. Damage to the IC inhibitory circuitry likely contributes to different hearing disorders including tinnitus and hyperacusis[[1], [6]].

What are the inferior colliculus responsible for?

The inferior colliculus is a part of the midbrain that serves as a main auditory (sound) center for the body. It acts as the channel for almost all auditory signals in the human body. It also processes sensory signals from the superior colliculi, located above it.

What happens when the superior colliculus is damaged?

Lesion of the LEFT superior colliculus results in inability to turn head reflexively to the RIGHT (CONTRA.) upon visual (or somatosensory and auditory) stimuli on the RIGHT. Other Note: Superior colliculus is also involved in the control of eye movements.

What is the Brachium of inferior colliculus?

The brachium of the inferior colliculus (BIC) constitutes the last relay in the auditory pathway between the primary cochlear nuclei and the metathalamus (medial geniculate body).

What are the superior and inferior colliculus responsible for?

The superior colliculus is a layered, multi-sensory structure. Its upper layer receives visual signals from the retina of the eye, while the lower layers process multiple signals from various other parts of the brain. Movement of the eyes is also connected with the cells present in the lower layers of the colliculus.

What is superior and inferior colliculi?

The superior colliculus is a synaptic layered structure. The two superior colliculi sit below the thalamus and surround the pineal gland in the mammalian midbrain. The superior colliculi are larger than the inferior colliculi, though the inferior colliculi are more prominent.

Is the inferior colliculus white matter?

Anatomical terms of neuroanatomy The commissure of inferior colliculus, also called the commissure of inferior colliculi is a thin white matter structure consisting of myelinated axons of neurons and joining together the paired inferior colliculi.

What is the inferior and superior Colliculi?

structures’ have quite different functions. The inferior colliculus is part of the auditory pathways and is involved in processing both ascending and descending information about sound. In con- trast, the superficial portions of the superior colliculus are devoted to visual processing and are organized retinotopically.

What structure is the superior and inferior colliculus associated with?

The superior colliculus is connected with the lateral geniculate nucleus for reflex (Fig. 4.45), while the inferior colliculus is connected with the medial geniculate nucleus for auditory pathway (Fig. 3.52).

Do humans have a superior colliculus?

There are two superior colliculi in the midbrain. They are symmetrically positioned, one on either side of the midline of the brainstem; they form two bumps on the posterior external surface of the brainstem. The superior colliculus is often referred to as the tectum or optic tectum in non-human vertebrates.

Is the midbrain GREY or white matter?

The midbrain represents the uppermost portion of the brainstem, containing numerous important nuclei and white matter tracts, most of which are involved in motor control, as well as the auditory and visual pathways.

What is the function of the inferior colliculus?

The Inferior Colliculus Inferior colliculus. The Inferior colliculus is the main midbrain nucleus and important structure of the auditory passage. It is not just a point on the way up. It is a receiver of essential information from various sources, and processing this information. Auditory signals

How does the inferior colliculus relay auditory information?

The central nucleus also extends neuronal fibers to the medial geniculate nucleus of the thalamus, another important nucleus in the auditory pathway. From there, information travels to the cerebral cortex. Thus, the inferior colliculus acts as an important relay station for auditory information.

Where does gray matter connect to the inferior colliculus?

A range of brain stem nuclei — collections of neurons, or gray matter — connect to the inferior colliculus. All of them attach to the core nucleus bilaterally (at both lobes) with the exception of the lateral lemniscus, a bundle of sensory nerve fibers that comes from the cochlear nucleus of the brain stem.

Where does sound synapse with the inferior colliculus?

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 orienting data. Sound location data thus becomes fully integrated by the inferior colliculus.

What happens if the inferior colliculus is damaged? The inferior colliculus (IC), a complex neural circuit in the auditory brainstem, plays an important role in sound processing. Damage to the IC inhibitory circuitry likely contributes to different hearing disorders including tinnitus and hyperacusis[[1], [6]]. What are the inferior colliculus responsible for? The inferior colliculus is…