What is the function of superior colliculi?

The superior colliculus (SC) is a multisensory midbrain structure that integrates visual, auditory, and somatosensory spatial information to initiate orienting movements of the eyes and head toward salient objects in space.

What are the functions of colliculi?

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. Its primary roles are signal integration, frequency recognition, and pitch discrimination.

What is the function of the superior and inferior colliculi?

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.

Do humans have 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.

What is the function of superior?

in the analytic psychology of Carl Jung , the function among the four basic functions—seeing, thinking, intuiting, and feeling—that rules the conscious ego and dominates the other three, which become inferior functions in the unconscious. The superior function determines the functional type of the individual.

What does the pulvinar nucleus do?

The pulvinar nucleus of the thalamus, for example, is involved in filtering or suppressing irrelevant stimuli in a cluttered display. However, the cortical region that plays the most significant role in the control of spatial attention is the posterior parietal region.

What is the red nucleus?

The red nucleus is a large structure located centrally within the tegmentum that is involved in the coordination of sensorimotor information. Crossed fibres of the superior cerebellar peduncle (the major output system of the cerebellum) surround and partially terminate in the red nucleus.

What happens if the inferior colliculus is damaged?

Introduction. 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 happens if the superior colliculus is damaged?

Direct damage to the superior colliculus has been tested in rhesus monkeys as well as rats and has resulted in clinical manifestations. Researchers found that the monkeys with damage to the superior colliculus to have visual deficits as well as impairments in gaze shifts.

What is the function of superior vena cava?

The superior vena cava carries blood from the head, neck, arms, and chest. The inferior vena cava carries blood from the legs, feet, and organs in the abdomen and pelvis. The vena cava is the largest vein in the body.

Where does the pulvinar nucleus project?

thalamus
The pulvinar nuclei or nuclei of the pulvinar (nuclei pulvinares) are the nuclei (cell bodies of neurons) located in the thalamus (a part of the vertebrate brain). As a group they make up the collection called the pulvinar of the thalamus (pulvinar thalami), usually just called the pulvinar.

What does the lateral geniculate nucleus do?

The lateral geniculate nucleus is a multilayered structure that receives input from both eyes to build a representation of the contralateral visual hemifield.

What is the function of the superior colliculus?

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.

Are there any nuclei in the inferior colliculus?

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.

Where does the brachium of the superior colliculus end?

The brachium of superior colliculus (or superior brachium) is a branch that extends laterally from the superior colliculus, and, passing between the pulvinar and medial geniculate body, is partly continued into an eminence called the lateral geniculate body, and partly into the optic tract.

Which is the superior colliculus of the midbrain?

Superior colliculus. The superior colliculus refers to the rostral (front) bump on the lateral (side) part of the midbrain. It is, in fact, a pair of two colliculi, superior and inferior, on either side of the midbrain that together constitute the tectum.