Readers ask: What Are The Pontine Nuclei?

The pontine nuclei (PN) are the largest of the precerebellar nuclei, neuronal assemblies in the hindbrain providing principal input to the cerebellum. The PN are predominantly innervated by the cerebral cortex and project as mossy fibers to the cerebellar hemispheres.

What are the nuclei of the pons?

Trigeminal nerve nuclei located in the pons include the sensory nucleus, mesencephalic nucleus, and main motor nucleus. The sensory nucleus, mesencephalic tract nucleus, and motor nucleus of the trigeminal nerve are situated at the pons.

What are the pontine fibers?

The fibres that give the pons its name are efferent fibres running across the midline from the pontine nuclei to the central part of the cerebellar cortex. Fibres from the cerebral cortex travel to the pontine nuclei in the corticopontine tracts, passing through the internal capsule on their way to the pons.

What happens if the pontine nuclei is damaged?

Isolated chemical lesions of the cat pontine nuclei produced long-lasting deficits in learned reaching movements to a visual target. It is plausible that damage to the corticopontine pathway may be responsible for the ataxia occurring together with hemiparesis in some patients with supratentorial infarction.

What is the Pontine?

Listen to pronunciation. (PON-teen) Having to do with the pons (part of the central nervous system, located at the base of the brain, between the medulla oblongata and the midbrain). Enlarge.

What are the 3 functions of the pons?

The pons powers the functions of the head and face The brainstem is made up of three sections, and carries vital information to the body. The pons relays information about motor function, sensation, eye movement, hearing, taste, and more.

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What are medullary nuclei?

The medullary nucleus of the solitary tract (NTS) is the first relay station for the arterial baroreceptors and chemoreceptors, as well as cardiopulmonary and gastrointestinal afferents. The NTS integrates multiple autonomic reflexes and projects to other central autonomic regions.

What is the pons function?

The pons, while involved in the regulation of functions carried out by the cranial nerves it houses, works together with the medulla oblongata to serve an especially critical role in generating the respiratory rhythm of breathing. Active functioning of the pons may also be fundamental to rapid eye movement (REM) sleep.

What are cranial nerve nuclei?

The cranial nerve nuclei are a series of bilateral grey matter motor and sensory nuclei located in the midbrain, pons and medulla that are the collections of afferent and efferent cell bodies for many of the cranial nerves. Some nuclei are small and contribute to a single cranial nerve, such as some of th motor nuclei.

Is the pons white or gray matter?

The gray matter forms the nuclei of the cranial nerves, autonomic nuclei, olivary nuclei, nuclei of the pons and cerebellum, red nuclei, substantia nigra, nuclei of the corpora quadrigemina, and reticular formation.

What is the function of the pontine nuclei?

The pontine nuclei (PN) are the largest of the precerebellar nuclei, neuronal assemblies in the hindbrain providing principal input to the cerebellum. The PN are predominantly innervated by the cerebral cortex and project as mossy fibers to the cerebellar hemispheres.

Where is the pontine nucleus located?

The pontine nuclei are located in the ventral pons. Corticopontine fibres carry information from the primary motor cortex to the ipsilateral pontine nucleus in the ventral pons, and the pontocerebellar projection then carries that information to the contralateral cerebellum via the middle cerebellar peduncle.

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What is the purpose of the hindbrain?

The hindbrain coordinates functions that are fundamental to survival, including respiratory rhythm, motor activity, sleep, and wakefulness. It is one of the three major developmental divisions of the brain; the other two are the midbrain and forebrain.

What is the pontine level?

The pons is in the brainstem situated between the midbrain and the medulla oblongata, and in front of the cerebellum. A separating groove between the pons and the medulla is the inferior pontine sulcus. Most of it appears as a broad anterior bulge above the medulla.

Why is the pons important?

Pons is an essential part of the brain located above the medulla. It falls in the category of the hindbrain. Pons is very important part of brain for the regulation and control of a number of vital functions. It not only acts as a control center, but also contains nuclei of some important cranial nerves.

What is this cerebrum?

(seh-REE-brum) The largest part of the brain. It is divided into two hemispheres, or halves, called the cerebral hemispheres. Areas within the cerebrum control muscle functions and also control speech, thought, emotions, reading, writing, and learning.