Which cranial nerve exits the brain on the side of the frenulum of the superior cerebral velum?

It is called frenulum veli. On either side of frenulum veli, 4th cranial nerve (trochlear nerve) comes out of brainstem piercing superior medullary velum.

What is the function of superior medullary velum?

A slightly elevated ridge, the frenulum veli, descends upon its upper part from between the inferior colliculi, and on either side of this the trochlear nerve emerges. Blood is supplied by branches from the superior cerebellar artery….

What is inferior medullary velum?

The inferior medullary velum (posterior medullary velum) is a thin layer of white substance, prolonged from the white center of the cerebellum, above and on either side of the nodule; it forms the infero-posterior part of the fourth ventricle.

What structure forms inferior medullary velum?

The inferior (or posterior) medullary velum is a thin sheet of tissue formed by ependyma and the pia mater of the tela choroidea.

What is the medullary velum?

The superior (or anterior) medullary velum is a thin layer of tissue that is suspended between the superior cerebellar peduncles forming the roof of the fourth ventricle along with the inferior medullary velum. It is enclosed by pia mater dorsally and ependyma ventrally.

What is the difference between cerebellum and brainstem?

The key difference between brainstem and cerebellum is that brainstem is the region of the brain that connects the brain to the spinal cord, while the cerebellum is the middle part of the brain that helps in motor learning, motor coordination, and equilibrium.

What do the cerebellar peduncles do?

A cerebellar peduncle is a nerve tract that permits communication between the cerebellum and the other parts of the central nervous system. The inferior peduncles bring sensory information about the actual position of body parts such as limbs and joints.

What is medullary velum?

What is Tela Choroidea?

The tela choroidea is the thin, highly vascularized, loose connective tissue portion of pia mater that gives rise to the choroid plexus. Thus, it is basically the lamina propria of the ependyma and lies directly adherent to it, without any tissue in between the two 6.

What part of the brain controls smooth muscle?

Cerebellum
Cerebellum: The cerebellum, also known as the little brain, is responsible for smooth, coordinated voluntary movements.

How many types of efferent cerebellar pathways are there?

Connections of the cerebellum The inferior cerebellar peduncle contains four afferent tracts (posterior spinocerebellar, vestibulocerebellar, olivocerebellar and reticulocerebellar) and one efferent tract (the cerebellovestibular tract).

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