What is the function of the trochlear nerve quizlet?

What is the function of the trochlear nerve quizlet?

The trochlear Nerve controls muscles that directs vision downward and and rotates the eyeball toward the nose.

What is the main function of CN V?

The trigeminal nerve is the fifth cranial nerve (CN V). Its primary function is to provide sensory and motor innervation to the face. The trigeminal nerve consists of three branches on either side that extend to different territories of the face.

What muscles are innervated by the trochlear nerve?

The only muscle the trochlear nerve innervates, the superior oblique muscle, is the longest and thinnest muscle among the extraocular muscles.

Where is the trochlear nerve?

The trochlear nerve emerges from the back (dorsal) brainstem, just below the inferior colliculus. It circles from behind around the brainstem and runs forward toward the eye in the subarachnoid space.

What does the Abducens nerve control?

Cranial nerve six (CN VI), also known as the abducens nerve, is one of the nerves responsible for the extraocular motor functions of the eye, along with the oculomotor nerve (CN III) and the trochlear nerve (CN IV).

What is the function of sensory fibers of the Abducens nerves quizlet?

The abducens nerve carries motor impulses to the lateral rectus eye muscle which moves the eye laterally causing abduction of the eye.

Why is the trochlear nerve unique?

The trochlear nerve is unique among the cranial nerves in several respects: It is the smallest nerve in terms of the number of axons it contains. It has the greatest intracranial length. It is the only cranial nerve that exits from the dorsal (rear) aspect of the brainstem.

Is Trochlear sensory or motor?

The trochlear, abducens, accessory, and hypoglossal nerves are only motor nerves; the trigeminal nerve is both sensory and motor; the oculomotor nerve is both motor and parasympathetic; the facial glossopharyngeal, and vagus nerves have sensory, motor, and parasympathetic components (Standring, 2008).

Why is trochlear nerve called pathetic nerve?

It is the only cranial nerve that exits from the dorsal (rear) aspect of the brainstem. It innervates a muscle, the superior oblique muscle, on the opposite side (contralateral) from its nucleus….

Is trochlear nerve parasympathetic?

The parasympathetic portion of this nerve can be seen superficially on the medial side of cranial nerve III. The trochlear nerve supplies motor innervation to the dorsal oblique muscle of the contralateral side from its cell bodies of origin. This muscle is responsible for inward turning of the eyeball.