Question

Trochlear nerve goes to
A. Superior oblique muscles
B. Posterior rectus
C. Inferior rectus
D. Inferior oblique

Answer 1

Hint: Trochlear nerve controls the intorsion and abduction of the eye. It is responsible for the eye movement when it works with the oculomotor (III) and abducens (VI) nuclei. It is one of the ocular motor nerves.

Complete answer:
A nerve that emerges dorsally from the brain is known as the trochlear nerve. It is also known as cranial nerve IV. It is a type of motor nerve that innervates the superior oblique muscle of the eye. The movement of the eyeball is controlled by this nerve. Injury to the trochlear nerve causes weakness to the downward movement of the eye which results in double vision or vertical diplopia. It is also known as the muscle of oculomotor. It is the smallest cranial nerve that has the longest intracranial course because it is the only nerve that exits from the dorsal side of the brain. This nerve originates from the midbrain and then extends laterally and anteriorly into the superior oblique muscles. It is a somatic efferent nerve.

Additional information: A nerve is a specialized cell that transmits impulses in the form of electrical or chemical signals. It is the major component of the nervous system.

Hence, the correct answer is option A.

Note: Trochlear nerve is the homolog of the ventral roots of the spinal nerve. The trochlear nerve originates from the posterior part of the midbrain. This part is developed from the mesencephalon. The trochlear nerve has a motor nucleus. This nerve is located near the midline along the medial longitudinal fasciculus.