Question

Which of the following cranial nerves are involved in the movement of eye?

• A. Optic, occulomotor, abducens
• B. Occulomotor, abducens, trochlear
• C. Trochlear, abducens, optic
• D. Abducens, optic, trochlear, occulomotor

Answer 1

Answer: (B)

Occulomotor, abducens, trochlear

Cranial nerves that arise from the brain are called cranial nerves. Cranial nerves are 12 in pairs. Among them, 4 nerves are related to eyes.

a) Optic nerve: It starts from the retina of the eye. It is a sensory nerve and concerned with the sense of sight. It leads to the temporal lobe of the cerebral hemisphere.

b)Oculomotor nerve. It originates from the floor of the midbrain. It supplies to four eye muscles, ciliary muscles and tears glands. It is a motor nerve. It controls the movements of the eyeball.

c)Abducens nerve. It originates from the surface of the medulla oblongata. It supplies the external rectus muscles of the eyeball. It is a motor nerve, control the rotation of the eyeball.

d)Trochlear nerve. It arises from the floor of the midbrain. It supplies the superior oblique muscles of the eyeball. It is a motor nerve, leads rotation of the eye.

only oculomotor, abducens and trochlear nerve involved in the movement of the eye.

Thus, the correct answer is B.