Question

Eye muscles are innervated by:
A. Oculomotor, abducens and vagus
B. Oculomotor, trochlear, and abducens
C. Oculomotor, abducens and facial
D. Oculomotor, facial and vagus

Answer 1

Hint:
The eye is one of the sensory organs of the body. The structure of the eye is an important subject to understand as it is one of the significant sensory organs in the human body. It is primarily responsible for vision, differentiation of colour (the human eye can distinguish about 10 – 12 million colours), and maintaining the biological clock of the human body.

Complete answer:
Ocular mobility is an essential feature of the eyes that help individuals collect as much visual input as possible. Movement of the eyes is performed by six extraocular muscles. They enable the eyes to move around in two principal planes and also about the visual axis. The nerve supply of these muscles is provided by three cranial nerves such as the oculomotor (CN III), trochlear (CN IV), and abducens (CN VI) nerves. While the oculomotor nerve supplies most of the extraocular muscles, the abducens and trochlear nerves each supply their own muscle. The abducens nerve (cranial nerve VI) leaves the brainstem from the pons-medullary junction and innervates the lateral rectus muscle. These three cranial nerves regulate the size of the pupil and the position of the eyeball.

Option ‘B’ is correct

Note:
A human eye is around 2.3 cm in diameter and is nearly a spherical ball filled with a little fluid. The eyes are organs of the sensory system that offer a vision to animals, energy to gather and filter visual detail, and also stimulate a specific photo response function that is independent of vision. The eyes observe light and adapt it into electrochemical impulses in neurons.