Anatomy | The Extrinsic Eye Muscles [Functions & Innervation]

The video tutorial provides an in-depth look at the extrinsic eye muscles, which are six voluntary skeletal muscles responsible for eye movement. It explains the distinction between rectus and oblique muscles, their functions, and how they are controlled by cranial nerves. The tutorial also covers how to differentiate between the left and right eye using these muscles and discusses the specific roles of cranial nerves in controlling eye movement.

What are the extrinsic eye muscles primarily responsible for?

• Focusing on distant objects

• Rotating the eye in its socket

• Producing tears

• Blinking the eyes

How can you determine if an eye is left or right using the oblique muscles?

• By the direction the oblique muscles run

• By the color of the iris

• By the size of the pupil

• By the shape of the eyelid

Which muscle is responsible for moving the eye medially?

• Lateral rectus muscle

• Superior oblique muscle

• Medial rectus muscle

• Inferior oblique muscle

What is the primary function of the lateral rectus muscle?

• To move the eye medially

• To move the eye upwards

• To move the eye laterally

• To move the eye downwards

Which muscle elevates the eye and turns it laterally?

• Lateral rectus muscle

• Inferior oblique muscle

• Medial rectus muscle

• Superior rectus muscle

Which cranial nerve controls the superior oblique muscle?

• Cranial nerve 3

• Cranial nerve 4

• Cranial nerve 5

• Cranial nerve 6

What type of nerves are the cranial nerves controlling the extrinsic eye muscles?

• Autonomic nerves

• Mixed nerves

• Motor nerves

• Sensory nerves