Eye Muscles and Their Functions

The video tutorial focuses on the muscles controlling eye movement, specifically the six extrinsic muscles. It explains the difference between extrinsic and intrinsic muscles, describes the orbital cavity structure, and details the functions of rectus and oblique muscles. The tutorial concludes with a summary of the key points discussed.

What is the primary focus of the video?

• The muscles that control eye movement

• The anatomy of the human brain

• The function of the digestive system

• The structure of the human heart

How many extrinsic muscles control eye movement?

• Four

• Six

• Eight

• Ten

What is the main difference between extrinsic and intrinsic eye muscles?

• Intrinsic muscles are larger than extrinsic muscles

• Intrinsic muscles control eye movement, extrinsic control pupil dilation

• Extrinsic muscles are under conscious control, intrinsic are not

• Extrinsic muscles are inside the eye, intrinsic are outside

Which muscle helps you look upward?

• Inferior rectus

• Lateral rectus

• Superior rectus

• Medial rectus

Where do most of the eye muscles originate?

• On the floor of the maxilla

• From the lateral wall of the orbit

• From the annulus of Zinn

• From the cranial cavity

Which muscle does not originate from the annulus of Zinn?

• Superior rectus

• Inferior rectus

• Inferior oblique

• Medial rectus

What is the function of the superior oblique muscle?

• To look up and in

• To look up and out

• To look down and in

• To look down and out

Which muscle helps you look up and out?

• Superior oblique

• Inferior oblique

• Lateral rectus

• Medial rectus

What is the role of the trochlea in eye movement?

• It controls the dilation of the pupil

• It acts as an anchor for the superior oblique muscle

• It helps in the movement of the inferior rectus

• It is the origin point for all eye muscles

What is the main action of the inferior oblique muscle?

• To look up and in

• To look down and in

• To look up and out

• To look down and out