Vestibulo-ocular Reflex (VOR) | Structure & Physiology

The video tutorial explains the vestibulo-ocular reflex (VOR), focusing on its mechanism and physiological basis. It involves cranial nerves III, IV, and VI, with a primary focus on the oculomotor and abducent nerves. The tutorial includes a practical exercise to demonstrate how head movements result in compensatory eye movements to maintain gaze. The physiological basis involves the vestibular apparatus in the inner ear, which detects head rotation and signals the appropriate eye muscles to contract. The video also discusses clinical applications and encourages practice.

Which cranial nerves are primarily involved in the vestibulo-ocular reflex?

• Cranial nerves 7 and 8

• Cranial nerves 1 and 2

• Cranial nerves 3 and 6

• Cranial nerves 4 and 5

What happens to your eyes when you rotate your head to the left?

• They remain stationary

• They rotate to the right

• They rotate downwards

• They rotate upwards

Which muscle is responsible for moving the left eye to the right during a left head rotation?

• Right medial rectus

• Left lateral rectus

• Right lateral rectus

• Left medial rectus

What is the role of the vestibular apparatus in the vestibulo-ocular reflex?

• It helps maintain balance and eye movement coordination

• It controls the movement of the neck

• It regulates blood pressure

• It detects sound waves

During a quick neck flexion, which muscles are primarily involved in moving the eyes?

• Superior rectus muscles

• Medial rectus muscles

• Inferior rectus muscles

• Lateral rectus muscles

If the head is rotated to the right, which muscles contract to move the eyes to the left?

• Right lateral rectus and left medial rectus

• Right medial rectus and left lateral rectus

• Both superior oblique muscles

• Both inferior oblique muscles

Which cranial nerve innervates the superior oblique muscle?

• Cranial nerve 4

• Cranial nerve 5

• Cranial nerve 6

• Cranial nerve 3