Clinical testing extraocular muscles tutorial

This tutorial explains the clinical testing of extraocular muscles, focusing on the medial and lateral rectus, superior rectus and inferior oblique, and superior oblique and inferior rectus muscles. It details how to isolate each muscle for testing by aligning the vector pull with the gaze of the orbit, using actions like abduction and adduction of the eye. The tutorial also highlights the associated cranial nerves tested during these procedures.

Which cranial nerve is tested when assessing the function of the medial rectus muscle?

• Cranial nerve 3

• Cranial nerve 6

• Cranial nerve 2

• Cranial nerve 4

To isolate the superior rectus muscle for testing, what action should the patient perform?

• Close the eye

• Look down

• Abduct the eye

• Adduct the eye

When the inferior oblique muscle is isolated, on which axis does it act?

• W axis

• Y axis

• Z axis

• X axis

What is the primary action of the superior oblique muscle when isolated?

• Elevate the eye

• Depress the eye

• Adduct the eye

• Abduct the eye

How is the inferior rectus muscle isolated for clinical testing?

• By abducting the eye first

• By looking up

• By adducting the eye first

• By closing the eye