OT Anatomy & Physiology 2

Question 1

Which rotator cuff muscle is most commonly torn in overhead occupational tasks?

Accepted Answer

Supraspinatus

Answer

The supraspinatus tendon passes under the acromion and is most vulnerable to impingement and tearing during overhead activities.

Question 2

The brachial plexus originates from which spinal cord levels?

Accepted Answer

C5–T1

Answer

The brachial plexus is formed from the ventral rami of spinal nerves C5 through T1, innervating the upper extremity.

Question 3

Which carpal bone is most frequently fractured in a fall on an outstretched hand (FOOSH)?

Accepted Answer

Scaphoid

Answer

The scaphoid is fractured in about 70% of carpal fractures due to its position bridging the proximal and distal carpal rows during FOOSH impact.

Question 4

Which nerve is compressed in pronator teres syndrome, producing forearm pain and median nerve symptoms?

Accepted Answer

Median nerve

Answer

Pronator teres syndrome involves compression of the median nerve between the two heads of the pronator teres muscle in the proximal forearm.

Question 5

The interossei muscles of the hand are primarily innervated by which nerve?

Accepted Answer

Ulnar nerve

Answer

Both the palmar and dorsal interossei are innervated by the deep branch of the ulnar nerve (C8–T1).

OT - Master of Occupational Therapy Practice Test