Forearm and palm

What is the movement of the thumb in the picture?

• thumb reposition

• thumb adduction

• thumb abduction

• thumb flexion

Which are the hypothenar muscles? (Choose more than one)

• Opponens pollicis

• Flexor digiti minimi brevis

• Opponens digiti minimi

• Flexor Digitorum Profundus

Which is NOT the main action of flexor digitorum superficialis?

• Wrist flexion

• Flex proximal phalanges at metacarpophalageal joint

• Flex middle phalanges at at proximal interphalangeal joint of middle 4 digits

• Forearm pronation

Answer explanation

Purple part: flexor+pronator compartment

Green part: extensor+supinator conpartment

Pronator syndrome (pain and tnderness in the proximal aspect of the anterior forearm, and hypesthesia of palmar aspect of the radial three and half digits) is caused by compression of which nerve?

• median nerve

• ulnar nerve

• radial nerve

• anterior interossei

Answer explanation

Purple part: flexor and pronator compartment

Green part: extensor and supinator compartment

Which nerve innervates pronator quadratus?

• posterior interosseous nerve from ulnar nerve

• anterior intersseous nerve from median nerve

• posterior intersseous nerve from radial nerve

• anterior intersseous nerve of ulnar nerve

Answer explanation

posterior interossesous: radial nerve

anterior interossesous: median nerve

Which nerve is most likely affected by riding long distance on a bike (i.e. handlebar neuropathy)?

• medial nerve

• musculocutaneous nerve

• radial nerve

• ulnar nerve

Answer explanation

handlebar neuropahy also called ulnar neuropathy

Which is NOT the insertion of Flexor Carpi Ulnaris

• Distal quarter of anterior surface of radius

• hamate hook

• pisiform

• 5th metacarpal

What is the possible synovial sheath/ tendon for number 4? (tranverse section near carpal tunnel)

• Abductor pollicus longus and extensor pollicis brevis

• Extensor carpi radialis longus and extensor carpi radialis brevis

• Extensor digitorum and extensor indicis

• Extensor digiti minimi

Answer explanation

Q. 

What is the possible synovial sheath/ tendon for number 2? (tranverse section near carpal tunnel)

• Abductor pollicis longus and extensor pollicis brevis

• Extensor carpi radialis longus and extensor carpi radialis brevis

• extensor digitorum and extensor indicis

• Extensor carpi ulnaris

Answer explanation

What is the joint type of first carpometacarpal joint?

• ball-and-socket

• condyloid

• hinge

• saddle