The Wrist and Hand Joint Multiple Choice

Which of the following is the insertion of the extensor carpi ulnaris?

Base of 5th metacarpal

Which of the following muscles has its insertion on the four tendons to the bases of middle and distal phalanxes of the four fingers on the dorsal surface of the hand?

Extensor Digitorum

Which of the following muscles performs extension of the index finger?

Extensor Indicis

Radial flexion is movement of thumb side of hand toward medial aspect or radial side of forearm.

False

The extensor carpi radialis longus muscle can perform weak extension of the elbow when contracting concentrically.

False

The flexor digitorum superficialis performs its action in the frontal plane.

False

The flexor pollicis longus may be palpated on the posterior surface of the thumb.

False

All of the wrist flexor muscles generally have their origins located on the anteromedial aspect of the proximal forearm and the medial epicondyle of humerus.

True

The extensor carpi ulnaris and flexor carpi ulnaris are the prime movers in ulnar deviation.

True

Which of the following muscles performs abduction of the thumb?

abductor policis longus

Which of the following is the insertion of the flexor digitorum profundus?

base of distal phalanxes of the four fingers

Which of the following muscles performs abduction of the wrist?

extensor carpi radialis longus

Which of the following muscles flexes the distal interphalangeal joints of the fingers?

flexor digitorum profundus

Which of the following is the origin of the flexor carpi radialis?

medial epicondyle of the humerus

The muscles that are considered to be the agonists of phalangeal flexion include flexor digitorum superficialis, flexor digitorum profundus, and flexor pollicis longus.

True

Which of these muscles may be palpated just proximal to the dorsal aspect of the wrist?

extensor carpi radialis longus