Elbow, Radioulnar, Wrist, and Hand Joints Practice

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Which of the following is the primary function of the extensor digiti minimi muscle?

Extension of the little finger at the metacarpophalangeal joint

T/F: the elbow joint is a hinge-type joint that allows only internal and external rotations

False

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

False

The olecranon process is located on the medial aspect of the ulna.

False

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

Medial epicondyle of the humerus

Which of the following muscles does not perform wrist extension?

The abductor pollicis longus muscle

Which of the following muscles may not be palpated on the dorsal aspect of the hand?

The abductor pollicis longus muscle

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

The base of the fifth metacarpal on the dorsal surface

Which of these muscles may be palpated just proximal to the dorsal aspect of the wrist and approximately 1 cm medial to the radial styloid?

The extensor carpi radialis longus muscle

Which of the following muscles performs extension of the index finger at the metacarpophalangeal joint?

The extensor digiti minimi muscle

Which of the following muscles inserts on the four tendons to bases of middle and distal phalanges of the four fingers on the dorsal surface?

The extensor digitorum muscle

Which of the following is the only muscle that flexes the finger distal interphalangeal joint (DIP) joints?

The flexor digitorum profundus muscle

Which of the following muscles performs flexion of the thumb?

The flexor pollicis longus muscle

In the anatomical position, the tuberosity of the radius is in close proximity to the lateral side of the ulna.

True

In the context of wrist and hand movements, dorsiflexion refers to the movement of the back of the hand and/or the phalanges toward the posterior or dorsal aspect of the forearm.

True

T/F: Medial epicondylitis is frequently referred to as "golfers elbow"

True

T/F: The triceps brachia muscle inserts on the olecranon process of the ulna.

True

T/F: in the anatomical position, the tuberosity of the radius is in close proximity to the lateral side of the ulna

True

The flexor pollicis longus muscle inserts on the base of the distal phalanx of the thumb on the palmar surface.

True

The pronator teres muscle is innervated by the median nerve (C6, C7).

True

The pronator teres muscle originates from the distal part of the medial supracondylar ridge of the humerus and the medial side of the proximal ulna.

True

The triceps brachii muscle inserts on the olecranon process of the ulna.

True

Radioulnar supination is performed by all of the following muscles except the:

anconeus muscle

Radioulnar pronation is performed by all of the following muscles except the:

brachialis muscle.

Disruption of a tendon at or near the insertion of the _____ is known as a jersey or sweater finger and should be addressed surgically within approximately one week.

flexor digitorum profundus muscle

The anterior interosseous nerve that branches from the median nerve innervates the _____.

flexor pollicis longus muscle

The elbow includes all of the following ligaments except the:

interosseous ligament

The supinator muscle originates from the

lateral epicondyle of the humerus and neighboring posterior part of the radius

The _____ muscle does not perform flexion of the elbow.

pronator Quadratus

The actions of the brachioradialis muscle include all of the following except:

weak flexion of the shoulder joint

The actions of the brachioradialis muscle includes all of the following except:

weak flexion of the shoulder joint

The human wrist and hand have more than 30 muscles, of which 11 are intrinsic muscles.

False

The extensors of the wrist include, from lateral to medial, the extensor carpi radialis longus, extensor carpi radialis brevis, and extensor carpi ulnaris.

True

The ulnar collateral ligament is critical to providing medial support to prevent the elbow from abducting when stressed in physical activity.

True

The ulnar nerve provides sensation to the ulnar side of the hand, the ulnar half of the ring finger, and the entire little finger.

True

Which of the following is the sole action of the brachialis muscle?

True flexion of the elbow


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