Supination of the hand and forearm would be diminished by loss of radial nerve function. But
one very powerful supinator would remain intact and unaffected, namely:
Brachialis Brachioradialis Biceps brachii Flexor carpi radialis Supinator
A worker doing repetitive lifting develops an inflammation in the tendon of origin of the extensor
carpi radialis brevis muscle, commonly called "tennis elbow". The focal point of pain would most
likely be near which palpable bony landmark?
Coronoid process of ulna Lateral epicondyle of humerus Lateral supracondylar ridge of humerus Medial epicondyle of humerus Medial supracondylar ridge of humerus Olecranon Posterior (subcutaneous) border of ulna
The anterior interosseous is a branch of which nerve?
Axillary Median Musculocutaneous Radial Ulnar
In an attempt to commit suicide by slashing the ventral side of the wrist, the two tendons of the flexor digitorum superficialis located most superficially were completely severed. What movement would be affected?
Flexion of the MP and IP joints of the thumb Flexion of the PIP joints of digits 2 and 5 Flexion of the PIP joints of digits 3 and 4 Flexion of the DIP joints of digits 2 and 5 Flexion of the DIP joints of digits 3 and 4
What muscle is innervated by branches of both the median and ulnar nerves?
Flexor carpi ulnaris Flexor digitorum profundus Flexor digitorum superficialis Flexor pollicis longus Pronator quadratus
Interruption of the median nerve in the cubital fossa affects what movement(s) of the thumb?
Flexion Opposition Both Neither
Compression of the median nerve in the carpal tunnel affects which hand muscle(s)?
Dorsal interossei Flexor pollicis brevis Flexor pollicis longus Opponens digiti minimi Palmar interossei
Structures within the carpal tunnel include the:
Radial bursa Ulnar bursa Both Neither
A patient is severely limited in extension at the wrist joint after several months in a cast following a Colles fracture. Which joint would be especially important in therapy to regain full extension?
carpometacarpal distal radioulnar midcarpal radiocarpal ulnocarpal
The victim of multiple shrapnel wounds to the upper limb must have his forearm amputated at midlength. Because of concomitant damage in the patient's arm, the surgeon must ligate the main artery at some point. The best chance of saving collateral circulation to the stump of the forearm would be when the ligature is placed just below which of the following?
Beginning of brachial artery Origin of the deep brachial artery Origin of the superior ulnar collateral artery Origin of the inferior ulnar collateral artery Bifurcation of the brachial artery
During an industrial accident, a sheet metal worker lacerates the anterior surface of his wrist at the junction of his wrist and hand. Examination reveals no loss of hand function, but the skin on the thumb side of his palm is numb. Branches of which nerve must have been severed?
Lateral antebrachial cutaneous Medial antebrachial cutaneous Median Radial Ulnar
A middle-aged woman comes to you complaining of pain on the lateral side of her right elbow, so severe that she holds her eating utensils in her left hand to eat. She says that she spent the weekend putting in a new garden plot and that it involved loosening and turning over a large area of grass sods with a garden fork. You find that the region just proximal to the lateral epicondyle of her humerus is painful to the touch. There is no sensory loss in her forearm or hand. You suspect a localized tearing of the origin of a muscle producing the equivalent of "tennis elbow." The muscle most likely involved is the:
brachioradialis common flexor tendon extensor carpi radialis brevis extensor digitorum pronator teres
A boy fell onto a sharp object and cut his deep radial nerve as it emerged from the supinator muscle. The artery joining it at this point was also injured. The injured artery is the:
anterior interosseous common interosseous posterior interosseous radial ulnar
While going up for a rebound, a basketball player jams her middle finger against the ball. She experiences severe pain and the trainer notes that she can no longer extend the distal phalanx of the finger. The injury has avulsed (torn away from the bone) which structure from her distal phalanx to produce this condition?
extensor carpi radialis brevis tendon extensor carpi radialis longus tendon extensor digiti minimi tendon extensor expansion extensor indicis tendon
The tendons on the dorsal side of the wrist are held in place by a thickening of the antebrachial fascia called the:
bicipital aponeurosis extensor expansion extensor retinaculum interosseous membrane palmar carpal ligament
The function of the posterior interosseous nerve is:
motor to the brachioradialis motor to the extensor carpi ulnaris parasympathetic to the dorsum of the forearm sensory from the wrist joint sensory from the dorsum of the forearm
Development of "tennis elbow" (lateral epicondylitis) involves the origin of which muscle?
Abductor pollicis longus Anconeus Brachioradialis Extensor carpi radialis brevis Triceps brachii
In an industrial accident, the artery passing lateral to the pisiform bone is cut. This artery is the
Deep palmar arch Radial Superficial palmar arch Superficial palmar branch of the radial artery Ulnar
After suffering a gunshot wound to the forearm, it was determined that the posterior interosseous nerve was severed. What function was lost?
Sensory from the wrist joint Motor to brachioradialis Motor to the extensor carpi radialis longus Parasympathetic to the dorsum of the forearm Motor to the flexor digitorum superficialis
When falling on an outstretched hand, the most commonly dislocated carpal bone is the
Scaphoid Trapezoid Lunate Capitate Hamate
If the musculocutaneous nerve is severed at its origin from the brachial plexus, flexion at the elbow is greatly weakened but not abolished. What muscle remains operative and can contribute to flexion? Brachialis Brachioradialis Coracobrachialis Long head of biceps brachii Short head of biceps brachii
After falling on the ice, it was determined that a patient had a Colles' fracture. Care must be taken to relieve tension on the broken distal end of the radius created by the pull of which muscle?
Extensor carpi ulnaris Brachioradialis Extensor carpi radialis longus Pronator quadratus Extensor carpi radialis brevis
If the tendon of palmaris longus were transected, what movement would be affected?
Flexion of the MP and IP joints of the thumb Flexion of the proximal IP joints of digits 2 and 5 Flexion of the proximal IP joints of digits 3 and 4 Flexion of the wrist Extension of the wrist
What muscle is supplied by both the median and ulnar nerves?
Flexor carpi ulnaris Flexor digitorum profundus Flexor digitorum superficialis Flexor pollicis longus Pronator quadratus
The pulse of the radial artery at the wrist is felt immediately lateral to which tendon?
Abductor pollicis longus Extensor pollicis longus Flexor carpi radialis Flexor digitorum profundus Palmaris longus
If the medial epicondyle of the humerus is fractured and the nerve passing dorsal to it is injured, which muscle would be most affected?
Extensor carpi ulnaris Extensor digitorum Flexor carpi ulnaris Flexor digitorum profundus Flexor digitorum superficialis