Practice Quiz - Forearm & Wrist (questions from previous quizzes and exams)
Practice Quiz - Forearm & Wrist
Below are written questions from previous quizzes and exams
1. 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
2. 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
3. The anterior interosseous is a branch of which nerve?
Axillary
Median
Musculocutaneous
Radial
Ulnar
4. 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
5. 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
6. Interruption of the median nerve in the cubital fossa affects what movement(s) of the thumb?
Flexion
Opposition
Both
Neither
7. 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
8. Structures within the carpal tunnel include the:
Radial bursa
Ulnar bursa
Both
Neither
9. 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
10. 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
11. 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
12. 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
13. 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
14. 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
15. 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
16. 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
17. Development of "tennis elbow" (lateral epicondylitis) involves the origin of which muscle?
Abductor pollicis longus
Anconeus
Brachioradialis
Extensor carpi radialis brevis
Triceps brachii
18. 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
19. 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
20. When falling on an outstretched hand, the most commonly dislocated carpal bone is the:
Scaphoid
Trapezoid
Lunate
Capitate
Hamate
21. 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
22. 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
23. 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
24. 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
25. 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
26. 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
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