Chapter 7 - Muscles of the Forearm and Hand

If a muscle crosses the wrist joint posteriorly, what will be its action upon the hand at the wrist joint? Select one: a. Extension Correct b. Flexion c. Radial deviation (abduction) d. Ulnar deviation (adduction)

a

In what position is the brachioradialis most effective as a flexor of the forearm at the elbow joint? Select one: a. When the forearm is halfway between full pronation and full supination at the radioulnar joints Correct b. When the forearm is in full supination at the radioulnar joints c. When the forearm is in full pronation at the radioulnar joints d. None of the above

a

Of the three muscles of the hypothenar eminence group, which one is located most superficially? Select one: a. Abductor digiti minimi manus Correct b. Flexor digiti minimi manus c. Opponens digiti minimi d. Fourth dorsal interosseus

a

The forearm extensor compartment has how many layers? Select one: a. Two Correct b. Three c. Four d. Five

a

What are the attachments of the abductor pollicis longus? Select one: a. Posterior radius and ulna to the thumb Correct b. Middle anterior fibula to the dorsal surface of the big toe (toe number one) c. Middle anterior fibula to the lateral surface of the big toe (toe number one) d. Anterior radius and ulna to the thumb

a

What are the attachments of the brachioradialis? Select one: a. Lateral supracondylar ridge of the humerus to the styloid process of the radius Correct b. Medial supracondylar ridge of the humerus to the styloid process of the ulna c. Medial epicondyle of the humerus (via the common flexor tendon) to the radial hand on the anterior side d. Lateral epicondyle of the humerus to the styloid process of the radius

a

What are the attachments of the dorsal interossei manus? Select one: a. Metacarpals of fingers one through five to the proximal phalanges of fingers two, three, and four, on the side away from the center of the middle finger Correct b. Distal tendons of the flexor digitorum profundus to the distal tendons of the extensor digitorum (the dorsal digital expansion) c. Metacarpals of fingers two, four, and five to the proximal phalanges of fingers two, four, and five on the "middle finger side" d. Third metacarpal to the thumb

a

What are the attachments of the extensor pollicis longus? Select one: a. Posterior ulna to the thumb Correct b. Lateral epicondyle of the humerus (via the common extensor tendon) to the thumb c. Medial epicondyle of the humerus (via the common extensor tendon) to the thumb d. Anterior ulna to the thumb

a

What are the attachments of the flexor digitorum superficialis? Select one: a. Medial epicondyle of the humerus (via the common flexor tendon) and the anterior ulna and radius to the anterior surfaces of fingers two through five Correct b. Lateral epicondyle of the humerus (via the common extensor tendon) and the posterior ulna and radius to the posterior surfaces of fingers two through five c. Lateral supracondylar ridge of the humerus to the anterior surfaces of fingers two through five d. Medial epicondyle of the humerus (via the common flexor tendon) and the lateral epicondyle of the humerus (via the common extensor tendon) to the anterior surfaces of fingers two through five

a

What are the attachments of the opponens digiti minimi? Select one: a. Flexor retinaculum and the hamate to the metacarpal of the little finger Correct b. Hamate to the proximal phalanx of the little finger c. Flexor retinaculum and the hamate to the proximal phalanx of the little finger d. Hamate to the distal phalanx of the little finger

a

What are the attachments of the opponens pollicis? Select one: a. Flexor retinaculum and the trapezium to the metacarpal of the thumb Correct b. Flexor retinaculum and the trapezium to the proximal phalanx of the thumb c. Extensor retinaculum and the trapezium to the distal phalanx of the thumb d. Extensor retinaculum and the trapezium to the proximal phalanx of the thumb

a

What are the terms used to describe irritation and/or inflammation of the lateral epicondyle of the humerus and/or the common extensor tendon? Select one: a. Lateral epicondylitis, lateral epicondylosis, or tennis elbow Correct b. Lateral epicondylitis, lateral epicondylosis, or golfer's elbow c. Medial epicondylitis, medial epicondylosis, or pitcher's shoulder d. Medial epicondylitis, medial epicondylosis, or golfer's elbow

a

What three muscles form the borders of the anatomic snuffbox? Select one: a. Abductor pollicis longus, extensor pollicis brevis, and extensor pollicis longus Correct b. Abductor pollicis longus, extensor pollicis longus, and flexor digitorum superficialis c. Extensor carpi radialis longus, extensor carpi radialis brevis, and extensor pollicis brevis d. Flexor carpi radialis, palmaris longus, and flexor carpi ulnaris

a

When palpating the flexors digitorum superficialis and profundus, where is the flexor digitorum profundus located relative to the flexor digitorum superficialis? Select one: a. Posterior and closer to the shaft of the ulna Correct b. Anterior and closer to the shaft of the ulna c. Anterior and farther from the shaft of the ulna d. Posterior and farther from the shaft of the ulna

a

Which muscle of the thenar eminence group is the most superficial? Select one: a. Abductor pollicis brevis Correct b. Flexor pollicis brevis c. Opponens pollicis d. None of the above; they are all equally superficial.

a

Which muscles radially deviate (abduct) the hand at the wrist joint? Select one: a. Flexor carpi radialis, extensor carpi radialis longus, and extensor carpi radialis brevis Correct b. Flexor carpi radialis, flexor carpi ulnaris, and palmaris longus c. Flexor carpi ulnaris and extensor carpi ulnaris d. Extensor carpi ulnaris, extensor carpi radialis longus, and extensor carpi radialis brevis

a

Which of the following muscles attach to the medial epicondyle of the humerus via the common flexor tendon? Select one: a. Pronator teres, flexor carpi radialis, and palmaris longus Correct b. Pronator quadratus, palmaris longus, and flexor carpi ulnaris c. Extensor carpi radialis longus, extensor carpi radialis brevis, and extensor carpi ulnaris d. Pronator teres, flexor digitorum superficialis, and flexor digitorum profundus

a

If a muscle crosses the wrist joint anteriorly, what will be its action upon the hand at the wrist joint? Select one: a. Extension b. Flexion Correct c. Radial deviation (abduction) d. Ulnar deviation (adduction)

b

Muscles that move the fingers are usually divided into what two groups? Select one: a. Internal and external b. Intrinsic and extrinsic Correct c. Inferior and superior d. Interdigital and extradigital

b

Tenosynovitis of what two muscles causes deQuervain's disease? Select one: a. Abductor pollicis longus and extensor pollicis longus b. Abductor pollicis longus and extensor pollicis brevis Correct c. Extensor pollicis longus and extensor indicis d. Abductor pollicis longus and abductor pollicis brevis

b

The forearm flexor compartment has how many layers? Select one: a. Two b. Three Correct c. Four d. Five

b

The majority of the thumb web of the hand is made up of what two muscles? Select one: a. Flexor pollicis brevis and abductor pollicis brevis b. Adductor pollicis and first dorsal interosseus Correct c. First lumbrical manus and the flexor pollicis brevis d. Opponens pollicis and abductor pollicis brevis

b

What are the attachments of the abductor digiti minimi manus? Select one: a. Flexor retinaculum and the pisiform to the metacarpal of the little finger b. Pisiform to the proximal phalanx of the little finger Correct c. Flexor retinaculum and the pisiform to the proximal phalanx of the little finger d. Pisiform to the distal phalanx of the little finger

b

What are the attachments of the abductor pollicis brevis? Select one: a. Flexor retinaculum, scaphoid, and trapezium to the metacarpal of the thumb b. Flexor retinaculum, scaphoid, and trapezium to the proximal phalanx of the thumb Correct c. Flexor retinaculum, scaphoid, and trapezium to the distal phalanx of the thumb d. Extensor retinaculum, scaphoid, and trapezium to the proximal phalanx of the thumb

b

What are the attachments of the extensor digiti minimi? Select one: a. Lateral epicondyle of the humerus (via the common extensor tendon) to the phalanges of fingers two through five b. Lateral epicondyle of the humerus (via the common extensor tendon) to the phalanx of the little finger Correct c. Medial epicondyle of the humerus (via the common extensor tendon) to the phalanx of the little finger d. Dorsal surface of the calcaneus to the dorsal surface of the phalanx of the little toe

b

What are the attachments of the extensor digitorum? Select one: a. Posterior radius and ulna to the lateral epicondyle of the humerus (via the common extensor tendon) to the phalanges of fingers two through five b. Lateral epicondyle of the humerus (via the common extensor tendon) to the phalanges of fingers two through five Correct c. Lateral epicondyle of the humerus (via the common extensor tendon) to the phalanges of fingers one through five d. Medial epicondyle of the humerus (via the common flexor tendon) to the phalanges of fingers two through five

b

What are the attachments of the extensor pollicis brevis? Select one: a. Anterior radius to the thumb b. Posterior radius to the thumb Correct c. Posterior ulna to the thumb d. Lateral epicondyle of the humerus (via the common extensor tendon) to the thumb

b

What are the attachments of the flexor pollicis brevis? Select one: a. Flexor retinaculum and the trapezium to the metacarpal of the thumb b. Flexor retinaculum and the trapezium to the proximal phalanx of the thumb Correct c. Flexor retinaculum and the trapezium to the distal phalanx of the thumb d. Extensor retinaculum and the trapezium to the proximal phalanx of the thumb

b

What are the attachments of the flexor pollicis longus? Select one: a. Distal posterior fibula to the plantar surface of the big toe (toe number one) b. Anterior surface of the radius to the thumb Correct c. Lateral epicondyle of the humerus (via the common flexor tendon) to the posterior surface of the thumb d. Anterior surface of the ulna to the thumb

b

What are the attachments of the lumbricals manus? Select one: a. Metacarpals of fingers one through five to the proximal phalanges of fingers two, three, and four, on the side away from the center of the middle finger b. Distal tendons of the flexor digitorum profundus to the distal tendons of the extensor digitorum (the dorsal digital expansion) Correct c. Metacarpals of fingers two, four, and five to the proximal phalanges of fingers two, four, and five on the "middle finger side" d. Third metacarpal to the thumb

b

What are the attachments of the pronator teres? Select one: a. Lateral supracondylar ridge of the humerus to the styloid process of the radius b. Medial epicondyle of the humerus (via the common flexor tendon) and the coronoid process of the ulna to the lateral radius Correct c. Lateral epicondyle of the humerus (via the common extensor tendon) and the ulnar tuberosity to the lateral radius d. Medial epicondyle of the humerus (via the common flexor tendon) and the coronoid process of the ulna to the radial hand on the anterior side

b

What nerve innervates the abductor digiti minimi manus, flexor digiti minimi manus, and opponens digiti minimi? Select one: a. Median b. Ulnar Correct c. Radial d. Axillary

b

Which of the following conditions, commonly described as irritation of the lateral epicondyle and/or common extensor tendon, should a therapist consider when treating the extensor digitorum and extensor digiti minimi? Select one: a. Medial epicondylitis b. Lateral epicondylitis Correct c. Carpal tunnel syndrome d. Thoracic outlet syndrome

b

Which of the following muscles "points" the index finger? Select one: a. Extensor digiti minimi b. Extensor indicis Correct c. Extensor digitorum longus d. Extensor digitorum

b

Which of the following muscles originate at the lateral epicondyle of the humerus via the common extensor tendon? Select one: a. Flexor carpi radialis and flexor carpi ulnaris b. Extensor carpi radialis longus, extensor carpi radialis brevis, and extensor carpi ulnaris Correct c. Extensor carpi radialis brevis and extensor carpi ulnaris d. Pronator teres and pronator quadratus

b

Forearm muscles are usually divided into which of the following groups? Select one: a. Radial compartment and ulnar compartment b. Medial movers and lateral stabilizers c. Interior flexor compartment and posterior extensor compartment Correct d. Proximal supinators and distal pronators

c

If a muscle crosses the wrist joint laterally (radially), what will be its action upon the hand at the wrist joint? Select one: a. Extension b. Flexion c. Radial deviation (abduction) Correct d. Ulnar deviation (adduction)

c

In what position should the forearm be placed when palpating the pronator teres? Select one: a. Flexed and fully pronated b. Extended and fully supinated c. Flexed and halfway between full supination and full pronation Correct d. Extended and halfway between full supination and full pronation

c

The muscles of the wrist extensor group are principally innervated by what nerve? Select one: a. Median b. Axillary c. Radial Correct d. Ulnar

c

What are the attachments of the extensor carpi radialis longus? Select one: a. Medial epicondyle of the humerus (via the common flexor tendon) to the radial hand on the anterior side b. Medial supracondylar ridge of the humerus to the radial hand on the posterior side c. Lateral supracondylar ridge of the humerus to the radial hand on the posterior side Correct d. Anterior ulna to the ulnar hand on the posterior side

c

What are the attachments of the extensor carpi ulnaris? Select one: a. Medial epicondyle of the humerus (via the common flexor tendon) and the ulna to the ulnar hand on the anterior side b. Lateral supracondylar ridge of the humerus to the radial hand on the posterior side c. Lateral epicondyle of the humerus (via the common extensor tendon) to the ulnar hand on the posterior side Correct d. Medial epicondyle of the humerus (via the common extensor tendon) to the ulnar hand on the posterior side

c

What are the attachments of the extensor indicis? Select one: a. Anterior ulna to the middle finger b. Posterior radius to the index finger c. Posterior ulna to the index finger Correct d. Anterior radius and ulna to the index finger

c

What are the attachments of the flexor digiti minimi manus? Select one: a. Flexor retinaculum and the hamate to the metacarpal of the little finger b. Hamate to the proximal phalanx of the little finger c. Flexor retinaculum and the hamate to the proximal phalanx of the little finger Correct d. Hamate to the distal phalanx of the little finger

c

What are the attachments of the flexor digitorum profundus? Select one: a. Anterior radius to the anterior surfaces of fingers two through five b. Middle posterior tibia to the plantar surface of toes two through five c. Medial and anterior ulna to the anterior surfaces of fingers two through five Correct d. Distal posterior fibula to the plantar surface of toes two through five

c

What are the attachments of the palmar interossei? Select one: a. Metacarpals of fingers one through five to the proximal phalanges of fingers two, three, and four, on the side away from the center of the middle finger b. Distal tendons of the flexor digitorum profundus to the distal tendons of the extensor digitorum (the dorsal digital expansion) c. Metacarpals of fingers two, four, and five to the proximal phalanges of fingers two, four, and five on the "middle finger side" Correct d. Third metacarpal to the thumb

c

What is the action of the palmaris brevis? Select one: a. Flexion of the hand at the wrist joint b. Flexion of the thumb at the carpometacarpal joint c. Wrinkles the skin of the palm Correct d. Extension of the fingers at the metacarpophalangeal joints

c

What muscle can both pronate and supinate the forearm at the radioulnar joints? Select one: a. Pronator teres b. Supinator c. Brachioradialis Correct d. Flexor carpi radialis

c

What nerve innervates the "deep distal four group" of muscles? Select one: a. Median b. Axillary c. Radial Correct d. Ulnar

c

What wrist joint action best engages all three muscles of the wrist flexor group? Select one: a. Extension b. Radial deviation c. Flexion Correct d. Ulnar deviation

c

Which nerve provides the principal innervation to the muscles of the central compartment of the hand? Select one: a. Median b. Radial c. Ulnar Correct d. Musculocutaneous

c

Which three muscles comprise the radial group of forearm muscles? Select one: a. Extensor carpi radialis longus, extensor carpi radialis brevis, and extensor carpi ulnaris b. Extensor carpi radialis longus, extensor carpi radialis brevis, and flexor carpi ulnaris c. Brachioradialis, extensor carpi radialis longus, and extensor carpi radialis brevis Correct d. Brachioradialis, brachialis, and biceps brachii

c

For which of the following muscles does the distal attachment become a fibrous expansion that covers the posterior, medial, and lateral sides of the proximal phalanx? Select one: a. Extensor carpi ulnaris b. Flexor digitorum superficialis c. Extensor digiti minimi d. Extensor digitorum

d

If a muscle crosses the wrist joint medially (on the ulnar side), what will be its action upon the hand at the wrist joint? Select one: a. Extension b. Flexion c. Radial deviation (abduction) d. Ulnar deviation (adduction)

d

Overuse of what muscle group can cause irritation and/or inflammation of the medial epicondyle and common flexor tendon resulting in golfer's elbow? Select one: a. Wrist flexor b. Pronator teres c. Wrist extensor d. Both a and b Correct

d

The distal attachments of what muscle spread out to become the dorsal digital expansion of fingers two through five of the hand? Select one: a. Flexor digitorum superficialis b. Flexor digitorum profundus c. Extensor digitorum longus d. Extensor digitorum

d

What are the attachments of the adductor pollicis? Select one: a. Metacarpals of fingers one through five to the proximal phalanges of fingers two, three, and four, on the side away from the center of the middle finger b. Distal tendons of the flexor digitorum profundus to the distal tendons of the extensor digitorum (the dorsal digital expansion) c. Metacarpals of fingers two, four, and five to the proximal phalanges of fingers two, four, and five on the "middle finger side" d. Third metacarpal to the thumb

d

What are the attachments of the pronator quadratus? Select one: a. Medial epicondyle of the humerus (via the common flexor tendon) and the coronoid process of the ulna to the lateral radius b. Anterior proximal ulna to the anterior proximal radius c. Posterior distal ulna to the anterior distal radius d. Anterior distal ulna to the anterior distal radius

d

What are the terms used to describe irritation and/or inflammation of the medial epicondyle of the humerus and/or the common flexor tendon? Select one: a. Lateral epicondylitis, lateral epicondylosis, or tennis elbow b. Lateral epicondylitis, lateral epicondylosis, or golfer's elbow c. Medial epicondylitis, medial epicondylosis, or pitcher's shoulder d. Medial epicondylitis, medial epicondylosis, or golfer's elbow

d

What are the three muscles of the wrist extensor group? Select one: a. Flexor carpi radialis, flexor carpi ulnaris, and palmaris longus b. Brachioradialis, extensor carpi radialis longus, and extensor carpi radialis brevis c. Extensor carpi radialis longus, extensor carpi radialis brevis, and extensor digitorum d. Extensor carpi radialis longus, extensor carpi radialis brevis, and extensor carpi ulnaris Correct

d

Which are the attachments of the supinator? Select one: a. Lateral supracondylar ridge of the humerus to the styloid process of the radius b. Medial epicondyle of the humerus (via the common flexor tendon) and the coronoid process of the ulna to the lateral radius c. Medial epicondyle of the humerus and the proximal radius to the proximal 1/3 of the ulna d. Lateral epicondyle of the humerus and the proximal ulna to the proximal 1/3 of the radius

d