Ch 7 The Wrist and Hand Joints

Which of the following is the insertion of the extensor carpi radialis longus?

base of 2nd metacarpal

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

base of 5th metacarpal

Which of the following muscles performs flexion of the thumb?

c. flexor pollicis longus

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

true

Muscles that are considered to be wrist extensors include the extensor carpi radialis longus, extensor carpi radialis brevis, and extensor carpi radialis.

false

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

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

medial epicondyle of the humerus

Motions of the finger metacarpophalangeal joints include flexion, extension, abduction, and adduction.

true

The [x1] has the following attachments- origin: posterior aspect of the radius and midshaft of the ulna; insertion: base of the first metacarpal on the dorsal lateral surface.

Abductor Pollicis Longus Muscle

The [x1] has the following attachments- origin: medial epicondyle of the humerus, medial coronoid process, upper two-thirds of the anterior border of the radius just distal to the radial tuberosity; insertion: each tendon splits and attaches to the sides of the middle phalanx of the four fingers on the palmar surface.

Flexor digitorum superficialis

The primary movements of the flexor carpi radialis at the wrist are flexion and [x1].

abduction

The primary movements of the flexor pollicis longus include flexion of the the wrist, metacarpophalangeal, and interphalangeal joints, as well as wrist [x1].

abduction

[x1] is the common action of the flexor digitorum superficialis at the wrist, metacarpophalangeal, and interphalangeal joints.

flexion

The [x1] has the following attachments- origin: medial epicondyle of the humerus and the posterior aspect of the proximal ulna; insertion: base of the fifth metacarpal (palmar surface), pisiform, and hamate.

flexor carpi ulnaris

Which of the following muscles performs adduction of the wrist?

flexor carpi ulnaris

The [x1] has the following attachments- origin: middle anterior surface of the radius and anterior medial border of the ulna just distal to the coronoid process; insertion: base of the distal phalanx of the thumb on the palmar surface.

flexor pollicis longus

The wrist joint moves through the ____ plane about the _____ axis with ulnar and deviation.

frontal, sagittal

Which of the following is the origin of the palmaris longus?

medial epicondyle of the humerus

The only muscle involved in extending all of the metacarpophalangeal and interphalangeal joints of the four fingers is the extensor digitorum.

true

Each finger has three interphalangeal joints while the thumb is has only two.

false

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

false

The [x1] has the following attachments- origin: medial epicondyle of the humerus; insertion: palmar aponeurosis of the second, third, fourth, and fifth metacarpals.

palmaris longus

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

False

The wrist joint is classified as a [x1] joint.

ellipsoid

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

extensor carpi radialis longus

The [x1] has the following attachments- origin: middle to distal one-third of the posterior ulna; insertion: base of the middle and distal phalanxes of the second phalange on the dorsal side.

extensor indicis

Muscles that are considered to be wrist flexors include the flexor carpi radialis, flexor carpi ulnaris, and palmaris longus.

true

The interphalangeal joints may be actively flexed to a greater degree with the wrist in slight extension as opposed to full flexion.

true

Ulnar flexion is movement of little finger side of hand toward medial aspect or ulnar side of the forearm.

true

Motions of the finger metacarpophalangeal joints include flexion, extension, abduction, and adduction.

TRUE

Normally, the wrist has more adduction range of motion than abduction range of motion.

a. proximal 3/4ths of the anterior and medial ulna

Movement of the little finger side of the hand toward the medial aspect or ulnar side of the forearm is termed [x1].

adduction

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

base of distal phalanxes of the four fingers

Which of the following is the insertion of the extensor carpi radialis brevis?

c. base of 3rd metacarpal

Which of the following muscles has its origin on the lateral epicondyle of the humerus?

c. extensor digitorum

The movements of the abductor pollicis longus include abduction and [x1] of the thumb at the carpometacarpal joint, and weak wrist extension.

extension

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

Opposition is movement of the thumb across palmar aspect to oppose any or all of the phalanges.

true