Exam 1 answers

All of the following muscles are capable of externally (laterally) rotating the shoulder at the glenohumeral joint

Infraspinatus, posterior deltoid, teres minor

TorF: The brachialis is deep to the biceps brachii tendon at the elbow.

True

The primary concentric action of the dorsal interossei is to

abduct the fingers

What are the CONCENTRIC ACTIONS of the muscle that has its proximal attachment (origin) on the medial half of the clavicle, the sternum, and the cartilages of upper eight ribs, and its distal attachment (insertion) on the humerus next to the distal attachment (insertion) of the latisimus dorsi?

adduction, horizontal adduction, internal (medial) rotation and assists with flexion of the humerus

The shoulder most often dislocates in the _____ direction

anterior

The muscle that has its proximal attachment (origin) on the superglenoid tuberacle and also on the corocoid process of the scapula

biceps brachii

Which muscle does NOT have an attachment on the ulna? a. triceps brachii b. pronator quadratus c. biceps brachii d. brachialis

biceps brachii

All of the following muscles flex the wrist EXCEPT a. flexor carpi radialis b. flexor digitorum c. flexor carpi ulnaris d. brachioradialis

brachioradialis

The muscle that has its proximal attachment (origin) on the lateral supracondlyar ridge and its distal attachment (insertion) on the styloid process of the radius is the

brachioradialis

Which muscles will abduct one or more digits of the hand?

dorsal interossi, abductor digiti minimi, adductor pollicis brevis

The action of the extensor digiti minimi

extends and abducts the fifth digit

The PRIMARY CONCENTRIC ACTION of the muscle that has its distal attachment (insertion) on the olecranon process is

extension of the elbow

What muscle has its distal attachment (insertion) on the dorsal base of the fifth metacarpal of the hand and and its proximal attachment (origin) on the lateral epicondyle of the humerus?

extensor carpi ulnaris

Which of the following is NOT a member of the superficial extensor forearm muscle group? a. extensor digitorum b. extensor carpi radialis longus c. extensor indici d. extensor carpi ulnaris

extensor indici

The PRIMARY CONCENTRIC ACTION of the muscle that has its proximal attachment (origin) on the lower half of the anterior shaft of the humerus and its distal attachment (insertion) on the coronoid process and tuberosity of the ulna is

flexion of the elbow

Which muscles perform abduction (radial deviation) of the wrist?

flexor carpi radialis, extensor carpi radialis longus, extensor carpi radialis brevis

This muscle's distal attachment (insertion) is primarily on the pisiform bone, plus with ligaments to the hamate and base of the 5th metacarpal

flexor carpi ulnaris

Which flexor muscle does not have a proximal attachment (origin) on either epicondyle of the humerus?

flexor digitorum profundus

Which structure keeps the flexor tendons in place and forms one of the boundaries the "carpal tunnel"?

flexor retinaculum

The extensor muscles of the wrist have their proximal attachments (origins) on or near the

lateral epicondyle of the humerus

Which muscles are part of the force couple that work together to downward rotate the scapula or rotate the glenoid fossa downward?

levator scapulae and rhomboids

The joint between the proximal and distal row of carpals is the

midcarpal

How many metacarpals does the thumb have?

one

Which 4 muscles make up the thenar eminence?

opponens pollicis abductor pollicis brevis flexor pollicis brevis adductor pollicis

Which muscle's primary action is to stabilize the scapula by drawing it inferiorly and anteriorly against the thoracic wall (tilts scapula anteriorly) which may also entrap the brachial plexus nerves?

pectoralis minor

What muscle has its proximal attachment (origin) immediately above the medial epicondyle of the humerus, on the coronoid process of the ulna, and the common flexor tendon?

pronator teres

Extension of the shoulder at the glenohumeral joint takes place in which plane?

sagittal

The most often fractured carpal bone is the

scaphiod

What is the PRIMARY CONCENTRIC ACTION of the muscle that has its proximal attachment (origin) on the occiput, ligamentum nuchae, and the spinous process of C7 and its distal attachment (insertion) on the clavicle, scapular spine and acromium process?

scapular elevation

The pronator teres is a member of which forearm muscle group?

superficial flexor pronator mass

The distal attachment (insertion) of the levator scapulae, which has its proximal attachment (origin) on the transverse processes of C1-C4 is the

superior medial angle of the scapula

Which motion occurs at the proximal radioulnar joint?

supination

Name the 4 members of the rotator cuff

suprapinatus, infraspinatus, teres minor, subscapularis

Name the muscle that has its proximal attachment (origin) on the supraspinous fossa

supraspinatus

Which muscle has its proximal attachment (origin) on the lower lateral border and inferior angle of the scapula

teres major

Which muscle will not flex the MCP's and extend the PIP's of the 2,3, and 4 digits

thenar muscles

The carpal bone found at the base of the thumb is the

trapezium

The artery which enters the hand on the little finger side of the wrist is the

ulnar

The ligament that is injured that requires "Tommy John" surgery is the

ulnar collateral ligament

Which muscles are part of the force couple that work together to rotate the glenoid fossa superiorly, a motion also known as upward rotation of the scapula?

upper and lower trapezius