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