EXPH 2200: quiz 2

elbow motions primarily involve movement between the articular surfaces of the humerus and the ulna

true

in the context of wrist and hand movements, dorsiflexion refers to the movement of the back of the hand toward the posterior or dorsal aspect of the forearm

true

the ulna is much larger proximally than the radius

true

tightening a screw with a screwdriver using the right hand depends significantly upon the action of the

biceps brachialis

the chief function of the ____ is to pull the synovial membrane of the elbow joint out of the way of the advancing olecranon process during extension of the elbow

anconeus muscle

elbow stability is locked when at full ____ and unlocked at >____

extension, 20 degrees flexion

in the anatomical position, the radius is more medial than the ulna

false

in the context of wrist and hand movements, radial flexion refers to the movement of the thumb side of the hand toward the medial aspect or radial side of the forearm

false

the elbow includes all of the following ligaments except the

interosseus ligament

the carpal tunnel houses flexor tendons as well as the median nerve. what wrist flexor tendon does not pass through the carpal tunnel, making it an easy tendon to harvest and use during a UCL reconstruction surgery (it's absent in a small percentage of the population)

palmaris longus

in the context of radioulnar joint movements, which of the following terms refers to the internal rotary movement of the radius on the ulna that results in the hand moving from the palm up to palm down position

pronation

of the carpal bones, which articulates with the radius and is critical in transferring force from the hand into the forearm

scaphoid

the most commonly injured ligament in the elbow due to throwing is the __

ulnar collateral ligament

as the elbow reaches full extension, the olecranon process of the ulna is received by the olecranon fossa of the humerus, and this provides increased stability

true

carpal tunnel syndrome is a condition in which there in an increased pressure in the carpal tunnel, which interferes with the normal function of the median nerve

true

in the context of wrist and hand movements, ulnar flexion refers to the movement of the little finger side of the hand toward the medial aspect or ulnar side of the forearm

true

in the context or wrist and hand movements, opposition refers to the movement of the thumb across the palmar aspect to oppose the palm or any combination of the phalanges

true

medial epicondylitis is frequently referred to as "golfer's elbow"

true

movements of the wrist joint include flexion, extension, abduction and adduction

true

positioning the forearm in pronation decreases the effectiveness of the biceps brachii muscle, in flexing the elbow

true

the ulnar collateral ligament is critical to providing medial support to prevent the elbow from abducting when stressed in physical activity

true

the wrist flexor muscles have their origin on the medial epicondyle of the humerus

true