kines quiz 2
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 joint stability t/f?
true
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 a. supinator muscle b. pronator teres muscle c. triceps brachii muscle d. anconeus muscle
anconeus muscle
tightening a screw with a screwdriver using the right hand depends significantly upon the action of the a. triceps brachii b. brachioradialis c. biceps brachialis d. supinator
biceps brachialis
elbow stability is locked when at full ___ and unlocked at ____ a. extension, 20 degrees flexion b. extension, 45 degree flexion c. flexion, 45 degrees extension d. none are correct
extension, 20 degrees flexion
in the anatomical position the radius is more medial than the ulna t/f?
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 t/f?
false
the elbow includes all of the following ligaments except the___ a. ulnar collateral ligament b. radial collateral ligament c. interosseus ligament d. annular ligament
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? a. palmaris longus b. flexor carpi ulnaris c. flexor pollicis longus d. extensor carpi radialis longus
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 the palm down position? a. extension b. flexion c. supination d. pronation
pronation
flexion of the elbow occurs in the ___ plane of motion, and supination of the forearm occurs in the _____ plane of motion a. coronal; vertical b. sagittal; transverse c. vertical; sagittal d. sagittal; frontal
sagittal; transverse
of the carpal bones, which articulates with the radius and is critical in transferring force from the hand into the forearm? a. scaphoid b. lunate c. triquetrum d. pisiform
scaphoid
the most commonly injured ligament in the elbow due to throwing is the a. ulnar collateral ligament b. annular ligament c. radial collateral ligament d. radioulnar ligament
ulnar collateral ligament
carpal tunnel syndrome is a condition in which there is an increased pressure in the carpal tunnel, which interferes with the normal function of the median nerve t/f?
true
elbow motions primarily involve movement between the articular surfaces of the humerus and the ulna t/f?
true
in the context of wrist and hand movements, dorsiflexion refers to the movement of the back and of the hand toward the posterior or dorsal aspect of the forearm t/f?
true
in the context of 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 t/f?
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 of ulnar side of the forearm t/f?
true
medial epicondylitis is frequently referred to as "golfers elbow" t/f?
true
movements of the wrist joint include flexion, extension, abduction and adduction t/f?
true
positioning the forearm in pronation decreases the effectiveness of the biceps brachii muscle in flexing the elbow t/f?
true
the ulna is much larger proximally than the radius t/f?
true
the ulnar collateral ligament is critical to providing medial support to prevent the elbow from abducting when stressed in physical activity t/f?
true
the wrist flexor muscles have their origin on the medial epicondyle of the humerus t/f?
true
