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