EXS 310 Exam 3
The extensor digiti minimi is innervated by the radial nerve (C6-C8)
TTrue
Which of the following is the insertion of the extensor carpi radialis brevis?
The base of the third metacarpal on the dorsal surface
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
True
The extensor carpi ulnaris and the flexor carpi ulnaris are the only two muscles involved in ulnar deviation (adduction)
True
The extensor digitorum is the only muscle involved in extension of all four fingers
True
The flexor digitorum superficialis and the flexor digitorum profundus are finger flexors, and the flexor pollicis longus is a thumb flexor
True
The insertion of the biceps brachii muscle is on the radial tuberosity
True
The pronator teres originates from the distal part of the medial supracondylar ridge of the humerus and the medial side of the proximal ulna
True
The ulnar collateral ligament is critical to providing medial support to prevent the elbow from abducting when stressed in physical activity
True
The actions of the brachioradialis muscle include all of the following except:
Weak flexion of the shoulder joint
The long head of the triceps brachii originates from the:
Infraglenoid tubercle of the scapula
List all eight carpal bones
Scaphoid Lunate Triquetrum Pisiform Trapezium Trapezoid Capitate Hamate
One head of the biceps brachii muscle originates from the supraglenoid tubercle of the scapula
True
The pronator teres is innervated by the median nerve (C6, C7)
True
The triceps brachii muscle inserts on the olecranon process of the ulna
True
Positioning the forearm in pronation decreases the effectiveness of the biceps brachii
True
To stretch the flexor carpi ulnas, the elbow must be fully extended with the forearm supinated while a partner passively extends and abducts the wrist
True
A movement of the forearm away from the shoulder is best described by the term "flexion"
False
Each finger has three interphalangeal joints, whereas the thumb only has two
False
In the context of wrist and hand movements, radial flexion (abduction) refers to the movement of the thumb side of the hand toward the medial aspect or the ulnar side of the forearm
False
The elbow is a hinge-type joint that allows only internal and external rotations
False
The insertion of the brachialis muscle is on the coracoid process of the radius
False
The insertion of the brachioradialis is on the styloid process of the ulna
False
The lateral supracondylar ridge is an anatomical landmark located on the ulna
False
Which of the following muscles performs adduction of the wrist?
Flexor carpi ulnaris
Which of the following is the only muscle that flexes the finger distal interphalangeal joint (DIP) joints?
Flexor digitorum profundus
Which of the following muscles does not perform wrist extension?
Flexor pollicis longus
Which of the following muscles performs flexion of the thumb?
Flexor pollicis longus
Which of the following is an action of the biceps brachii?
Horizontal adduction of the shoulder joint
Which of the following is the insertion of the flexor digitorum profundus?
The base of the distal phalanges of the four fingers
Which of the following is the insertion of the extensor carpi ulnaris?
The base of the fifth metacarpal on the dorsal surface
The flexor pollicis longus inserts on the base of the distal phalanx of the thumb on the palmar surface
True
The three wrist flexors, from medial to lateral, are the flexor carpi ulnaris, palmaris longus, and flexor carpi radialis
True
The wrist flexor muscles have their origin on the medial epicondyle of the humerus
True
Wrist joint actions include flexion, extension, abduction (radial flexion), and adduction (ulnar flexion)
True
Which of the following muscles performs abduction of the thumb?
Abductor pollicis longus
Which of the following muscles performs actions in the frontal plane?
Abductor pollicis longus
Radioulnar supination is performed by all of the following muscles except the:
Anconeus
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
Which of the following is a posterior upper extremity muscle?
Anconeus
Radioulnar pronation is performed by all of the following muscles except the:
Brachialis
Which of the following elbow flexors acts in "true flexion of the elbow"?
Brachialis
Which of the following muscles is involved in both pronation and supination?
Brachioradialis
Which of the following is the primary function of the extensor digiti minimi?
Extension of the little finger at the metacarpophalangeal joint
Which of the following is the primary function of the extensor pollicis longus?
Extension of the thumb
Which of the following muscles performs abduction of the wrist?
Extensor carpi radialis longus
Which of the following muscles inserts on the four tendons to bases of middle and distal phalanges of the four fingers on the dorsal surface?
Extensor digitorum
Which of the following muscles originates on the lateral epicondyle of the humerus?
Extensor digitorum
Which of the following is the "pointing muscle" that originates between middle and distal one-third of the posterior ulna?
Extensor indicis
The supinator originates from the:
Lateral epicondyle of the humerus and neighboring posterior part of the ulna
Which of the following is the origin of the flexor carpi radialis muscle?
Medial epicondyle of the humerus
Which of the following is the origin of the palmaris longus?
Medial epicondyle of the humerus
The pronator teres inserts on the:
Middle third of the lateral surface of the radius
Which muscle below does not perform flexion of the elbow?
Pronator quadratus
The radial nerve innervates all of the following muscles except:
Pronator teres
Which of the following is the origin of the flexor digitorum profundus?
Proximal three-fourths of the anterior and medial ulna
Flexion of the elbow occurs in the ____ plane of motion, and supination of the forearm occurs in the ____ plane of motion
Sagittal; transverse
In the context of radioulnar joint movements, which of the following terms refers to the external rotary movement of the radius on the ulna that results in the hand moving from the palm-down to the palm-up position?
Supination
Which of the following is the insertion of the extensor carpi radialis longus?
The base of the second metacarpal on the dorsal surface
Provide a strengthening activity for the following muscles: Triceps brachii Flexor carpi radialis or flexor carpi ulnaris Flexor digitorum superficialis or flexor digitorum profundus
Triceps brachii - dips on a parallel bar Flexor carpi radialis or flexor carpi ulnaris - wrist curls against resistance Flexor digitorum superficialis or flexor digitorum profundus - squeezing a spongy ball in the palm of your hand
Carpel tunnel syndrome is a condition in which there is an increased pressure in the carpel tunnel, which interferes with the normal function of the median nerve
True
In the context of wrist and hand movements, opposition refers to the movement of the thumb across the palmar aspect to oppose any or all of the phalanges
True
