Muscles for Test #2- Guess the muscle! Flashcards
O: Lateral epicondyle of humerus (via common flexor tendon)
I: Dorsal surfaces, base of middle & distal phalanges of fingers 2-5
A: Extension of 2nd-5th fingers
Extensor Digitorum Communis
O: Humeral head- medial epicondyle of humerus (common flexor tendon)
Ulnar head- proximal 2/3 of ulna
I: Pisiform, hamate, 5th metacarpal
A: Flexion and aDduction (ulnar deviation)
Flexor Carpi Ulnaris
O: Lateral epicondyle of humerus
I: Dorsal surface, base of third metacarpal
A: Wrist extension and radial deviation
Extensor Carpi Radialis Brevis
O: Anterior radius and interosseous membrane
I: Base of distal phalange of thumb
A: Flexion of thumb
Flexor Pollicis Longus
O: Medial epicondyle of humerus
I: Palmar aponeurosis and flexor retinaculum
A: Flexion of wrist, tension of palm
Palmaris Longus
O: Lateral supracondylar ridge of humerus
I: Lateral aspect of the base of the styloid process of the radius
A: Flexion of elbow, Supination (from full pronation to netural), Pronation (from full supination to neutral)
Brachioradialis
O: Posterior surface of radius and interosseous membrane
I: Proximal phalanx of thumb
A: Extension of MP joint of thumb (by continued action: extension of MCP joint of thumb, extension and radial deviation of wrist)
Extensor Pollicis Brevis
O: Proximal ¾ of ulna
I: Base of distal phalanges of fingers 2-5
A: Flexion of CM, MP, PIP, and DIP joint
Flexor Digitorum Profundus
O: Common Flexor tendon, coronoid process, radial shaft, ulnar collateral ligament
I: Base of middle phalanx of fingers 2-5 (splits to sides)
A: Flexion of CM, MP, PIP
Flexor Digitorum Superficialis
O: Lateral supracondylar ridge of humerus
I: Dorsal surface of base of second metacarpal
A: Wrist extension and radial deviation
Extensor Carpi Radialis Longus
O: Medial epicondyle of humerus (common flexor tendon)
I: Base of 2nd and 3rd metacarpals
A: Flexion and aBduction of wrist (radial deviation)
Flexor Carpi Radialis
O: Lateral epicondyle of humerus and dorsal aspect of the middle shaft of the ulna
I: Base of 5th metacarpal
A: Wrist extension and ulnar deviation
Extensor Carpi Ulnaris
O: Distal ulna
I: Distal radius
A: Pronation
Pronator Quadratis
O: Posterior surface of ulna and interosseous membrane
I: Distal phalanx of thumb
A: Extension of IP joint of thumb (by continued action: extension of MCP joint of thumb, extension and radial deviation of wrist)
Extensor Pollicis Longus
O: Humeral head- medial epicondyle of humerus
Ulnar head- Coronoid process of ulna
I: Middle of lateral surface of radius
A: Forearm pronation, elbow flexion
Pronator Teres
O: Lateral epicondyle of the humerus (posterior aspect)
I: Lateral aspect of Olecranon and proximal ulna
A: Extension of the elbow
Anconeus
O: Posterior surface of radius & ulna and interosseous membrane
I: Base of first metacarpal (radial side)
A: Thumb Abduction & extension
Abductor Pollicis Longus
O: Radial collateral Ligament, annular ligament, & supinator crest of the ulna
I: Lateral surface of proximal shaft of radius
A: Supinate the forearm
Supinator
Which muscles supinate?
Biceps brachii
Supinator
Brachioradialis (assists)
Which muscles pronate?
Pronator teres
Pronator quadratus
Brachioradialis
Which muscles extend the wrist?
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor carpi ulnaris
Extensor digitorum (assists)
Which muscles flex the wrist?
Flexor carpi radialis Flexor carpi ulnaris Palmaris Longus Flexor digitorum superficialis Flexor digitorum profundus (assists)
Which muscles abduct the wrist (radial deviation)?
Extensor carpi radialis longus
Extensor carpi radialis brevis
Flexor carpi radialis
Which muscles adduct the wrist (ulnar deviation)?
Extensor carpi ulnaris
Flexor carpi ulnaris
Which muscles flex the elbow?
Biceps brachii Brachialis Brachioradialis Flexor carpi radialis Flexor carpi ulnarius (assists) Palmaris longus Pronator teres (assists) Extensor carpi radialis longus (assists) Extensor carpi radialis brevis (assists)
Which muscles extend the elbow?
Triceps
Anconeous
Which muscles extend the 2nd-5th fingers?
Extensor digitorum
and others we haven’t learned
Which muscles flex the 2nd-5th fingers?
Flexor digitorum superficialis
Flexor digitorum profundus
(and others we haven’t learned)
Which muscles flex the thumb?
Flexor pollicis longus
and others we haven’t learned
Which muscles extend the thumb?
Extensor pollicis longus
Extensor pollicis brevis
Abductor pollicis longus
(and others we haven’t learned)
Which muscles do opposition of the thumb?
Flexor pollicis brevis (assists)
Abductor pollicis brevis (assists)
(and others we haven’t learned)
