Muscle Attachments Flashcards
Extensor Carpi Radialis Longus
Proximal:
- lateral epicondyle, lateral surpacondylar ridge of humerus
Distal:
- Dorsal base of 2nd metacarpal
(primary wrist)
Extensor Carpi Radialis Brevis
Proximal:
- Lateral epicondyle of humerus
Distal
- Dorsal base of 3rd metacarpal
(primary wrist)
Extensor Carpi Ulnaris
Proximal
- Lateral epicondyle of humerus
Distal
- Dorsal base of 5th metacarpal
(primary wrist)
Palmaris Longus
Proximal:
- Medial epicondyle of humerus
Distal
- Flexor reintaculum/Transverse carpal ligament, palmar aponeurosis
(primary wrist)
Flexor Carpi Radialis
Proximal:
- Medial epicondyle of humerus
Distal:
- Volar base of 2nd metacarpal
(primary wrist)
Flexor Carpi Ulnaris
Proximal:
- Medial epicondyle of humerus
Distal:
- Pisiform, hook of hamate, volar base of 5th metacarpal
(primary wrist)
Abductor Pollicis Longus
Proximal:
- Posterior middle ulna and radius, interosseous membrane
Distal:
- Lateral/radial base of metacarpal of thumb
(finger extrinsic muscle)
Extensor Pollicis Longus
Proximal:
- Middle posterior 1/3 ulna, interosseous membrane
Distal:
- Dorsal base of distal phalanx
(finger extrinsic muscle)
Extensor Pollicis Brevis
Proximal:
- Posterior radius, interosseous membrane
Distal
- Dorsal base of proximal phalanx of thumb
(finger extrinsic muscle)
Extensor Digitorum
Proximal:
- Lateral epicondyle
Distal:
- Along extensor mechanism of index, long, ring, small
1. ED to dorsal base proximal phalanx
2. Central slip to dorsal bode middle phalanx
3. terminal tendon to dorsal base distal phalanx
(finger extrinsic muscle)
Extensor Indicis
Proximal:
- Proximal part of lower 1/3 of ulna, interosseous membrane
Distal:
- Along extensor mechanism of index
1. EI to dorsal base proximal phalanx
2. Central slip to dorsal base middle phalanx
3. Terminal tendon to dorsal base distal phalanx
(finger extrinsic muscle)
Extensor Digit Minimi
Proximal:
- lateral epicondyle of humerus
Distal:
- Along extensor mechanism of small
1. EDM to dorsal bae proximal phalanx
2. Central slip to dorsal base proximal phalanx
3. Terminal tendon to dorsal base distal phalanx
(finger extrinsic muscle)
Flexor Pollicis Longus
Proximal:
- Middle 1/3 of anterior radius, interosseous membrane
Distal:
- Volar base of distal phalanx thumb
(finger extrinsic muscle)
Flexor Digitorum Superficialis
Proximal:
- Medial epicondyle of humerus, medial side coronoid process of ulna, oblique line of radius
Distal:
- Medial & lateral slips to volar bases of middle phalanges index, long, ring, small
(finger extrinsic muscle)
Flexor Digitorum Profundus
Proximal:
- Proximal 2/3 of anterior ulna, interosseous membrane
Distal:
- Volar bases of distal phalanges of index, long, ring, small
(finger extrinsic muscle)
Flexor Pollicis Brevis
Proximal:
- Flexor retinaculum/transvere carpal ligament, tubercle of scaphoid and trapezium
Distal:
- Lateral/radial base of proximal phalanx of thumb
(finger intrinsic muscle)
Abductor Pollicis Brevis
Proximal:
- Flexor retinaculum/transverse carpal ligament, tubercles of scaphoid and trapezium
Distal:
- Lateral/radial base of proximal phalanx of thumb (lateral to Flexor Pollicis Brevis)
(finger intrinsic muscle)
Opponens Pollicis
Proximal:
- Flexor retinaculum/transverse carpal ligament, tubercle of scaphoid and trapezium
Distal:
- All along lateral/radial aspect of I metacarpal
(finger intrinsic muscle)
Adductor Pollicis
Proximal:
- Transverse Head: anterior aspect of Metacarpal III
- Oblique head: base metacarpals II and III
Distal:
-Anteromedial/anterioulnar base of proximal phalanx thumb
(finger intrinsic muscle)
Flexor Digiti Minimi
Proximal:
- Hamate, flexor retinaculum/transverse carpal ligament
Distal:
- Medial/ulnar aspect of proximal phalanx of small
(finger intrinsic muscle)
Abductor Digiti Minimi
Proximal:
-Pisiform
Distal:
-Medial/ulnar aspect of proximal phalanx of small
(finger intrinsic muscle)
Opponens Digiti Minimi
Proximal:
- Hamate, flexor retinaculum/transverse carpal ligament
Distal:
- Medial/ulnar border of 5th metacarpal
Lumbricals
Proximal:
-To Index & Long: FDP tendons of index and long
-To Ring & Small: FDP tendons of ring and small
Distal: Lateral/radial aspect of oblique fibers of extensor mechanisms index, long, ring, small
(finger intrinsic muscle)
Palmar Interossei
Proximal:
- Anterior surface of metacarpals index, ring, and small
Distal:
- Volar bases of proximal phalanges index, ring, and small
- Oblique fibers of extensor mechanisms index, ring, small
(finger intrinsic muscle)
