Page 327 - Kinesiology of the musculoskeletal system foundations for physical rehabilitation

Appendix II Reference Materials for Muscle Attachments and Innervation of the Upper Extremity 303

Distal attachment: posterior-ulnar surface of the base of the Extensor Pollicis Brevis
fifth metacarpal Proximal attachments: posterior surface of the middle to

Innervation: radial nerve distal parts of the radius and adjacent interosseous
membrane
Flexor Carpi Radialis Distal attachment: dorsal base of the proximal phalanx and
Proximal attachment: common flexor-pronator tendon attach- extensor mechanism of the thumb
Innervation: radial nerve
ing to the medial epicondyle of the humerus
Distal attachments: palmar surface of the base of the second Extensor Pollicis Longus
Proximal attachments: posterior surface of the middle part of
metacarpal and a small slip to the base of the third
metacarpal the ulna and adjacent interosseous membrane
Innervation: median nerve Distal attachment: dorsal base of the distal phalanx and exten-

Flexor Carpi Ulnaris sor mechanism of the thumb
Proximal attachments: Innervation: radial nerve
Humeral head: common flexor-pronator tendon attaching to
Flexor Digitorum Profundus
the medial epicondyle of the humerus Proximal attachments: proximal three fourths of the anterior
Ulnar head: posterior border of the middle one third of the
and medial side of the ulna and adjacent interosseous
ulna membrane
Distal attachments: pisiform bone, pisohamate and pisometa- Distal attachments: by four tendons, each to the palmar base
of the distal phalanges of the fingers
carpal ligaments, and palmar base of the fifth metacarpal Innervation:
bone Medial half: ulnar nerve
Innervation: ulnar nerve Lateral half: median nerve

Palmaris Longus Flexor Digitorum Superficialis
Proximal attachment: common flexor-pronator tendon attach- Proximal attachments:
Humeroulnar head: common flexor-pronator tendon attach-
ing to the medial epicondyle of the humerus
Distal attachment: central part of the transverse carpal liga- ing to the medial epicondyle of the humerus and the
medial side of the coronoid process of the ulna
ment and palmar aponeurosis of the hand Radial head: oblique line just distal and lateral to the bicipital
Innervation: median nerve tuberosity
Distal attachments: by four tendons, each to the sides of the
EXTRINSIC HAND MUSCULATURE middle phalanges of the fingers
Innervation: median nerve
Abductor Pollicis Longus
Proximal attachments: posterior surface of the middle part of Flexor Pollicis Longus
Proximal attachments: middle part of the anterior surface of
the radius and ulna, and adjacent interosseous membrane
Distal attachments: radial-dorsal surface of the base of the the radius and adjacent interosseous membrane
Distal attachment: palmar base of the distal phalanx of the
thumb metacarpal; occasional secondary attachments to
the trapezium and thenar muscles thumb
Innervation: radial nerve Innervation: median nerve

Extensor Digitorum INTRINSIC HAND MUSCULATURE
Proximal attachment: common extensor-supinator tendon Abductor Digiti Minimi
Proximal attachments: pisohamate ligament, pisiform bone,
attaching to the lateral epicondyle of the humerus
Distal attachments: by four tendons, each to the base of the and tendon of the flexor carpi ulnaris
Distal attachments: ulnar side of the base of the proximal
extensor mechanism and to the dorsal base of the proximal
phalanx of the fingers phalanx of the little finger; also attaches into the extensor
Innervation: radial nerve mechanism of the little finger
Innervation: ulnar nerve
Extensor Digiti Minimi
Proximal attachment: ulnar side of the belly of the extensor Abductor Pollicis Brevis
Proximal attachments: transverse carpal ligament, palmar
digitorum
Distal attachments: tendon usually divides, joining the ulnar tubercles of the trapezium and scaphoid bones
Distal attachments: radial side of the base of the proximal
side of the tendon of the extensor digitorum
Innervation: radial nerve phalanx of the thumb; also attaches into the extensor
mechanism of the thumb
Extensor Indicis Innervation: median nerve
Proximal attachments: posterior surface of the middle to distal

part of the ulna and adjacent interosseous membrane
Distal attachment: tendon blends with the ulnar side of the

index tendon of the extensor digitorum
Innervation: radial nerve