PRAC.15 Flashcards
carpal and digital extensors of the forelimb - - nerves; - superficial venous system - relationship to the deep system in the forelimb and to the v. jugularis externa

M. extensor digitorum lateralis
Origin: Lateral epicondyle of humerus
Insertion: Digits III-V (distal phalanx)
Action: Extend digits III-V
Innervation: N. radialis
Blood supply:
- A. interossea cranialis
- A. medialis
- A. brachialis

M. extensor digitorium communis
Origin: Lateral epicondyle of humerus
Insertion: Digits II-V (distal phalanx)
Action: Extend digits II-V
Innervation: N. radialis
Blood supply:
- A. interossea cranialis
- A. medialis
- A. brachialis

M. extensor carpi radialis
Origin: Lateral crista supracondylaris
Insertion: Mc II-III
Action: Extend carpus
Innervation: N. radialis
Blood supply:
- A. interossea cranialis
- A. brachialis
- A. medianus

M. abductor digiti I longus
Origin: Interosseous membrane of radius and ulna
Insertion: Metacarpal I
Action: Extend and Abduct digit I
Innervation: N. radialis
Blood supply: A. brachialis superficialis

M. extensor digitorium communis
Origin: Lateral epicondyle of humerus
Insertion: Digits II-V (distal phalanx)
Action: Extend digits II-V
Innervation: N. radialis
Blood supply:
- A. interossea cranialis
- A. medianus
- A. brachialis

M. extensor digitorum lateralis
Origin: Lateral epicondyle of humerus
Insertion: Digits III-V (distal phalanx)
Action: Extend digits III-V
Innervation: N. radialis
Blood supply:
- A. interossea cranialis
- A. medialis
- A. brachialis

M. extensor carpi radialis
Origin: Lateral crista supracondylaris
Insertion: Mc II-III
Action: Extend carpus
Innervation: N. radialis
Blood supply:
- A. interossea cranialis
- A. brachialis
- A. medianus

M. extensor digiti I et II (Ca)
Origin: Lateral middle third of ulna
Insertion: Mc. I and digit II
Action: Extend digit I-II
Innervation: N. radialis
Blood supply:
- A. interossea cranialis
- A. medialis
- A. brachialis

M. abductor digiti I longus
Origin: Interosseous membrane of radius and ulna
Insertion: Metacarpal I
Action: Extend and Abduct digit I
Innervation: N. radialis
Blood supply: A. brachialis superficialis

M. extensor carpi ulnaris
Origin: Lateral epicondyle of humerus (behind collateral ligament)
Insertion: MC V, accessory carpal bone
Action: Flexion, abduction and rotation of carpus
Innervation: N. radialis
Blood supply:
- A. interossea cranialis
- A. brachialis
- A. medianus

M. extensor carpi ulnaris
Origin: Lateral epicondyle of humerus (behind collateral ligament)
Insertion: MC V, accessory carpal bone
Action: Flexion, abduction and rotation of carpus
Innervation: N. radialis
Blood supply:
- A. interossea cranialis
- A. brachialis
- A. medianus

M. extensor carpi ulnaris
Origin: Lateral epicondyle of humerus (behind collateral ligament)
Insertion: MC V, accessory carpal bone
Action: Flexion, abduction and rotation of carpus
Innervation: N. radialis
Blood supply:
- A. interossea cranialis
- A. brachialis
- A. medianus
Which nerve(s) serve the carpal and digital extensors of the forelimb?
N. radialis

Nervi radialis
List the vessels of the superficial venous system
-
Vena cephalica
- Vena axillobrachialis
- Vena mediana cubiti
- Vena cephalica accessoria

Vena cephalica

Vena axillobrachialis
Links vena circumflexa humeri caudalis (Deep) to vena cephalica (Superficial)

Vena mediana cubiti
Links vena brachialis and v**ena cephalica

Vena omobrachialis
Leading to vena jugularis externa