PRAC.15

Question 1

Answer 1

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

Question 2

Answer 2

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

Question 3

Answer 3

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

Question 4

Answer 4

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

Question 5

Answer 5

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

Question 6

Answer 6

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

Question 7

Answer 7

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

Question 8

Answer 8

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

Question 9

Answer 9

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

Question 10

Answer 10

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

Question 11

Answer 11

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

Question 12

Answer 12

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

Question 13

Which nerve(s) serve the carpal and digital extensors of the forelimb?

Answer 13

N. radialis​​

Question 14

Answer 14

Nervi radialis

Question 15

List the vessels of the superficial venous system

Answer 15

• Vena cephalica
  
  • ​Vena axillobrachialis
  • Vena mediana cubiti
  • ​​Vena cephalica accessoria

Question 16

Answer 16

Vena cephalica

Question 17

Answer 17

Vena axillobrachialis

Links vena circumflexa humeri caudalis ^_(Deep) to vena cephalica ^{_{(Superficial)}}

Question 18

Answer 18

Vena mediana cubiti

Links vena brachialis and v**ena cephalica

Question 19

Answer 19

Vena omobrachialis

Leading to vena jugularis externa