Lab 19: Forelimb

Question 0

What group of muscle do the median and ulnar nerves innervate?

Answer 0

Flexors of the carpus and digit (flexor carpi radialis, superficial digital flexor, deep digital flexor)

Question 1

what does the medial cutnaneous antebrachial nerve innervate?

Answer 1

Skin between elbow and fetlock

Question 2

The ulnar nerve runs between which two muscles in the distal antebrachium?

Answer 2

flexor carpi ulnaris and ulnaris lateralis

Question 3

When does the brachial artery become the median artery?

Answer 3

After giving off the common interosseus artery

Question 4

Which two nerves anastomose in the distal limb?

Answer 4

palmar branch of the ulnar nerve and lateral palmar

Question 5

When does the median artery become the medial palmar artery?

Answer 5

When it passes through the flexor canal

Question 6

Which artery and nerve pass within the carpal canal?

Answer 6

medial palmar artery and nerve

Question 7

Muscles supplied by the suprascapular n.

Answer 7

supraspinatus, infraspinatus

Question 8

muscles supplied by the axillary n.

Answer 8

deltoideus, subscapularis.

Question 9

muscle supplied by the subscapular n.

Answer 9

subscapularis

Question 10

muscles supplied by the radial n.

Answer 10

triceps, extensor carpi radialis, ulnaris lateralis, common digital extensor

Question 11

muscles supplied by the median n.

Answer 11

flexor carpi radialis, deep digital flexor

Question 12

muscles supplied by the ulnar n.

Answer 12

superficial digital flexor, deep digital flexor

Question 13

OIAN: supraspinatus

Answer 13

O: supraspinous fossa and spine of scapula
I: greater and lesser tubercles of humerus
A: extend shoulder, stabilize cranial shoulder
N: suprascapular n.

Question 14

OIAN: infraspinatus

Answer 14

O: infraspinous fossa
I: greater tubercle of the humerus
A: abduct the arm, acts as lateral collateral lig. of the shoulder joint
N: suprascapular n.

Question 15

OIAN: deltoideus

Answer 15

O: spine of scapula, aponeurosis over infraspinatus m.
I: deltoid tuberosity
A: flex shoulder, abduct arm
N: axillary n.

Question 16

OIAN: subscapularis

Answer 16

O: subscapular fossa
I: lesser tub. of humerus
A: adduct the humerus, stabilize medial shoulder
N: subscapular and axillary nn.

Question 17

OIAN: biceps brachii

Answer 17

O: supraglenoid tubercle
I: radial tuberosity, tendon of extensor carpi radialis
A: flex elbow, extend shoulder and carpus
N: musculocutaneous n.

Question 18

OIAN: triceps brachii

Answer 18

O: long head: caudal border of scapula
lateral head: lateral surface of humerus
medial head: medial surface of humerus
I: olecranon
A: long head: extend elbow, flex shoulder
lateral and medial head: extend elbow

Question 19

OIAN: Extensor carpi radialis

Answer 19

O: lateral epicondyle of humerus
I: Metacarpal tuberosity, Metacarpal 3
A: extend carpus, flex elbow
N: radial n.

Question 20

OIAN: ulnaris lateralis

Answer 20

O: lateral epicondyle of humerus
I: accessory carpal bone, 4th carpal and metacarpal bones
A: flex carpus, extend elbow
N: radial n.

Question 21

OIAN: common digital extensor

Answer 21

O: lateral epicondyle of humerus, lateral tuberosity of radius, body of ulna
I: extensor process of 3rd phalanx
A: extend digit/carpus, flex elbow
N: radial n.

Question 22

OIAN: flexor carpi radialis

Answer 22

O: medial epicondyle of humerus
I: second metacarpal bone
A: flex carpus, extend elbow
N: median n.

Question 23

OIAN: superficial digital flexor

Answer 23

O: medial epicondyle of humerus, olecranon, caudal surface of radius
I: flexor surface of 3rd phalanx
A: flex digit/carpus, extend elbow
N: median and ulnar n.

Question 24

OIAN: interosseus

Answer 24

O: palmar surface of 3rd metacarpal bone and distal row of carpal bones
I: abaxial surfaces of proximal sesmoids and tendon of common digital extensor
A: support fetlock
N: palmar metacarpal nn.