Thoracic Limb Nerves

Question 1

The nerves that innervate the thoracic limb originate from what?

Answer 1

The brachial plexus

Question 2

What is the brachial plexus formed by?

Answer 2

Ventral branches of the cervical and thoracic spinal nerves

Question 3

Where do the nerves of the brachial plexus emerge from?

Answer 3

The intervertebral foramina

Question 4

The _____ nerves innervate all pectoral muscles.

Answer 4

Pectoral

Question 5

Which nerves innervate the supraspinatus and infraspinatus muscles?

Answer 5

The suprascapular nerve

Question 6

The ______ nerve is found as branches entering directly into the subscapularis muscle on the medial side of the limb.

Answer 6

Subscapular nerve

Question 7

What muscles does the axillary nerve innervate?

Answer 7

Deltoideus, teres major, teres minor

Question 8

The Lattissimus Doris is innervate by the _____ nerve.

Answer 8

Thoracodorsal

Question 9

What muscle does the lateral thoracic nerve innervate?

Answer 9

The cutaneous trunci

Question 10

The serratus ventralis muscle is innervate by the ____ _____ nerve.

Answer 10

Long Thoracic

Question 11

What are the two branches of the musculocutaneous nerve and what does each innervate?

Answer 11

1. Proximal muscular branch of the musculocutaneous nerve : innervates coracobrachialis and biceps brachii
2. Distal muscular branch of the musculocutaneous nerve: Brachialis muscle

Question 12

How does the musculocutaneous nerve terminate?

Answer 12

It splits into a communicating branch of the musculocutaneous nerve that meets the median nerve, and the medial cutaneous antebrachial nerve which innervates the medial skin of the antebrachium

Question 13

The _____ nerve has a functional overlap with the ulnar nerve.

Answer 13

Median

Question 14

What does the median nerve innervate?

Answer 14

Flexors of the carpus and digit, including the pronator teres, flexor carpi radialis, pronator quadratis, superficial digital flexor, and deep digital flexor. It also innervates the skin of the caudal antebrachium and palmar paw.

Question 15

What does the ulnar nerve innervate?

Answer 15

Flexors of the carpus and digit, including the flexor carpi ulnaris, deep digital flexor ulnar and numeral heads, and interosseus muscle.

Question 16

Which nerve innervates the skin of the caudal antebrachium, skin of the palmar paw, and skin of the 5th metacarpal b. And lateral surface of the digit.

Answer 16

Caudal cutaneous antebrachial nerve

Question 17

The ____ nerve is the large nerve passing mid-brachial from medial to lateral. What does it innervate?

Answer 17

• Radial
• Elbow extensors: Triceps brachii, tensor fascia antebrachii, and anconeus
• Carpus and digit extensors: extensor carpi radialis, common digital extensor, lateral digital extensor, ulnaris lateralis, supinator, abductor pollicis Longo’s

Question 18

The _____ nerve is sensory to skin of the cranial and lateral antebrachium and dorsal paw.

Answer 18

Radial