Forelimb Muscles - Extrinsic

Question 1

What makes up the cranial muscle group, what is the action, and what is the nerve supply?

Answer 1

Muscles: Trapezius, Omotransversarius, Brachiocephalicus
Action: Advances limb
Nerve: Accessory nerve

Question 2

What makes up the caudal muscle group, what is the action, and what is the nerve supply?

Answer 2

Muscle: Latissimus Dorsi
Action: Stabilizes scapula and helps to propel body forward during weight-bearing
Nerve: Thoracodorsal

Question 3

What makes up the dorsal muscle group, what is the action, and what is the nerve supply?

Answer 3

Muscle: Rhomboideus
Action: Raises and retracts the limb
Nerve: Brachial plexus nerve

Question 4

What makes up the ventral muscle group, what is the action, and what is the nerve supply?

Answer 4

Muscles: Superficial pectorals and deep pectorals
Action: Adducts the limb and supports the trunk
Nerve: Brachial plexus nerve

Question 5

What is the medial muscle group, what is the action, and what is the nerve supply?

Answer 5

Muscle: Serratus ventralis
Action: Supports the weight of the trunk and can advance or retract the limb
Nerve: Brachial plexus nerve branch