|
|
Muscles of the Arm
| |
Muscle |
Innervation |
Origin |
Insertion |
Action |
Nerve Root |
| 1 |
Coracobrachialis |
Musculocutaneous |
Coracoid |
mid.humerus medial |
Flexion, adduction |
C5,6,7 lat cord |
|
| 2 |
Biceps |
Musculocutaneous |
Coracoid(SH), Supraglenoid (LH) |
Radial tuberosity |
Supination, flexion |
C5,6 lat cord |
|
| 3 |
Brachialis |
Musculocutaneous-medial, radial lateral |
Ant. Humerus |
Ulnar tuberosity (ant) |
Flexes forearm |
C5,6 lat/post cord |
|
| 4 |
Triceps |
Radial |
Infraglenoid(LH), Post.Humerus(lat H.), Post. Humerus (MH) |
Olecranon |
Extends forearm |
C6,7,8,T1 post cord |
|
Nerves of the Arm
- Median nerve
- Radial nerve
- Ulnar nerve
- Musculocutaneous nerve
- Lateral antebrachial cutaneous nerve
- Lateral Brachial cutaneous nerve: Branch of radial nerve.
Arteries and Veins of the Arm
- Cephalic vein
- Brachial artery and veins
|
