Main Muscles of the Elbow are:
Flexion
- Biceps Brachii
- Brachialis
Extension
- Triceps
Muscle | Origin | Insertion | Action(s) | Palpation |
Bicep Brachii | 2 heads- top of the corocoid process and the upper lip of the glenoid fossa. | Tuberosity of the radius. | Flexion of the elbow.Supination of the forearm. | Easily palpated on the anterior aspect of the humerus. |
Brachialis | Lower ½ of the anterior portion of the humerus. | Corocoid process of the humerus. | Flexs the elbow | Lateral side of the upper arm under the biceps muscle. |
Tricep | Long Head –lower edge of the glenoid cavity of the scapula.Lateral Head – upper ½ of the posterior surface of the humerus. Medial Head – lower 2/3rds of the posterior surface of the humerus. | Olecranon process of the ulna. | Extends the elbow | Posterior and lateral aspects of the humerus. |