◔
Brachialis
From WikiMSK
This article is a stub.
| |
| Brachialis | |
|---|---|
| Muscle Type | |
| Origin | Distal half of anterior surface of humerus and both medial and lateral intermuscular septa |
| Insertion | Tuberosity and coronoid process of ulna |
| Action | Origin fixed: Elbow flexion
Insertion fixed: Elbow flexion moving the humerus towards forearm (e.g. pull up) |
| Synergists | |
| Antagonists | |
| Spinal innervation | C5, C6 |
| Peripheral Innervation | Musculocutaneous Nerve |
| Vasculature | |
Manual Muscle Testing
Biceps Brachii and Brachialis
Patient: Sitting or supine
Fixation: One hand under elbow
Test: Elbow flexion slightly less than or at 90 degrees, with forearm supinated
Pressure: Against lower forearm into extension
Weakness: Decreased ability to flex forearm. In a musculocutaneous lesion causing weakness of biceps and brachialis there will be pronation of the forearm before flexion (using brachioradialis, ECRL, pronator teres, wrist flexors)
