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Brachialis

Region

Origin & Insertion

['Origin: Anterior distal humerus', 'Insertion: Ulnar tuberosity and coronoid process']

Synergistic Muscles

['Biceps brachii', 'Brachioradialis']

Joints

['Elbow']

Primary Actions

['Elbow flexion (regardless of forearm position)']

Nerve & Spinal Segment

Musculocutaneous nerve (main), radial nerve (minor)

Brachial plexus; C5–C6

Interesting

Strongest elbow flexor. [Moore’s Anatomy]

Reversal of Action

Pull upper arm toward forearm

Common Dysfunctions

Weak elbow flexion in all forearm positions

How to Stretch

Full elbow extension with shoulder extension.

Trigger Points

How to Strengthen

Hammer curls and reverse curls.

Concentric Action

Flex elbow regardless of forearm position

Applications:

Pure elbow flexor — strengthens through full ROM and all grip types

Eccentric Action

Lower forearm from curl position

Isotonic Action

Hammer curls

Related Conditions

['Brachial neuritis', 'Elbow instability']

Isometric Action

Hold elbow flexed with neutral grip

Exercise Ideas

['Zottman curls', 'Hammer curl', 'Eccentric elbow flexion']

Related Blogs

Images

Videos

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