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Extensor Carpi Radialis Brevis

Region

Origin & Insertion

['Origin: Lateral epicondyle of humerus', 'Insertion: Base of 3rd metacarpal']

Synergistic Muscles

['ECRL', 'ED']

Joints

['Wrist']

Primary Actions

['Wrist extension', 'Radial deviation']

Nerve & Spinal Segment

Radial nerve (deep branch)

Brachial plexus; C7–C8

Interesting

Most commonly involved in lateral epicondylitis. [Moore’s]

Reversal of Action

Raise elbow via fixed hand

Common Dysfunctions

Tennis elbow (lateral epicondylitis), weak grip

How to Stretch

Wrist flexion with pronation.

Trigger Points

How to Strengthen

Reverse curls, isometric holds.

Concentric Action

Extend and abduct wrist (shorter lever)

Applications:

Primary site for tennis elbow; crucial in grip force stabilization

Eccentric Action

Controlled wrist flexion

Isotonic Action

Reverse wrist curls

Related Conditions

['Tennis elbow', 'Extensor tendonitis']

Isometric Action

Hold wrist in extension with resistance

Exercise Ideas

['Reverse wrist curl', 'Band extension', 'Wrist roller reverse']

Related Blogs

Images

Videos

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