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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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