Extensor Carpi Radialis Brevis

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Extensor Carpi Radialis Brevis mm    Extensor Carpi Radialis Brevis: Origin and Insertion

Extensor Carpi Radialis Brevis 

Origin: Lateral epicondyle of the humerus

Insertion: Base of the 3rd metacarpal (dorsal side)

Actions: Extension of the wrist
Radial deviation (abduction) of the wrist

Innervation: Radial nerve

Daily uses: Typing


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Other muscles of the Upper Limb


Origin: Posterior surface of the scapula (below the spine of the scapula)

Insertion: Greater tuberosity on the humerus

Actions: Shoulder abduction, 
External rotation.

Innervation: Suprascapular nerve

Daily uses: Brushing hair.

Teres Minor

Origin: Mid section of the lateral border of the scapula

Insertion: Greater tuberosity on the humerus

Actions:External rotation, 
Shoulder adduction

Innervation: Axillary nerve

Daily uses: Brushing hair


Origin: Supraspinous fossa

Insertion: Greater tuberosity of the humerus

Actions: Abduction 
Stabilisation of the humerus

Innervation: Suprascapular nerve

Daily uses: Holding shopping bags away from the body

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