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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
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.
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