Subclavius

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Subclavius    Subclavius: Origin and Insertion Subclavius

Origin: Anterior surface at the junction between the first costal cartilage and 1st rib.

Insertion: Subclavian groove of the clavicle.

Actions: Depresses clavicle and pulls towards sternum.

Innervation: C5, 6

Daily uses: Steadies clavicle in movements of shoulder girdle ie cricket bowling, lifting something onto top shelf.

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Other muscles…..

Infraspinatus

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

Supraspinatus

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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