Pronator Quadratus

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Pronator Quadratus mmPronator Quadratus    Pronator Quadratus: Origin and Insertion

Origin: Lower quater of the anterior surface of the ulna

Insertion: Lower quarter of the anterior side of the radius

Actions: Pronation

Innervation: Median nerve

Daily uses: Turning a screwdriver

Back to muscles

Other muscles of the Upper Limb

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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