Flexor Pollicis Longus

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Flexor Pollicis Longus mm   Flexor Pollicis Longus Flexor Pollicis Longus: Origin and Insertion

Origin: Anterior surface of radius and adjacent interosseous membrane.

Insertion: Base of distal phalanx of thumb

Actions: Flexes distal phalanx of thumb

Innervation: Ant interosseous N (C7, 8)

Daily uses: Gripping on jar.

 

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Other muscles …

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

 

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

Subscapularis

Origin: Anterior (costal) surface of the scapula

Insertion: Lesser tuberosity of the humerus

Actions: Internal rotation
, Adduction

Innervation: Upper and lower subscapular nerves

Daily uses: Tucking the back of your shirt into your trousers

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