Adductor Pollicis

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Adductor Pollicis

Origin: 

Oblique head: base of 2nd and 3rd metacarpals, trapezoid and capitate.

Transverse head: Palmar border and shaft of 3rd metacarpal

Insertion: Ulnar sesamoid then ulnar side of base of proximal phalanx and tendon of extensor pollicis longus.

Actions: Adducts CMC joint of thumb.

Innervation:  T1 : Deep branch of ulnar nerve

Daily uses: Allows thumb to grip jar when opening lid.


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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


More Anatomy

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Ligaments

Check out strengthening exercises for the rotator cuff

 

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