Extensor Digiti Minimi

Muscle Origin

Lateral epicondyle of the humerus/tendon of extensor digitorum to the fifth phalanx.

The anterior portion of the lateral epicondyle of the humerus (common extensor tendon).

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At the extensor expansion, located at the base of the proximal phalanx of digit V on the dorsal side.

Main attachment: dorsal aspect of the base of the proximal phalanx of each of the four digits.
Central slip: dorsal aspect of the base of the middle phalanx of each of the four digits.
Lateral bands: via two slips to the dorsal aspect of the base of the distal phalanx of each of the four digits.

Action

Extends little finger.

Extends the wrist and the little finger at all joints.

Innervation – Nerve control

Posterior interosseous nerve.

Extends all of the fingers with the exception of the thumb, and aids in the extension of the wrist.

Artery

Posterior interosseous artery.

The posterior interosseous artery (dorsal interosseous artery) is an artery of the forearm. It passes backward between the oblique cord and the upper border of the interosseous membrane. It appears between the contiguous borders of the supinator and the abductor pollicis longus, and runs down the back of the forearm between the superficial and deep layers of muscles, to both of which it distributes branches. Wiki

Antagonist muscles

Flexor digiti minimi brevis.

The flexor digiti minimi brevis is a muscle in the hand that flexes the little finger.

Pictures of muscles

 

Trigger Point Referrals

 

Stretching description

 

Exercises

 

Injuries

 

Treatment

 

Additional Resources
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