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Extensor Digitorum
Pointer Plus

Pointer Plus

The Pointer Plus is an easy to use trigger point (TP) locator which incorporates a push button stimulation feature to immediately treat Trigger point pain.

 

The Extensor Digitorum is a superficial posterior muscle of the forearm.

Anatomical Attachments:

  • Origin: Attaches to the lateral epicondyle of the humerus by the common extensor tendon.
  • Insertion: Attaches to the 4 tendons of the distal phalanges and the extensor expansions of the medial 4 digits.

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

Synergist: Brachioradialis, Supinator, Extensor Carpi radialis brevis and longus, Abductor pollicis longus, Extensor pollicis brevis and longus, Extensor digiti minimi, Extensor carpi ulnaris, Extensor indicis.

Antagonist: Pronator teres, Flexor carpi radialis, Palmaris longus, Flexor carpi ulnaris, Flexor digitorum superficialis, Flexor digitorum profundus, Flexor pollicis longus, Pronator quadratus.

 

Click for Muscle Test 

 

Nerve Supply: Radial nerve (C6, C7, C8).

Vascular supply: Posterior interosseus of the ulnar artery.

Travell and Simons Trigger Point Pain Referral:  

Click on a small image to view an enlarged image

 

Trigger Point Signs and Symptoms: Weakness of grip, stiffness and tenderness of the IP joints, cramping of the fingers, soreness in the finger joints.

Trigger Point Activating and Perpetuating Factors: Repetitive finger movements, typing, playing a musical instrument, repetitive tapping of the fingers, playing video games.

Differential Diagnosis: Lateral Epicondylitis (tennis elbow), (Segmental, Subluxation, Somatic dysfunction) C7 radiculopathy, DE Quervain’s stenosing tenosynovitis, Ganglion cyst, Systemic infections or inflammation, Nutritional inadequacy, Metabolic imbalance, Toxicity, Side effects of medication.

 

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