Palmar Interossei

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 Palmar Interossei are muscles of the hand.

Anatomical Attachments:

• Origin: There are three volar interossei. One attaches to the ulnar side of the 2nd metacarpal bone, the other two attach to the lateral aspect of the 4th and 5th metacarpal bones.
• Insertion: Attach to the base of the proximal phalange to the extensor expansion of the 2nd, 4th and 5th digits.

Action: Draws the digit towards the middle digit.

Click for Muscle Test 

Nerve Supply: Deep volar branch of the ulnar nerve.

Nerve Entrapment: Entrap the digital nerves that cause cutaneous hypoesthesia along the side of the finger that is affected.

Vascular supply: Deep volar arch artery

• Primary: Myofascial TrPs in the Palmar Interossei refer pain along the side of the finger that it attaches to.
• Satellite or associated triggers: Intrinsic thumb muscles, Long flexors and extensors of the fingers, Latissimus Dorsi, Pectoralis major, Scalene, Lateral or medial head of the Triceps brachii.

Trigger Point Signs and Symptoms: Pain or stiffness of the fingers, impairment of hand motion and tenderness of the joints.

Trigger Point Activating and Perpetuating Factors: Repetitive pincer grasp, knitting, coloring, drawing or writing for long periods of time.

Differential Diagnosis: (Segmental, Subluxation, Somatic dysfunction) C6 radiculopathy, Ulnar neuropathy, C8 or T1 radiculopathy, Thoracic outlet syndrome, Carpal tunnel syndrome, De Quervain’s stenosing tenosynovitis, Carpometacarpal dysfunction, Osteoarthritis, Articular Dysfunction, Bone cancer, Bone fracture, Strain/Sprain, Rheumatoid Arthritis, Dupuytren’s Contracture, Ganglion cyst, Mixed Connective Tissue Disease, Raynaud’s Phenomenon, Frostbite, Diabetic Neuropathy, Systemic infections or inflammation, Nutritional inadequacy, Metabolic imbalance, Toxicity, Side effects of medication. >

Back to Top