National Associaltion of Myofascial Trigger Point Therapists - Symptom Checker

Flexor Digitorum
This is the technical name of the muscle being described.  This name may be used to find additional information in any medical resource. Flexor Digitorum
A group of muscles generally denotes muscles of the same function and may share a common attachment point. Finger flexors
Muscle function, in this definition, is what the muscle could do if it was to contract by itself with the body in anatomical position.  This is a general definition of muscle function.  For more information on how muscles work together on the body please refer to a physiology or functional anatomy text.

These muscles primarily extend the fingers and the hand at the wrist.  They also provide synergistic function to permit specific grasp functions of individual fingers.  They make an essential contribution to forceful finger flexion.

A description of where a Myofascial Trigger Point may produce pain in the body.  This area is generally located away from the trigger point.

Pain from TrPs in these muscles projects down the forearm to the back of the hand and often to the fingers that are moved by the involved muscle fibers.  Pain from the extensor indicis is felt most strongly at the junction of the wrist and the back of the hand.  There may be tenderness in the lateral epicondyle (outside elbow) region.

A description of the symptoms a person may experience with trigger points in the muscle being described.

A person with TrPs in these muscles may complain of pain, weakness, stiffness and tenderness of the proximal interphalangeal joints.  Symptoms appear in the finger that corresponds to the involved portion of the extensor muscle group.


 A list of possible diseases that fit the information derived from examination of a patient.

  1. Lateral epicondylitis.
  2. C7 radiculopathy.
  3. DeQuervain’s stenosing tenosynovitis.
  4. Volar subluxation of carpal bones.
  5. Key TrPs in scalenes or serratus posterior superior.

A list of activities or positions that may either CAUSE a trigger point to manifest or PROLONG a pain condition respectively.

  1. Overuse of forceful repetitive finger movements by professional musicians, carpenters, or mechanics, and frequently stretching a rubber band with the finger extensors.
  2. Extensor tendon displacement over the metacarpophalangeal joint.

A corrective action is usually a modification of daily routine which will reduce stress on the affected muscle(s) in a person with myofascial trigger points.

  1. A person should avoid overload of the finger extensors.
  2. The stress of repeatedly shaking hands can be reduced by offering the hand with the palm up and hand slightly extended.
  3. Avoid testing painful motions in order to give the muscles a chance to rest and recover, resuming only those activities that do not precipitate pain.
  4. Avoid grasping jar lids in a manner that places these muscles at a mechanical disadvantage.  Keep the wrist cocked in extension and by using the entire arm as a lever.

References : 
Simons DG, Travell JG, Simons LS, Myofascial Pain and Dysfunction: The Trigger Point Manual, vol 1, 2nd Ed. Baltimore: Williams and Wilkins, 1999.

Travell JG, Simons DG, Myofascial Pain and Dysfunction, vol 2. Baltimore: Williams & Wilkins, 1992.

This information is not intended to diagnose, treat, or cure any disease.  A proper diagnosis should be sought from a licensed health care provider.