Flexor Digitorum Superficialis - Muscle Physiology & Functional Anatomy


Flexor Digitorum Superficialis Muscle




  • Humeral head: Common flexor origin of medial epicondyle of the humerus, medial ligament of elbow.

  • Ulnar head: Medial border of coronoid process & fibrous arch

  • Radial head:  Entire length of the anterior oblique line


  • Tendons split to insert onto sides of middle phalanges of medial four fingers

Major Artery:

  • Ulnar artery


Neural Innervation:

  • Median nerve (C7-C8) (from medial & lateral cords)


Trigger Points: 

Trigger Points for the Flexor Digitorum Profundus and Superficialis




Concentric Functions:

  • Flexes proximal interphalangeal joints

  • Secondarily flexes metacarpophalangeal joints & wrist

Eccentric Functions:

Isometric Function:

Related Muscles





More Images of the Flexor Digitorum Superficialis Muscle

How to Palpate the Flexor Digitorum Superficialis

More Information about the Flexor Digitorum Superficialis Muscle

Although there is no debate that the flexor digitorum superficialis muscle is in the anterior compartment of the forearm It is sometimes considered to be the deepest part of the superficial layer of this compartment and sometimes considered to be a distinct, "intermediate layer" of the anterior compartment.


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