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Flexor Digitorum Superficialis Anatomy: Origin, Insertion, Action

Flexor Digitorum Superficialis Anatomy

Flexor Digitorum Superficialis

O, I, A of the Flexor Digitorum Superficialis:

Origin: Humeroulnar head: medial epicondyle of the humerus via the common flexor tendon, medial border of the base of the coronoid process of the ulna
Radial head: oblique line of the radius along its supero-anterior border
Insertion: Distally via four tendons attaching to the anterior surface of the middle phalanx of digits 2-5

Insertion: Distally via four tendons attaching to the anterior surface of the middle phalanx of digits 2, 3, 4, 5

Actions: Flexion of the digits at proximal interphalangeal joints and metacarpophalangeal joints, flexion of the wrist

Innervation: Median nerve (C7, C8, T1)

Vascular Supply: Muscular branches from the ulnar and radial arteries

Primary Actions of the Flexor Digitorum Superficialis:

1. Flexion of the digits at the proximal interphalangeal joints

  Agonists: Flexor Digitorum Profundus

  Antagonists:

  • Lumbricals
  • Dorsal Interossei
  • Palmar Interossei
  • Extensor Digitorum
  • Extensor Indicis (second digit)
  • Extensor Digiti Minimi (fifth digit)

2. Assists with flexion of the digits at the metacarpophalangeal joints

  Agonists:

  • Dorsal Interossei
  • Palmar Interossei
  • Lumbricals
  • Flexor Digitorum Profundus
  • Flexor Digiti Minimi

  Antagonists:

  • Extensor Digitorum
  • Extensor Indicis
  • Extensor Digiti Minimi

Secondary Actions of the Flexor Digitorum Superficialis:

1. Assists with flexion of the digits at the metacarpophalangeal joints

  Agonists:

  • Dorsal Interossei
  • Palmar Interossei
  • Lumbricals
  • Flexor Digitorum Profundus
  • Flexor Digiti Minimi

  Antagonists:

  • Extensor Digitorum
  • Extensor Indicis
  • Extensor Digiti Minimi

2. Assists with flexion of the wrist

  Agonists:

  • Flexor Carpi Radialis
  • Palmaris Longus
  • Flexor Carpi Ulnaris

  Antagonists:

  • Extensor Carpi Radialis Longus
  • Extensor Carpi Radialis Brevis
  • Extensor Carpi Ulnaris

Note: Flexor pollicis longus and flexor digitorum profundus assist with flexion of the wrist.

flxr-digit-supr-fea

Information about cause and effect of flexor digitorum superficialis pain:

Flexor Digitorum Superficialis Muscle: Finger Pain

Human Muscle Anatomy

Musculoskeletal Anatomy Flashcards Musculoskeletal Flashcards Are you a student or professional therapist who needs to brush up on the musculoskeletal system? Dr. Joseph E. Muscolino DC has developed a comprehensive set of flashcards that will help develop a mind's picture of exactly where the muscles lie under the skin. A highly recommended study aid for students. Great for non students who want an easy comprehensive anatomy guide.

 

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The Anatomy Coloring Book is one of the best study and reference books for beginning anatomy students. The diagrams are clearly labeled and allow you to see the relationship and placement of the various structures of the body. You will also be surprised how the act of coloring will help with recall. But this is not just a beginners book, it is also great for practitioners and therapists to have on hand to use with clients and patients to use as a visual reference.

 

 

 

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Out of the scores of books in my office Basic Clinical Massage Therapy is by far the most referenced book in my library. The musculoskeletal system is overlaid on human models allowing you to learn the precise location, origin, and insertions of each muscle. The models are pictured in various poses throughout the book which also helps you visualize muscles in motion and their actions relationship with the skeletal structure and other muscles. Though it is written for massage therapists, it is an excellent book for anyone who wants to learn about the muscular system. MT's will benefit from recommended treatments for each muscle.

 

 

 

References:

The Trigger Point Therapy Workbook – Claire Davies, Amber Davies, and David G. Simons

Basic Clinical Massage Therapy: Integrating Anatomy and Treatment – James H. Clay and David M. Pounds

Trigger Point Therapy for Myofascial Pain – Donna Finando and Steven Finando