Flexor Carpi Radialis

Authors
Affiliations

Nate Yomogida, B.S., SPT

Doctor of Physical Therapy

B.S. in Kinesiology

Chloë Kerstein, B.S., SPT

Doctor of Physical Therapy

B.A. in Neuroscience

Figure 1: Left Humerus (Anterior view)

Mucous sheaths of the tendons of the wrist and digits1

Mucous sheaths of the tendons of the wrist and digits

Transverse section of distal forearm1

Transverse section of distal forearm

Transverse cut of the Hand1

Transverse cut of the Hand

Muscles of the thumb1

Muscles of the thumb

Palmar muscles of the hand (left)1

Palmar muscles of the hand (left)
Figure 2: Muscles that move the Forearm
Reading list
  • Wrist and finger flexor Muscles
  • MMT

Origin

Medial epicondyle of Humerus

Pathway

In the mid-forearm, the FCR is medial to the brachioradialis

Insertion

  • Base of 2nd metacarpal
  • Anatomical variations include base of 3rd metacarpal

Innervation

Median N. (C6, C7)

Action

  • Wrist: Flexion, Radial deviation
  • Can assist with elbow flexion and forearm pronation (biomech)

FCR contraction acts a limit to prevent excessive elongation of the lateral pillar. # Tendon

The tendon of the FCR runs anterior to the scaphoid and acts as a sling and translates the scaphoid posteriorly.

Notes

1.
Gray H. Anatomy of the Human Body. 20th ed. (Lewis WH, ed.). Lea & Febiger; 1918. https://www.bartleby.com/107/
2.
Betts JG, Blaker W. Anatomy and Physiology. 2nd ed. OpenStax; 2022. https://openstax.org/details/books/anatomy-and-physiology-2e/?Book%20details
3.
Donnelly JM, Simons DG, eds. Travell, Simons & Simons’ Myofascial Pain and Dysfunction: The Trigger Point Manual. Third edition. Wolters Kluwer Health; 2019.
4.
Neumann DA, Kelly ER, Kiefer CL, Martens K, Grosz CM. Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation. 3rd ed. Elsevier; 2017.
5.
Weinstock D. NeuroKinetic Therapy: An Innovative Approach to Manual Muscle Testing. North Atlantic Books; 2010.
6.
Gilroy AM, MacPherson BR, Wikenheiser JC, Voll MM, Wesker K, Schünke M, eds. Atlas of Anatomy. 4th ed. Thieme; 2020.
7.
Jones B. B Project Foundations. b Project; 2025.

Citation

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