Fibularis Brevis Muscle

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: Muscles of the lower leg
Figure 2: Intrinsic foot muscles

Muscles of the anterior leg2

Muscles of the anterior leg
Figure 3: Superficial posterior leg muscles

Deep posterior leg muscles2

Deep posterior leg muscles

The Mucous sheaths of the tendons around the ankle (lateral view)2

The Mucous sheaths of the tendons around the ankle (lateral view)
Reading list
  • Ch64 Fibularis longus, brevis, tertius muscle
  • Neuman
  • MMT
Muscle Origin Insertion Innervation Action
Fibularis brevis Middle lateral surface of Fibula Base of 5th MT Superficial Fibular n.
L5 - S1		 TCJ: PF
STJ: Eversion

Origin

Middle lateral surface of fibula

Insertion

5th metatarsal base

Innervation

Superficial Fibular N. (L5, S1)

Action

  • TCJ: PF
  • STJ: Eversion

Tendon

“The origin for the fibularis (peroneus) brevis is more distal to the fibularis (peroneus) longus and lies deeper. It becomes superficial on the lateral aspect of the foot, at its insertion on the tuberosity of the fifth metatarsal.”

Length Testing

Strength Testing

The fibularis longus, Fibularis brevis, and Fibularis Tertius cannot be differentiated from eachother, so the same MMT is used for all 3:

  • Patient is in supine and the other, with the foot over the edge of the table and the ankle in the anatomic position. Resistance is applied to the lateral border of the forefoot

References

1.
Betts JG, Blaker W. Anatomy and Physiology. 2nd ed. OpenStax; 2022. https://openstax.org/details/books/anatomy-and-physiology-2e/?Book%20details
2.
Gray H. Anatomy of the Human Body. 20th ed. (Lewis WH, ed.). Lea & Febiger; 1918. https://www.bartleby.com/107/
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.
Dutton M. Dutton’s Orthopaedic Examination, Evaluation, and Intervention. 5th ed. McGraw Hill Education; 2020.

Citation

For attribution, please cite this work as: