Fibularis Brevis Muscle

Authors
Affiliations

Nathaniel 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

Schematic of Muscles of the lateral compartment of the lower leg1 1: Fibularis Longus 2: Fibularis Brevis

Schematic of Muscles of the lateral compartment of the lower leg1
1: Fibularis Longus
2: Fibularis Brevis

Muscles of the lateral compartment of the lower leg1

Muscles of the lateral compartment of the lower leg1
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 fibula1

Insertion

5th metatarsal base1

Innervation

Superficial Fibular N. (L5, S1)1

Action

  • TCJ: PF1
  • STJ: Eversion1

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.”2

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.
Gilroy AM, MacPherson BR, Wikenheiser JC, Voll MM, Wesker K, Schünke M, eds. Atlas of Anatomy. 4th ed. Thieme; 2020.
2.
Dutton M. Dutton’s Orthopaedic Examination, Evaluation, and Intervention. 5th ed. McGraw Hill Education; 2020.

Citation

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