Contents
Anatomy
General information
- This section is strictly limited to anatomy, you might be looking for clinical relevant information which is found under the clinical chapters -- muscles section, click here to go to that page
- Peroneus longus is also called the fibularis longus
Position
- Superficial
- The distal tendon that runs underneath the foot is deeply positioned
Origin
- Lateral condyl tibia
- Caput fibula
- Lateral aspect fibula
- Proximal 1/2
- Septum intermusculare
- Adjacent deep fascia of septum intermusculare
Insertion
- Medial part of os cuneiforme
- Base of 1 metatarsal
- Lateral side
Main function
- Ankle
- Plantarflexion
- Tarsal joint
- Eversion
Nerve innervation
- Segmental
- L5, S1
- Peripheral
- Superficial part of peroneal nerve
Arterial supply
- Fibular artery
Palpation
- Patient position
- Supine or sidelying
- Place your hand laterally on the leg just distal to caput fibula
- Ask the patient to perform an eversion of the foot while you feel for contraction in the muscle
- You can follow the muscle distally to the foot
- If you follow the muscle all the way down to lateral malleoli, then both the peroneus longus and brevis will be visible here just posterior and proximal to the malleoli
- Of the two, the peroneus longus is the most superficial and posterior
Strength test
- Patient position
- Supine
- Place the patient's leg in a medially rotated position
- Stabilize the patient's leg by gripping it just proximal to the malleoli
- Hollow the hand and hold it underneath the patient's footsole so that your thumb is covering the lateral limitation of the foot, and the footsole is covered by your palm
- Ask the patient to give force towards plantarflexion and eversion while you give resistance