FIBULARIS TERTIUS

• Origin

Anterior surface of fibula, interosseous membrane

• Insertion

Dorsum of base of fifth metatarsal

• Agonist(s)

- Tibialis anterior

- Extensor digitorum longus

- Extensor hallucis longus

• Antagonist(s)

- Flexor digitorum longus

- Flexor hallucis longus

• Function

Ankle dorsiflexion, ankle eversion

TRIGGER POINT(S)

• Location

Trigger points can be found along the length of the muscle, particularly near its origin and insertion.

• Pain Referral Pattern

Pain may refer to the lateral side of the lower leg and the top of the foot, particularly the area around the fifth metatarsal.

It can cause aching or burning sensations along the outside of the ankle and foot.

• Potential Causes

• Overuse or repetitive activities involving dorsiflexion and eversion of the foot, such as walking, running, or jumping.

• Excessive strain during activities that require stabilizing the foot and ankle, especially on uneven surfaces.

• Poor footwear or improper biomechanics during activities.

• Trauma or injury to the lateral side of the lower leg and foot.

• Muscle imbalances between the fibularis tertius and other lower leg muscles.

• Prevention Tips

• Use proper techniques and footwear during activities involving dorsiflexion and eversion of the foot to avoid overloading the fibularis tertius.

• Incorporate regular stretching and strengthening exercises for the lower leg muscles.

• Ensure proper warm-up and cooldown routines before and after exercise.

• Gradually increase workout intensity to avoid sudden strain.

• Ensure balanced strength training to avoid muscle imbalances.