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Flexor Hallucis Longus

Region

Origin & Insertion

['Origin: Posterior surface of fibula and interosseous membrane', 'Insertion: Base of distal phalanx of great toe']

Synergistic Muscles

['Flexor digitorum longus', 'Tibialis posterior']

Joints

['Ankle', '1st MTP and IP joints']

Primary Actions

['Flexes great toe', 'Plantarflexes ankle', 'Supports medial arch']

Nerve & Spinal Segment

Tibial nerve

Sacral plexus; S2–S3

Interesting

Critical for toe-off during gait. [Moore’s]

Reversal of Action

Lift midfoot via toe press

Common Dysfunctions

Hallux control deficit, toe-off weakness

How to Stretch

Toe extension with ankle dorsiflexion.

Trigger Points

How to Strengthen

Towel curls with big toe focus.

Concentric Action

Flex big toe, assist plantarflexion

Applications:

Important in push-off phase of gait and toe grip control

Eccentric Action

Control big toe extension

Isotonic Action

Toe curls with towel or band

Related Conditions

['Hallux rigidus', 'Medial tendinopathy']

Isometric Action

Hold toe pressed downward

Exercise Ideas

['Toe curls', 'Doming', 'Heel raise with big toe press']

Related Blogs

Images

Videos

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