Left flexor hallucis longus

Identify flexor hallucis longus

The long posterior flexor directed toward the great toe.

Hallucis refers to the great toe, not toes two through five. Compare its distal destination with the neighboring long digital flexor.

Sources: Posterior-leg anatomy tables · OpenStax

Toward the inner ankle and sole

From the posterior fibula, its tendon reaches the base of the great toe's distal phalanx.

These tendons pass behind the medial malleolus under the flexor retinaculum. The retaining band, accompanying nerves and vessels are absent here: the viewer does not show a complete tarsal tunnel.

Sources: Posterior-leg anatomy tables · Leg & foot lab manual

Foot and toe actions

It flexes the great toe and assists plantar flexion.

Moving the foot at the ankle and bending a toe are different actions. This viewer retains the source pose; rotating the camera does not demonstrate either movement or estimate muscle force.

Sources: Posterior-leg anatomy tables · OpenStax

Innervation

The tibial nerve supplies these deep posterior muscles. Its course, branches and the regional blood vessels are not included in the current model.

Sources: Posterior-leg anatomy tables

Read the model

Explore left flexor hallucis longus in 3D

1. Inspect the deep surface. Start with Back in isolation, then rotate toward the sole. Restore context to compare the distal direction with the great toe; use its distal-phalanx link for a separate bone study.
2. Restore the surrounding structures. Show context restores 31 bones and 21 muscle parts on this side, including the foot bones. Surrounding surfaces may hide the selection; Isolate reveals it again.
3. Compare the three guides. The regional lower-leg close-up contains the tibia, fibula and thirteen muscle parts but no foot bones. Use this full-leg structure page for the distal bone context. Left deep posterior guides →

Sources and editorial status

This guide uses independently written explanations with links to the evidence behind them. Source checking and specialist anatomical review are separate steps; the latter is still pending.

1. TTUHSC El Paso — Hip, posterior thigh and leg anatomy tables

   Principal origins, distal attachments, general actions and tibial nerve supply. Summaries are not exhaustive insertion maps.

2. TTUHSC El Paso — Anterior leg & foot lab manual

   Medial ankle flexor tendons, flexor retinaculum and distal routes into the foot. Viewer instructions are original, not dissection instructions.

3. OpenStax Anatomy and Physiology 2e — Appendicular muscles of the pelvic girdle and lower limbs

   Deep posterior group and toe-flexor distinction. No textbook text or images reproduced.

3D geometry and its separate license are credited beneath the viewer. References do not imply endorsement of this site.