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The Tibialis Anterior is located in the Anterior Compartment of the (lower) leg. The muscles in the anterior compartment are:
- Tibialis anterior
- Extensor digitorum longus
- Extensor hallucis longus
- Fibularis tertius
ATTACHMENTS:
- Anterior tibia to the first cuneiform and first metatarsal.
- The tibialis anterior attaches proximally onto the lateral tibial condyle and the proximal 2/3 of the anterior tibia and proximal 2/3 of the interosseus membrane.
ACTIONS:
- Dorsiflexes the foot at the ankle joint.
- Inverts (Supinates) the foot at the subtalar joint.
NOTES:
- The tibialis anterior is the muscle principally involved with a condition known as anterior shin splints.
- The tibialis anterior and fibularis longus are named together as the stirrup muscles because they both attach onto the first cuneiform and first metatarsal and support the foot like a stirrup.
- Inversion is the principal cardinal-plane (frontal-plane) component of the oblique-plane motion pattern of supination.
