Tibialis Anterior - Muscle Physiology & Functional Anatomy

 

Tibialis Anterior Muscle

Anatomy

 

Origin:

  • Lateral tibia (Upper half of lateral shaft of tibia & interosseous membrane)

Insertion

  • Medial & plantar aspect of medial cuneiform & base of 1st metatarsal



Major Arteries:

  • Anterior tibial artery

 

Neural Innervation:

  • Deep fibular (peroneal) nerve (L4-L5)

 

Trigger Points: 

Tibialis Anterior Trigger Points

 

Physiology

 

Concentric Functions:

  • Dorsiflexion & inversion of the foot at ankle

Eccentric Functions:

  • Decelerates plantarflexion & eversion of the foot at ankle

Isometric Function:

  • Holds up medial longitudinal arch of foot


Related Muscles


Antagonists:

Exercises:

 

 


More Images of the Tibialis Anterior Muscle

Tibialis Anterior


More Information about the Tibialis Anterior Muscle

The tibialis anterior stabilizes the the ankle as the foot hits the ground during the contact phase of walking (eccentric contraction) & acts later to pull the foot clear of the ground during the swing phase (concentric contraction).

An isometric contraction of the tibialis anterior is what "locks" the ankle in place when kicking.  The tibialis anterior muscle is sometimes referred to in reverse as anterior tibialis. 

 

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