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Rectus Femoris
Flexes thigh at the hip, extends the lower leg.
Located: Mid anterior thigh
Vastus Lateralis and Vastus Medialis
Extends the lower leg.
Located: Anterior thigh
Vastus Intermedius
Extends the lower leg.
Located: Anterior thigh, deep to rectus femoris
Tibalis Anterior
Flexes the foot, dorsiflexion, inverts foot (inversion).
Location: Anterior middle lower leg.
Gastrocnemius
Allows plantarflexion of the foot (ex. standing on ball of foot). Flexes the lower leg.
Location: Superficial muscles of the posterior lower leg.
Soleus
Extends the foot, allows plantarflexion.
Located: Posterior lower leg, deep to gastrocnemius.