
Plantaris Muscle
Primary Actions of the Plantaris Muscle
1. The plantaris muscle is not a prime mover and does not have a primary action
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Secondary Actions of the Plantaris Muscle
1. Assists with flexion of the knee
Agonists:
- Biceps Femoris
- Semitendinosus
- Semimembranosus
Antagonists:
- Vastus Lateralis
- Vastus Medialis
- Vastus Intermedius
- Rectus Femoris
2. Assists with plantarflexion of the foot at the ankle
Agonists:
- Gastrocnemius
- Soleus
Antagonists: Tibialis Anterior
Information about cause and effect of Plantaris pain: Plantaris Muscle: Pain Behind The Knee