Summary
Origins
- Lateral condyle of the 🦴 femur
Insertions
- Posterior surface of the 🦴 calcaneus via the Achilles tendon
Actions
- Plantarflexes the ankle with the gastrocnemius-medial-head and soleus
- Assists knee flexion
The lateral head of the gastrocnemius sits higher and slimmer than the medial head. It frames the outer sweep of the calf, then tucks sharply into the Achilles tendon, creating a crisp plane break that contrasts with the rounder medial bellies.