Soleus

Summary

Origins

• Posterior surface of tibia (soleal line)
• Posterior surface of fibula

Insertions

• Calcaneus via Achilles tendon

Actions

• Plantarflexes the foot
• Stabilizes the leg when standing

The soleus is a broad, flat muscle beneath the gastrocnemius that helps form the calf's bulk. Together with the gastrocnemius, it forms the triceps surae, providing powerful plantarflexion for pushing off the ground.

Key Features

• Function: Maintains posture and enables walking by plantarflexing the foot.
• Shape: Lies deep to the gastrocnemius but still contributes to the calf's contour.
• Landmarks: Merges into the Achilles tendon with the gastrocnemius.

References

• Soleus (Wikipedia)
• Gastrocnemius