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Gastrocnemius muscle

Synonyms: biventer muscle of the calf, bipennate muscle of the lower leg
German: Musculus gastrocnemius

1 Definition

The gastrocnemius muscle is a skeletal muscle that belongs to the muscles of the lower leg. It works closely together with the soleus muscle, which is why both muscles are summarized as trizeps surae muscle in anatomical literature.

2 Anatomy

The gastrocnemius muscle has two muscle heads, the Caput mediale (medial head) and Caput laterale (lateral head).

2.1 Origin

The medial head has its origin at the medial epicondyle of the femur, the lateral head at the lateral epicondyle of the femur.

2.2 Insertion

The gastrocnemius muscle inserts at the tuber calcanei of the calcaneus.

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2.3 Innervation

It is innervated by the tibial nerve from the sciatic nerve segments S1 and S2.

3 Function

The gastrocnemius muscle causes a plantar flexion and supination of the foot, as well as a flexion of the knee joint.

Specialties: Anatomy

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