Extensor Hallucis Longus Muscle
Gastrocnemius Muscle – Attachments, Actions & Innervation
The gastrocnemius muscle is a leg muscle located at the calf that spans over both the knee and the ankle joint.
Attachments of Gastrocnemius Muscle: Origin & Insertion
Origin: (proximal attachments):
a. Medial head: medial condyle of femur and area just above condyle.
b. Lateral head: lateral condyle of femur and area just above condyle.
Insertion: (distal attachments):
Posterior calcaneus via calcaneal tendon.
Actions of Gastrocnemius Muscle:
a. Plantar flexes foot.
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b. Flexes the leg at the knee.
Nerve to Muscle and its Spinal Segment:
Tibial nerve (S1, S2).
Muscles That Act On Foot & Ankle (From Post. Leg Comp.)