Biceps femoris muscle

Origin: Ventrocaudal end of the sacrotuberous ligament, lateral angle of the ischial tuberosity.

Insertion: Tibial tuberosity, tibial crest, medial tuberosity of the tuber calcanei via the calcaneal tendon.

Action: Antigravity in stance phase of locomotion, knee flexion at the start of the swing phase of locomotion and tarsal joint extension.

Nerve: Ischiadicus and ramus distalis of the gluteus caudalis nerve.