Biceps Femoris – Essentials

Action

• Extends hip (long head)
• Flexes knee (both heads)
• Laterally rotates knee (when it is bent)
• Laterally rotates hip

Origins

• Ischial tuberosity (long head)
• Lateral lip linea aspera of femur (short head)

Insertions

• Head of fibula
• Lateral collateral ligament
• Lateral tibial condyle

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