💪 Biceps Femoris

Brian Lee
Aug 27, 2025
Reviewed
Table of Contents

Summary

Origins
Long head: Ischial tuberosity of the 🦴 pelvis
Short head: Linea aspera of the 🦴 femur
Insertions
Head of the 🦴 fibula
Actions
Flexes the knee
Extends the hip (long head)
Laterally rotates the leg when the knee is flexed

Illustrations

Biceps femoris coloured in red (large head) and yellow (small
      head)
Fredrik x nilsson, CC BY-SA 4.0, via Wikimedia Commons

References