- Thigh (Inner)
- Tailor's muscle
- Longest muscle in body
- Iliac Spine (Anterior Superior)
- Medial Condyle (Anterior)
The biarticulate sartorius enters passive insufficiency through the completion of knee extension when the hips are more extended and internally rotated or through the completion of hip flexion and internally rotated when the knees are more extended. The biarticulate sartorius enters active insufficiency through the completion of knee flexion when the hips are more flexed and externally rotated ( hamstrings become more active) or through the completion of hip flexion and external rotation when the knees are more flexed (other hip flexors become more active).