Popliteus
Leg & Ankle
The key that 'unlocks' your knee — it rotates your shin inward to initiate bending.
Function
'Unlocks' the knee from full extension by medially rotating tibia
Origin
Lateral femoral condyle and lateral meniscus
Insertion
Posterior proximal tibia above soleal line
Innervation
Tibial nerve (L4-S1)