Lower limb
Periarticular knee bursae and tendon insertions (Pes anserine, semimembranosus, biceps femoris, subpopliteal)
Bursae et tendines periarticulares genus (Pes anserinus, Semimembranosus, Biceps femoris, Popliteus)
- Origin
- Between pes anserinus tendons (sartorius, gracilis, semitendinosus) and medial tibia; deep to semimembranosus; around biceps femoris at fibular head; subpopliteal recess
- Insertion
- Underlying tibial, fibular, and capsular structures
- Function
- Prevents friction of hamstring, pes anserine, and popliteus tendons during knee kinematics and anchors flexor forces
- Innervation
- Tibial, saphenous (femoral), and common fibular nerves (L3–S1)
- Movement & chain
- Smooth gliding during flexion, extension, and tibial rotation
- Palpation
- Pes anserine bursa point tenderness 4–5 cm distal to medial joint line
- Clinical
- Pes anserine bursitis/tendinopathy (common in runners and knee OA patients); Baker's cyst (semimembranosus-gastrocnemius bursal distension); biceps femoris bursitis.
- Segmental innervation
- L3–S1
- In clinical practice
- Ultrasound-guided anserine injection, hamstring/adductor stretching, and treating primary intra-articular knee pathology
- Region in the model
- Lower limb