Pes anserinus (leg)

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Pes anserinus (leg)
Muscles of the gluteal and posterior femoral regions. Area of pes anserinus is encircled at bottom. sartorius, gracilis and semitendinosus are labeled at bottom left.
Dorlands/Elsevier p_15/12630561

The pes anserinus ("goose's foot") is the insertion of the conjoined tendons of three muscles onto the anteromedial proximal tibia bone (from anterior to posterior):[1]

The conjoined tendon lies superficial to the tibial insertion of the medial collateral ligament (MCL) of the knee.


A good mnemonic to remember the muscles which contribute tendons to this conjoint tendon and the innervations of these muscles is SGT FOS (sergeant FOS)

S- Sartorius G- Gracilis T- semiTendinosus (from lateral to medial)

F- femoral nerve O- obturator nerve S- sciatic nerve

Notice the order of the muscles (S, G, T) follows the order of the innervating nerves which correspond to those muscles (F, O, S)

Clinicial significance

It is a major cause of chronic knee pain and weakness ("pes anserinus bursitis").[2][3]


  1. Mnemonic at 3447
  2. pmr/104 at eMedicine - "Pes anserinus bursitis"
  3. ORT249 at FPnotebook - "Pes Anserine Bursitis"

External links