Pes anserinus

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(For first meaning) Muscles of the gluteal and posterior femoral regions. (sartorius, gracilis and semitendinous labeled at bottom left.)

(For second meaning) Plan of the facial and intermediate nerves and their communication with other nerves. (Branches of facial nerve visible at bottom center.)

Pes anserinus ("goose's foot") is the anatomic term used to describe two different structures:

1. The term describes the insertion of the conjoined tendons of (from anterior to posterior) the sartorius, gracilis and semitendinous muscles onto the anteromedial proximal tibia bone. The conjoined tendon lies superficial to the tibial insertion of the medial collateral ligament (MCL) of the knee and is a major cause of chronic knee pain and weakness (pes anserinus bursitis).
2. It is also the term for the branch point of the facial nerve (extratemporal) after it leaves the stylomastoid foramen. This division takes place within the parotid gland. Commonly, it divides into the temporozygomatic and cervicofacial branches (several variations).

[edit] External links

• Duke Orthopedics pes_anserinus
• eMedicine pmr/104 - "Pes anserinus bursitis"
• FPnotebook ORT242 - "Pes Anserine Bursitis"
• Description at rad.washington.edu

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