Which of the following is the primary site of origin of the plantar fascia?
- A Medial process of the calcaneal tuberosity ✓
- B Lateral process of the calcaneal tuberosity
- C Sustentaculum tali
- D Tuberosity of the navicular
Correct answer: A. Medial process of the calcaneal tuberosity
Explanation
The plantar fascia is a thick aponeurosis that originates chiefly from the medial process of the calcaneal tuberosity and fans forward to divide into five bands that attach to the toes. It functions as a tie-rod supporting the longitudinal arch and acts via the windlass mechanism during toe extension. The lateral process gives origin to part of the abductor digiti minimi, the sustentaculum supports the spring ligament complex, and the navicular tuberosity receives the tibialis posterior tendon.
Reference: Campbell's Operative Orthopaedics, 14th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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