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Sesamoid bones of metatarsal 1
Other Terms: Os sesamoideum, Os sésamoïde
These small bones arise as compression struts in the split tendon of the flexor hallucis brevis muscle. They sit on the grooved plantar facets at the head end of the bone.
The word sesamoid arises from the Greek sesame for seeds. These small bones occurring within certain tendons reminded Galen of sesame seeds, so he named them after this fact.