One important measurement that bio mechanic specialists evaluate is the relationship of the first metatarsal to the second metatarsal head. The foot should be centered under the ankle joint (therefore not pronated or supinated). One thumb on bottom and index finger on top grab the second metatarsal head and stabilize it. This will be the reference point. With the other hand, grab the first metatarsal head also from top and bottom. See where the first metatarsal head lies in relation to the second metatarsal head when the thumb fingernails are parallel. Then move the first metatarsal head up and down noting the overall motion and position. The motion is ideally 5 mm up and 5 mm down. In this patient, the left first metatarsal moved only 2 mm total (4 mm down and -2 mm up). This is called a stable plantar flexed first ray. Ideally the first and fifth metatarsal heads are lower than their adjacent metatarsals. |
Welcome to the Podiatry Blog of Dr Richard Blake of San Francisco. I hope the pages can help you learn about caring for foot injuries, or help you with your own injury.
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Wednesday, June 26, 2013
First Metatarsal Position: Important to Know with Metatarsal Problems
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