peroneal retinaculum

noun

Medical Definition of peroneal retinaculum 

: either of two bands of fascia that support and bind in place the tendons of the peroneus longus and peroneus brevis muscles as they pass along the lateral aspect of the ankle:

a : one that is situated more superiorly

called also superior peroneal retinaculum

b : one that is situated more inferiorly

called also inferior peroneal retinaculum

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