fr-pl	flexor retinaculum-profound layer
fr-sl	flexor retinaculum-superficial layer
fr-ti	flexor retinaculum-tibial insertion
icn	inferior calcaneal nerve
lpa	lateral plantar artery
lpn	lateral plantar nerve
mcn	medial calcaneal nerve
mpa	medial plantar artery
mpn	medial plantar nerve
pa	plantar aponeurosis
pta	posterior tibial artery
SD	standard deviation
S-PMR	superficial plantar-medial release
tn	tibial nerve