Table 1.

Definition of the CAST MFM and the OFM hindfoot and forefoot segments

CAST MFM
	Proximal end		Distal end		A/P axis	M/L axis	Tracking markers
	Lateral	Medial	Lateral	Medial
Hindfoot	LMAL	MMAL	LCAL	STAL	Y	X	STAL, LCAL, HF1, HF2, CAL1
Forefoot	LCAL	STAL	D5MT	D1MT	Y	X	P1MT, P3MT, P5MT
OFM
	Plane 1		A/P axis		M/L axis		Tracking markers
Hindfoot	CAL1, CAL2, static midpoint between LCAL and STAL		From CAL1 in plane 1, parallel to the floor (Y)		Perpendicular to the plane 1 (X)		STAL, LCAL, CAL1, HF2
Forefoot	D1MT, D5MT, P5MT		Line from midpoint between P1MT and P5MT to TOE projected onto plane 1 (Y)		On plane 1, perpendicular to A/P axis (X)		P1MT, P5MT, D5MT, TOE

CAST Calibrated Anatomical System Technique, MFM Multi-segment foot model, OFM Oxford Foot Model, A/P Anterioposterior, M/L Mediolateral, Marker position: CAL1 and CAL2 Inferior and superior posterior aspect of calcaneus, respectively, HF1 and HF2 Medial and lateral hindfoot, respectively, STAL Sustentaculum tali, LCAL Lateral aspect of the calcaneus, MMAL and LMAL Medial and lateral malleoli, respectively, P1MT, P5MT, and P3MT Base of the 1st and 5th metatarsals, and between the base of the 3rd and the 4th metatarsals, respectively, D1MT and D5MT Medial first and lateral fifth metatarsal heads, respectively, TOE Mid-point of the distal heads of the 2nd and 3rd metatarsals