title: Relative motions of the tibia, talus, and calcaneus during the stance phase of gait: a cadaver study.
abstract: The motions of the tibia, talus, and calcaneus during walking were analyzed three-dimensionally using a dynamic cadaver model that recreates the stance phase of walking. Rigid marker clusters were attached to each of the three bones, and the rotations of the talus and calcaneus with respect to the tibia and the calcaneus with respect to the talus were analyzed for eight right cadaver feet. The talus rotated primarily in plantarflexion/dorsiflexion about the talocrural joint, with an average range of 18 degrees +/- 4.7 degrees. The calcaneus began in inversion and internal rotation with respect to the tibia, moved into the neutral position at 28% of the stance phase and rotated primarily in plantarflexion from that point onward. Rotation of the calcaneus with respect to the talus at the subtalar joint occurred about all three axes, with approximately 5 degrees of relative dorsiflexion and 7 degrees of relative internal rotation. After 25% of stance, the talus and calcaneus moved together as one body into plantarflexion, providing a rigid lever as toe-off was approached.
authors.affiliation: Center for Locomotion Studies, Pennsylvania State University, 29 Recreation Building, University Park, PA 16802, USA.
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Hamel
authors.forename: Neil A
authors.initials: NA
authors.lastname: Sharkey
authors.forename: Frank L
authors.initials: FL
authors.lastname: Buczek
authors.forename: James
authors.initials: J
authors.lastname: Michelson
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002102:Cadaver; D002111:Calcaneus / Q000502:physiology*; D005260:Female; D005684:Gait / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009068:Movement; D012399:Rotation; D013628:Talus / Q000502:physiology*; D013977:Tibia / Q000502:physiology*