Biomechanics

Heel-strike = IR tibia, calcaneal eversion, unlocking TN + CC joints = foot pronation to decelerate impact of weightbearing
Foot-flat = weightbearing axis through ASIS → patella → 2nd MT
Toe-off = ER tibia, calcaneus inverts, transverse tarsal joints locked (via pull tibialis posterior tendon) = rigid lever for gait
Flatfoot deformity = ↑stress on ligaments. Abducted everted foot can lead to tibialis anterior + Achilles tendons acting as evertors

Webpage Last Modified: 18 February, 2010