windlass effect

windlass effect

increased sagittal-plane curvature of the medial longitudinal arch at toe off, with increased plantar fascia tension, facilitating effective gait; plantar fascia insertions (as slip into plantar aspects of toes, via the flexor sheaths) are pulled distally as metatarsophalangeal joints/toes dorsiflex (e.g. at toe off), causing tension in the plantar aponeurosis (Figure 1)
Figure 1: Windlass effect. This article was published in Neale's Disorders of the Foot, Lorimer, French, O'Donnell, Burrow, Wall, Copyright Elsevier, (2006).