Plantarflexion
Pronunciation: plan-tar-FLEK-shun
Movement at the ankle joint in which the plantar surface of the foot is directed downward, away from the anterior leg, as in pointing the toes.
Full Definition
Plantarflexion describes the motion at the talocrural joint that moves the foot and toes downward (inferiorly), increasing the angle between the dorsum of the foot and the shin. It is the direct anatomical and editorial opposite of dorsiflexion. In orthotic reports, excessive or involuntary plantarflexion (equinus) is a common indication for AFO prescription. Editors should note that 'plantarflexion' is the preferred single-word spelling, not 'plantar flexion' (two words) or 'plantar-flexion' (hyphenated), though all three forms appear in the literature; house style should be applied consistently.
Usage
Usage note: Preferred closed-form spelling is 'plantarflexion' (one word). Flag 'plantar flexion' and 'plantar-flexion' as variants needing harmonisation per house style.
In Context
- "The solid AFO was set in slight plantarflexion to promote a knee-extension moment during stance." — Orthotic clinical note
- "House style uses 'plantarflexion' as one word; flag any instances of 'plantar flexion' for consistency." — Copy-editing checklist