During single limb stance, the foot goes through what range of degrees for plantarflexion and dorsiflexion?

The correct range for plantarflexion and dorsiflexion during single limb stance is crucial for understanding the dynamics of balance and lower limb mechanics. In a normal single limb stance, the foot typically experiences a shift from about 5 degrees of plantarflexion to approximately 10 degrees of dorsiflexion. This range allows for adequate stability and support, facilitating proper weight distribution over the standing limb.

When in single limb stance, the body shifts its center of gravity and the ankle must adjust accordingly to maintain balance. The movement into mild dorsiflexion aids in engaging the anterior compartment muscles to stabilize the ankle and prevent the heel from lifting excessively. Such adjustments are vital for effective gait mechanics and support overall mobility.

Other ranges outlined in the choices do not accurately represent the typical motions observed in a normal single limb stance. The specific degrees stated in the correct choice align well with anatomical studies and biomechanical observations that highlight the subtleties in ankle positioning during weight-bearing activities. Understanding this range is essential for clinicians and practitioners working with rehabilitative methods, orthotic design, and lower limb assessments.