Measurement of Plantar Flexor Spasticity During Treatment with Tone-Reducing Casts

Abstract
The purpose of this study was to examine the hypothesis that treatment with short-leg, tone-reducing casts will alter resistance of the plantar flexors to dynamic and static stretch. The torque resisting passive dorsiflexion was measured at angular velocities of 0, 42, 60, and 120°/s for 16 spastic extremities. The short-term changes in dynamic sensitivity and static sensitivity were not significant. Longer-term wearing resulted in significant decreases in both dynamic sensitivity and static sensitivity. Thus, a change in resistance to stretch did occur with longer-term casting.

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