Effect of Rhythmic Auditory Cuing on Temporal Stride Parameters and EMG Patterns in Normal Gait

Abstract

This research investigated the effect of auditory (musical) rhythm on temporal parameters of the stride cycle and electromyographic (EMG) activity in normal gait at three different walking cadences. Sixteen normal subjects were studied. For each walking cadence, a baseline walk without rhythm and a walk with rhythmic cuing, matched to the baseline tempo, were measured. Surface EMG and a dual walkway, consisting of pressure-sensitive switch mats, were used to record data. Results showed several significant (p < 0.05) changes with rhythmic cuing: a) improved stride rhythmicity between right and left lower limbs; b) delayed onset of gastrocnemius EMG; c) shortened duration of gastrocnemius EMG; d) decreased variation in timing of gastrocnemius EMG; e) increased integrated amplitude ratios for gastrocnemius EMG. Data suggest that auditory rhythm as peripheral timing signal improved stride rhythmicity and effected muscle activity by producing more focused motor unit recruitment patterns.