Impact Of Beat Frequency in Rhythmic Auditory Stimulation un The Effectiveness of Motor Imagery in Stroke Rehabilitation
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N\AAbstract
Background: Motor Imagery (MI) combined with Rhythmic Auditory Stimulation (RAS) is an emerging approach in stroke rehabilitation. However, the optimal tempo for RAS remains unclear. This study evaluates the impact of beat frequency slow (50 bpm) vs fast (90 bpm) on motor outcomes when used with MI in stroke rehabilitation, while using a CIMT group as constant for comparison.
Methods: Forty post-stroke patients were randomized into three groups. Group A (n=20) received CIMT. Group B1 (n=10) practiced MI with slow RAS (50 bpm), and Group B2 (n=10) with fast RAS (90 bpm). All interventions lasted 16 weeks. STREAM and MMT scores were recorded at baseline and at the end of treatment.
Results: All groups showed significant improvement. However, Group B1 (slow RAS) showed better coordination and motor planning outcomes than B2 (fast RAS). CIMT group showed overall higher muscle strength gains.
Conclusion: Slow rhythmic cues (50 bpm) enhanced the effectiveness of Motor Imagery more than fast rhythms. Beat frequency should be considered in RAS-based stroke rehabilitation protocols.
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