What question did this study set out to answer?

The study aims to explore the relationship between festination, freezing of gait (FOG), and underlying motor deficits in Parkinson disease.

The sequence effect and gait festination in Parkinson disease: Contributors to freezing of gait?

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Randomized trial investigates gait freezing in Parkinson disease, suggesting multiple contributing factors.

The study aims to explore the relationship between festination, freezing of gait (FOG), and underlying motor deficits in Parkinson disease.
Investigated step-to-step amplitude in 10 Parkinson disease subjects with festination and FOG.
Examined four conditions: off levodopa, off with attentional strategies, off with visual cues, and on levodopa.
Evaluated the effects of these conditions on motor performance and variability.
Participants exhibited a significant sequence effect (F = 6.24; P = 0.001), reversible only through visual cues.
Levodopa, attentional strategies, and visual cues improved hypokinesia in various ways.
Marked variability in responses to interventions was observed within and between participants.

Iansek et al. (2006) studied this question.

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