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Researchers studied the effects of various metronomic stimuli (a mechanically produced beat) on fifteen healthy adults, ages 18 to 30. Walkers participated in two sessions consisting of five 15-minute trials in which the participants walked with different cues.

In the first, participants walked at their preferred walking speed. Then, in subsequent trials, participants were asked to walk to a metronomic beat, produced by way of visuals, sound, or touch. Finally, participants were asked to walk with all three cues simultaneously, the pace of which was set to that of the first trial.

“We found that the auditory cue had the greatest influence on human gait, while the visual cues had no significant effect whatsoever,” says Ervin Sejdic, an assistant professor of engineering at the University of Pittsburgh, who reports findings in the journal PLoS One.

“This finding could be particularly helpful for patients with Parkinson’s disease, for example, as auditory cues work very well in their rehabilitation.”

With illnesses like Parkinson’s disease—a brain disorder leading to shaking (tremors) and difficulty walking—a big question is whether researchers can better understand the changes that come with deterioration.

“Oftentimes, a patient with Parkinson’s disease comes in for an exam, completes a gait assessment in the laboratory, and everything is great,” says Sejdic. “But then, the person leaves and falls down. Why? Because a laboratory is a strictly controlled environment. It’s flat, has few obstacles, and there aren’t any cues (like sound) around us.

“When we’re walking around our neighborhoods, however, there are sidewalks, as well as streetlights and people honking car horns: you have to process all of this information together. We are trying to create that real-life space in the laboratory.”

In the future, Sejdic and his team would like to conduct similar walking trials with patients with Parkinson’s disease, to observe whether their gait is more or less stable.

“Can we see the same trends that we observed in healthy people?” he says. “And, if we observe the same trends, then that would have direct connotations to rehabilitation processes.”

The team feels that visual cues could be considered as an alternative modality in rehabilitation and should be further explored in the laboratory. Additionally, they plan to explore the impact of music on runners and walkers.

Funding for this project was provided, in part, by the University of Pittsburgh, the University of Toronto, and Holland Bloorview Kids Rehabilitation Hospital.

Source: University of Pittsburgh