The Effect of External and Internal Focus of Attention on Gait Variability in Older Adults

REFERENCES

• Beauchet, O., Dubost, V., Herrmann, F. R., & Kressig, R. W. (2005). Stride-to-stride variability while backward counting among healthy young adults. Journal of NeuroEngineering and Rehabilitation, 2, 26.
   PubMedGoogle Scholar
• Chiviacowsky, S., Wulf, G., & Wally, R. (2010). An external focus of attention enhances balance learning in older adults. Gait & Posture, 32, 572–575. doi:10.1016/j.gaitpost.2010.08.004
   PubMed Web of Science ®Google Scholar
• del Olmo, M. F., & Cudeiro, J. (2005). Temporal variability of gait in Parkinson disease: effects of a rehabilitation programme based on rhythmic sound cues. Parkinsonism & Related Disorders, 11, 25–33.
   PubMed Web of Science ®Google Scholar
• Elkin-Frankston, S., Lebowitz, B. K., Kapust, L. R., Hollis, A. M., & O'Connor, M. G. (2007). The use of the Color Trails Test in the assessment of driver competence: preliminary report of a culture-fair instrument. Archives of Clinical Neuropsychology, 22, 631–635. doi:10.1016/j.acn.2007.04.004
   PubMed Web of Science ®Google Scholar
• Galili, T. (2010). Post hoc analysis for Friedman's Test (R code). Retrieved from http://www.r-statistics.com/2010/02/post-hoc-analysis-for-friedmans-test-r-code/
   Google Scholar
• Hausdorff, J. M. (2005). Gait variability: methods, modeling and meaning. Journal of NeuroEngineering and Rehabilitation, 2, 19.
   PubMedGoogle Scholar
• Hausdorff, J. M. (2007). Gait dynamics, fractals and falls: finding meaning in the stride-to-stride fluctuations of human walking. Human Movement Science, 26, 555–589.
   PubMed Web of Science ®Google Scholar
• Hausdorff, J. M. (2009). Gait dynamics in Parkinson's disease: common and distinct behavior among stride length, gait variability, and fractal-like scaling. Chaos, 19(2), 026113. doi:10.1063/1.3147408
   PubMed Web of Science ®Google Scholar
• Hausdorff, J. M., Cudkowicz, M. E., Firtion, R., Wei, J. Y., & Goldberger, A. L. (1998). Gait variability and basal ganglia disorders: stride-to-stride variations of gait cycle timing in Parkinson's disease and Huntington's disease. Movement Disorders, 13, 428–437.
   PubMed Web of Science ®Google Scholar
• Hausdorff, J. M., Edelberg, H. K., Mitchell, S. L., Goldberger, A. L., & Wei, J. Y. (1997). Increased gait unsteadiness in community-dwelling elderly fallers. Archives of Physical Medicine and Rehabilitation, 78, 278–283.
   PubMed Web of Science ®Google Scholar
• Hausdorff, J. M., Lowenthal, J., Herman, T., Gruendlinger, L., Peretz, C., & Giladi, N. (2007). Rhythmic auditory stimulation modulates gait variability in Parkinson's disease. European Journal of Neuroscience, 26, 2369–2375.
   PubMed Web of Science ®Google Scholar
• Hausdorff, J. M., Mitchell, S. L., Firtion, R., Peng, C. K., Cudkowicz, M. E., Wei, J. Y., & Goldberger, A. L. (1997). Altered fractal dynamics of gait: reduced stride-interval correlations with aging and Huntington's disease. Journal of Applied Physiology (1985), 82, 262–269.
   PubMed Web of Science ®Google Scholar
• Lezak, M. D. (1995). Neuropsychological assessment. New York, NY: Oxford University Press
   Google Scholar
• Mirelman, A., Maidan, I., Herman, T., Deutsch, J. E., Giladi, N., & Hausdorff, J. M. (2011). Virtual reality for gait training: can it induce motor learning to enhance complex walking and reduce fall risk in patients with Parkinson's disease? The Journals of Gerontology Series A: Biological Sciences and Medical Sciences, 66, 234–240. doi:10.1093/gerona/glq201
   PubMed Web of Science ®Google Scholar
• Morris, M. E., Iansek, R., Matyas, T. A., & Summers, J. J. (1996). Stride length regulation in Parkinson's disease. Normalization strategies and underlying mechanisms. Brain, 119, 551–568.
   PubMed Web of Science ®Google Scholar
• Nasreddine, Z. S., Phillips, N. A., Bedirian, V., Charbonneau, S., Whitehead, V., Collin, I., & Chertkow, H. (2005). The Montreal Cognitive Assessment, MoCA: a brief screening tool for mild cognitive impairment. Journal of the American Geriatrics Society, 53, 695–699.
   PubMed Web of Science ®Google Scholar
• Nieuwboer, A., Rochester, L., Muncks, L., & Swinnen, S. P. (2009). Motor learning in Parkinson's disease: limitations and potential for rehabilitation. Parkinsonism & Related Disorders, 15, S53–58. doi:10.1016/S1353-8020(09)70781-3
   PubMed Web of Science ®Google Scholar
• Oren, N., Yogev-Seligmann, G., Ash, E., Hendler, T., Giladi, N., & Lerner, Y. (2015). The Montreal cognitive assessment in cognitively-intact elderly: a case for age-adjusted cutoffs. Journal of Alzheimer's Disease, 43, 19–22.
   PubMed Web of Science ®Google Scholar
• Peper, C. L., Oorthuizen, J. K., & Roerdink, M. (2012). Attentional demands of cued walking in healthy young and elderly adults. Gait & Posture, 36, 378–382. doi:10.1016/j.gaitpost.2012.03.032
   PubMed Web of Science ®Google Scholar
• Podsiadlo, D., & Richardson, S. (1991). The timed “Up & Go”: a test of basic functional mobility for frail elderly persons. Journal of the American Geriatrics Society, 39, 142–148.
   PubMed Web of Science ®Google Scholar
• R Development Core Team. (2008). R: A language and environment for statistical computing. R Foundation for Statistical Computing
   Google Scholar
• Sheridan, P. L., Solomont, J., Kowall, N., & Hausdorff, J. M. (2003). Influence of executive function on locomotor function: divided attention increases gait variability in Alzheimer's disease. Journal of the American Geriatrics Society, 51, 1633–1637.
   PubMed Web of Science ®Google Scholar
• Springer, S., Giladi, N., Peretz, C., Yogev, G., Simon, E. S., & Hausdorff, J. M. (2006). Dual-tasking effects on gait variability: the role of aging, falls, and executive function. Movement Disorders, 21, 950–957.
   PubMed Web of Science ®Google Scholar
• Vuillerme, N., & Nafati, G. (2007). How attentional focus on body sway affects postural control during quiet standing. Psychological Research, 71, 192–200. doi:10.1007/s00426-005-0018-2
   PubMed Web of Science ®Google Scholar
• Willems, A. M., Nieuwboer, A., Chavret, F., Desloovere, K., Dom, R., Rochester, L., & Jones, D. (2007). Turning in Parkinson's disease patients and controls: the effect of auditory cues. Movement Disorders, 22, 1871–1878.
   PubMed Web of Science ®Google Scholar
• Wittwer, J. E., Webster, K. E., & Hill, K. (2013a). Music and metronome cues produce different effects on gait spatiotemporal measures but not gait variability in healthy older adults. Gait Posture, 37, 219–222. doi:10.1016/j.gaitpost.2012.07.006
   PubMed Web of Science ®Google Scholar
• Wittwer, J. E., Webster, K. E., & Hill, K. (2013b). Rhythmic auditory cueing to improve walking in patients with neurological conditions other than Parkinson's disease–what is the evidence? Disability and Rehabilitation, 35, 164–176. doi:10.3109/09638288.2012.690495
   PubMed Web of Science ®Google Scholar
• Wulf, G., Hoss, M., & Prinz, W. (1998). Instructions for motor learning: differential effects of internal versus external focus of attention. Journal of Motor Behavior, 30, 169–179. doi:10.1080/00222899809601334
   PubMed Web of Science ®Google Scholar
• Wulf, G., Lauterbach, B., & Toole, T. (1999). The learning advantages of an external focus of attention in golf. Research Quarterly for Exercise and Sport, 70, 120–126. doi:10.1080/02701367.1999.10608029
   PubMed Web of Science ®Google Scholar
• Wulf, G., McNevin, N. H., Fuchs, T., Ritter, F., & Toole, T. (2000). Attentional focus in complex skill learning. Research Quarterly for Exercise and Sport, 71, 229–239. doi:10.1080/02701367.2000.10608903
   PubMed Web of Science ®Google Scholar
• Wulf, G., & Prinz, W. (2001). Directing attention to movement effects enhances learning: a review. Psychonomic Bulletin and Review, 8, 648–660.
   PubMed Web of Science ®Google Scholar
• Wulf, G., Shea, C., & Lewthwaite, R. (2010). Motor skill learning and performance: a review of influential factors. Medical Education, 44, 75–84. doi:10.1111/j.1365-2923.2009.03421.x
   PubMed Web of Science ®Google Scholar
• Wulf, G., Shea, C., & Park, J. H. (2001). Attention and motor performance: preferences for and advantages of an external focus. Research Quarterly for Exercise and Sport, 72, 335–344. doi:10.1080/02701367.2001.10608970
   PubMed Web of Science ®Google Scholar
• Yogev, G., Giladi, N., Peretz, C., Springer, S., Simon, E. S., & Hausdorff, J. M. (2005). Dual tasking, gait rhythmicity, and Parkinson's disease: which aspects of gait are attention demanding? European Journal of Neuroscience, 22, 1248–1256.
   PubMed Web of Science ®Google Scholar
• Yogev-Seligmann, G., Giladi, N., Brozgol, M., & Hausdorff, J. M. (2012). A training program to improve gait while dual tasking in patients with Parkinson's disease: a pilot study. Archives of Physical Medicine and Rehabilitation, 93, 176–181. doi:10.1016/j.apmr.2011.06.005
   PubMed Web of Science ®Google Scholar
• Yogev-Seligmann, G., Giladi, N., Gruendlinger, L., & Hausdorff, J. M. (2013). The contribution of postural control and bilateral coordination to the impact of dual tasking on gait. Experimental Brain Research, 226, 81–93. doi:10.1007/s00221-013-3412-9
   PubMed Web of Science ®Google Scholar
• Yogev-Seligmann, G., Rotem-Galili, Y., Dickstein, R., Giladi, N., & Hausdorff, J. M. (2012). Effects of explicit prioritization on dual task walking in patients with Parkinson's disease. Gait Posture, 35, 641–646. doi:10.1016/j.gaitpost.2011.12.016
   PubMed Web of Science ®Google Scholar
• Yogev-Seligmann, G., Rotem-Galili, Y., Mirelman, A., Dickstein, R., Giladi, N., & Hausdorff, J. M. (2010). How does explicit prioritization alter walking during dual-task performance? Effects of age and sex on gait speed and variability. Physical Therapy, 90, 177–186. doi:10.2522/ptj.20090043
   PubMed Web of Science ®Google Scholar
• Zachry, T., Wulf, G., Mercer, J., & Bezodis, N. (2005). Increased movement accuracy and reduced EMG activity as the result of adopting an external focus of attention. Brain Research Bulletin, 67, 304–309. doi:10.1016/j.brainresbull.2005.06.035
   PubMed Web of Science ®Google Scholar