Dual-task paradigms are used to investigate gait and cognitive declines in older adults (OA). Optic-flow is a virtual reality environment where the scene flows past the subject while walking on a treadmill, mimicking real-life locomotion.
To investigate cost of environment (no optic-flow v. optic-flow) while completing single- and dual-task walking and dual-task costs (DTC; single- v. dual-task) in optic-flow and no optic-flow environments.
Twenty OA and seven younger adults (YA) walked on a self-paced treadmill in 3-min segments per task and both environments. Five task conditions included: no task, semantic fluency (category), phonemic fluency (letters), word reading, and serial-subtraction.
OAs had a benefit of optic-flow compared to no optic-flow for step width (p = 0.015) and step length (p = 0.045) during letters compared to the YA. During letters, OA experienced improvement in step width DTC; whereas YA had a decrement in step width DTC from no optic-flow to optic-flow (p = 0.038). During serial-subtraction, OA had less step width DTC when compared to YA in both environments (p = 0.02).
During letters, step width and step length improved in OA while walking in optic-flow. Also, step width DTC differed between the two groups. Sensory information from optic-flow appears to benefit OA. Letters relies more on verbal ability and word knowledge, which are preserved in aging. However, YA use a complex speech style during dual tasking, searching for complex words and an increased speed of speech.
OA can benefit from optic-flow by improving spatial gait parameters, specifically, step width, during dual-task walking.
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Bergen G, Stevens MR, Burns ER (2016) Falls and fall injuries among adults aged ≥ 65 years—united states, 2014. MMWR Morb Mortal Wkly Rep 65:993–998. https://doi.org/10.15585/mmwr.mm6537a2
Springer S, Giladi N, Peretz C, Yogev G, Simon ES, Hausdorff JM (2006) Dual-tasking effects on gait variability: The role of aging, falls, and executive function. Mov Disord 21:950–957. https://doi.org/10.1002/mds.20848
Glisky EL (2007) Changes in cognitive function in human aging. In: Riddle DR (ed) Brain aging: Models, methods, and mechanisms. CRC Press/Taylor & Francis, Boca Raton
Woollacott M, Shumway-Cook A (2002) Attention and the control of posture and gait: a review of an emerging area of research. Gait Posture 16:1–14. https://doi.org/10.1016/S0966-6362(01)00156-4
Lundin-Olsson L, Nyberg L, Gustafson Y (1997) “Stops walking when talking” as a predictor of falls in elderly people. Lancet 349:2. https://doi.org/10.1016/S0140-6736(97)24009-2
Walshe EA, Patterson MR, Commins S, Roche RA (2015) Dual-task and electrophysiological markers of executive cognitive processing in older adult gait and fall-risk. Front Hum Neurosci 9:200. https://doi.org/10.3389/fnhum.2015.00200
Lindenberger U, Marsiske M, Baltes PB (2000) Memorizing while walking: increase in dual-task costs from young adulthood to old age. Psychol Aging 15:417–436
Holtzer R, Mahoney JR, Izzetoglu M et al (2011) fNIRS study of walking and walking while talking in young and old individuals. J Gerontol Ser A Biol Sci Med Sci 66:879–887. https://doi.org/10.1093/gerona/glr068
Gibson JJ (1958) Visually controlled locomotion and visual orientation in animals. Br J Psychol 49:182–194
Sloot LH, van der Krogt MM, Harlaar J (2014) Effects of adding a virtual reality environment to different modes of treadmill walking. Gait Posture 39:939–945. https://doi.org/10.1016/j.gaitpost.2013.12.005
Levy F, Leboucher P, Rautureau G et al (2016) Fear of falling: efficacy of virtual reality associated with serious games in elderly people. Neuropsych Dis Treat 12:877–881. https://doi.org/10.2147/NDT.S97809
Parijat P, Lockhart TE, Liu J (2015) Effects of perturbation-based slip training using a virtual reality environment on slip-induced falls. Ann Biomed Eng 43:958. https://doi.org/10.1007/s10439-014-1128-z
Wechsler D (1981) Manual for the wechsler adult intelligence scale-revised. Psychological Corporation, New York
Schaie KW (1985) Schaie-thurstone adult mental abilities test (STAMAT). Consulting Psychologists Press, Palo Alto
Nasreddine ZS, Phillips NA, Bedirian V et al (2005) The montreal cognitive assessment, MoCA: a brief screening tool for mild cognitive impairment. J Am Geriatr Soc 53:695–699. https://doi.org/10.1111/j.1532-5415.2005.53221.x
REITAN RM (1955) The relation of the trail making test to organic brain damage. J Consult Psychol 19:393–394
Podsiadlo D, Richardson S (1991) The timed “up & go”: A test of basic functional mobility for frail elderly persons. J Am Geriatr Soc 39:142–148
Hernandez D, Rose DJ (2008) Predicting which older adults will or will not fall using the fullerton advanced balance scale. Arch Phys Med Rehabil 89:2309–2315. https://doi.org/10.1016/j.apmr.2008.05.020
Wiens C, Denton W, Schieber M et al (2017) Reliability of a feedback-controlled treadmill algorithm dependent on the user’s behavior. Proc IEEE Int Conf Electro Inf Technol. https://doi.org/10.1109/EIT.2017.8053423
Troyer AK, Moscovitch M, Winocur G (1997) Clustering and switching as two components of verbal fluency: evidence from younger and older healthy adults. Neuropsychology 11:138–146. https://doi.org/10.1037//0894-418.104.22.168
Troyer AK (2000) Normative data for clustering and switching on verbal fluency tasks. J Clin Exp Neuropsychol 22:370–378. https://doi.org/10.1076/1380-3395(200006)22:3
Tombaugh TN, Kozak J, Rees L (1999) Normative data stratified by age and education for two measures of verbal fluency: FAS and animal naming. Arch Clin Neuropsychol 14:167–177. https://doi.org/10.1016/S0887-6177(97)00095-4
Borkowski JG, Benton AL, Spreen O (1967) Word fluency and brain damage. Neuropsychologia. https://doi.org/10.1016/0028-3932(67)90015-2
Uttl B (2002) North american adult reading test: Age norms, reliability, and validity. J Clin Exp Neuropsychol 24:1123–1137. https://doi.org/10.1076/jcen.24.8.1123.8375
Balota DA, Yap MJ, Cortese MJ et al (2007) The english lexicon project. Behav Res Methods 39:445–459
Diener HC, Nutt JG (1997) Vestibular and cerebellar disorders of equilibrium and gait. In: Masdeu JC, Sudarsky L, Wolfson L (eds) Gait disorders of aging: falls and therapeutic strategies. Lippincott-Raven, Philadelphia, pp 261–272
Gehlsen GM, Whaley MH (1990) Falls in the elderly: Part I, gait. Arch Phys Med Rehabil 71:735–738
Chamberlin ME, Fulwider BD, Sanders SL et al (2005) Does fear of falling influence spatial and temporal gait parameters in elderly persons beyond changes associated with normal aging? J Gerontol A Biol Sci Med Sci 60:1163–1167. https://doi.org/10.1093/gerona/60.9.1163
Jerome GJ, Ko SU, Kauffman D et al (2015) Gait characteristics associated with walking speed decline in older adults: Results from the baltimore longitudinal study of aging. Arch Gerontol Geriatr 60:239–243 https://doi.org/10.1016/j.archger.2015.01.007
Perrone JA, Stone LS (1994) A model of self-motion estimation within primate extrastriate visual cortex. Vis Res 34(21):2917–2938. https://doi.org/10.1016/0042-6989(94)90060-4
Sun HJ, Carey DP, Goodale MA (1992) A mammalian model of optic-flow utilization in the control of locomotion. Exp Brain Res 91:171–175
Warren WH, Kay BA, Zosh WD et al (2001) Optic flow is used to control human walking. Nat Neurosci 4:213–216. https://doi.org/10.1038/84054
Coslett HB, Bowers D, Verfaellie M et al (1991) Frontal verbal amnesia. Phonological amnesia. Arch Neurol 48:949–955
Hughes DL, Bryan J (2002) Adult age differences in strategy use during verbal fluency performance. J Clin Exp Neuropsychol 24:642–654. https://doi.org/10.1076/jcen.24.5.642.1002
Riddle DR (2007) Brain aging: models, methods, and mechanisms, 1st edn. CRC Press, Boca Raton
Vaportzis E, Georgiou-Karistianis N, Stout JC (2013) Dual task performance in normal aging: a comparison of choice reaction time tasks. PLoS One 8:e60265. https://doi.org/10.1371/journal.pone.0060265
Kemper S, Schmalzried R, Hoffman L et al (2010) Aging and the vulnerability of speech to dual task demands. Psychol Aging 25:949–962. https://doi.org/10.1037/a0020000
Fedorenko E, Gibson E, Rohde D (2007) The nature of working memory in linguistic, arithmetic and spatial integration processes. J Mem Lang 56:246–269. https://doi.org/10.1016/j.jml.2006.06.007
Kramer AF, Larish JL, Weber TA et al (1999) Training for executive control: task coordination strategies and aging. In: Gopher D, Koriat A (eds) Attention and performance XVII. MIT Press, Cambridge, pp 616–652
Andrade J, May J (2003) BIOS instant notes in cognitive psychology, 1st edn. CRC Press, London
The authors would like to thank Angie Helseth for her assistance in data collection and processing.
This work was supported by the National Institutes of Health (P20 GM109090 to SAM, JBB, JMY, and R01 HD090333 to SAM) and the University of Nebraska at Omaha Graduate Research and Creative Activity Fund (TL).
Conflict of interest
All authors declare they have no conflict of interest.
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
Informed consent was obtained from all individual participants included in the study.
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Phonemic (Letter) Fluency: F, L, S.
Semantic (Category) Fluency: Animals, Parts of the Body, Kitchen Utensils.
Serial Subtractions: 233, 650, 502.
Word reading: indices, hose, lamb, acquisitiveness, equivocal, fountain, corps, pout, subtle, détente, casserole, debt, browbeat, asked, statistics, epitome, shield, chord, flower, subpoena, banal, chrysanthemum, rarefy, diverse, irrelevant, generate, bell, eccentricities, bouquet, thyme.
Phonemic (Letter) Fluency: W, G, T.
Semantic (Category) Fluency: Sports, Furniture, Supermarket Items.
Serial Subtractions: 805, 297, 483.
Word Reading: asphyxiation, doll, paradigm, simile, reify, gauge, recipe, procreate, fifth, magnanimity, gouge, naïve, idyll, machine, hospital, sieve, youth, colony, cloud, façade, indict, confide, amicable, synthesis, deny, epic, fly, labile, crayon, clasped.
Phonemic (Letter) Fluency: M, B, R.
Semantic (Category) Fluency: Professions, Fruits & Vegetables, Things you Wear.
Serial Subtractions: 738, 369, 922.
Word Reading: ache, aisle, ballad, bibliography, caveat, cellist, colonel, courteous, curtain, debris, depot, efficacy, evolve, gigantic, gist, heir, hiatus, joker, ladder, lily, lingerie, nausea, placebo, pony, psalm, pugnacious, stranger, superfluous, yesterday, zealot.
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Leeder, T., Fallahtafti, F., Schieber, M. et al. Optic flow improves step width and length in older adults while performing dual task. Aging Clin Exp Res 31, 1077–1086 (2019). https://doi.org/10.1007/s40520-018-1059-x
- Dual task cost
- Virtual reality