{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T23:48:27Z","timestamp":1791416907344,"version":"4.3.3"},"reference-count":59,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2024,4,18]],"date-time":"2024-04-18T00:00:00Z","timestamp":1713398400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"NIH","award":["K01 HD088762"],"award-info":[{"award-number":["K01 HD088762"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>FXTAS is a neurodegenerative disorder occurring in some Fragile X Messenger Ribonucleoprotein 1 (FMR1) gene premutation carriers (PMCs) and is characterized by cerebellar ataxia, tremor, and cognitive deficits that negatively impact balance and gait and increase fall risk. Dual-tasking (DT) cognitive-motor paradigms and challenging balance conditions may have the capacity to reveal markers of FXTAS onset. Our objectives were to determine the impact of dual-tasking and sensory and stance manipulation on balance in FXTAS and potentially detect subtle postural sway deficits in FMR1 PMCs who are asymptomatic for signs of FXTAS on clinical exam. Participants with FXTAS, PMCs without FXTAS, and controls underwent balance testing using an inertial sensor system. Stance, vision, surface stability, and cognitive demand were manipulated in 30 s trials. FXTAS participants had significantly greater total sway area, jerk, and RMS sway than controls under almost all balance conditions but were most impaired in those requiring vestibular control. PMCs without FXTAS had significantly greater RMS sway compared with controls in the feet apart, firm, single task conditions both with eyes open and closed (EC) and the feet together, firm, EC, DT condition. Postural sway deficits in the RMS postural sway variability domain in asymptomatic PMCs might represent prodromal signs of FXTAS. This information may be useful in providing sensitive biomarkers of FXTAS onset and as quantitative balance measures in future interventional trials and longitudinal natural history studies.<\/jats:p>","DOI":"10.3390\/s24082586","type":"journal-article","created":{"date-parts":[[2024,4,18]],"date-time":"2024-04-18T06:21:12Z","timestamp":1713421272000},"page":"2586","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Potential Prodromal Digital Postural Sway Markers for Fragile X-Associated Tremor\/Ataxia Syndrome (FXTAS) Detected via Dual-Tasking and Sensory Manipulation"],"prefix":"10.3390","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5733-1922","authenticated-orcid":false,"given":"Emily C.","family":"Timm","sequence":"first","affiliation":[{"name":"Department of Anatomy & Cell Biology, Rush University Medical Center, Chicago, IL 60612, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicollette L.","family":"Purcell","sequence":"additional","affiliation":[{"name":"Department of Anatomy & Cell Biology, Rush University Medical Center, Chicago, IL 60612, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bichun","family":"Ouyang","sequence":"additional","affiliation":[{"name":"Department of Neurological Sciences, Rush University Medical Center, Chicago, IL 60612, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elizabeth","family":"Berry-Kravis","sequence":"additional","affiliation":[{"name":"Department of Anatomy & Cell Biology, Rush University Medical Center, Chicago, IL 60612, USA"},{"name":"Department of Neurological Sciences, Rush University Medical Center, Chicago, IL 60612, USA"},{"name":"Department of Pediatrics, Rush University Medical Center, Chicago, IL 60612, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Deborah A.","family":"Hall","sequence":"additional","affiliation":[{"name":"Department of Neurological Sciences, Rush University Medical Center, Chicago, IL 60612, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joan Ann","family":"O\u2019Keefe","sequence":"additional","affiliation":[{"name":"Department of Anatomy & Cell Biology, Rush University Medical Center, Chicago, IL 60612, USA"},{"name":"Department of Neurological Sciences, Rush University Medical Center, Chicago, IL 60612, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,4,18]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"830","DOI":"10.2310\/JIM.0b013e3181af59c4","article-title":"Fragile X-associated tremor\/ataxia syndrome: Clinical phenotype, diagnosis, and treatment","volume":"57","author":"Leehey","year":"2009","journal-title":"J. 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