title: Postural control in hemodialysis patients.
abstract: The current investigation examined whether patients undergoing hemodialysis (HD) have reduced standing postural control performance during simultaneous cognitive task performance (i.e. dual task cost (DTC)) compared to age-gender matched controls. 19 persons undergoing HD and 19 age, gender, and body mass index (BMI) matched controls participated in the investigation. All participants performed 2 trials of quiet standing balance and 2 postural trials in which they performed a cognitive task. Postural control was indexed with various measures of the center of pressure (COP) trajectory. The change in postural control with a cognitive task (e.g. dual task cost DTC) was quantified as a change in the center of COP parameters of postural control from quiet standing to the cognitive condition. The primary observations were that (1) HD patients had significantly greater postural sway than age, gender, BMI matched controls (p's < 0.05); (2) HD patients had a greater DTC than the controls during quiet standing (p's < 0.05). The observations highlight that HD participants have poor postural control that is further exacerbated by a simultaneous performance of a cognitive task. It is possible that this impaired postural control places HD participants at elevated fall risk. Further study is necessary to determine contributing factors to an increased DTC in this population and whether targeted interventions such as exercise can reduce DTC.
authors.affiliation: Department of Biomedical Engineering, Kyung Hee Univeristy, Yongin, Republic of Korea.
authors.forename: Sunghoon
authors.initials: S
authors.lastname: Shin
authors.affiliation: Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, United States.
authors.forename: Hae Ryong
authors.initials: HR
authors.lastname: Chung
authors.affiliation: Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, United States.
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Fitschen
authors.affiliation: Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, United States.
authors.forename: Brandon M
authors.initials: BM
authors.lastname: Kistler
authors.affiliation: Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, United States.
authors.forename: Hyun Woo
authors.initials: HW
authors.lastname: Park
authors.affiliation: Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, United States.
authors.forename: Kenneth R
authors.initials: KR
authors.lastname: Wilund
authors.affiliation: Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, United States. Electronic address: jsosnoff@illinois.edu.
authors.forename: Jacob J
authors.initials: JJ
authors.lastname: Sosnoff
mesh_terms: D000328:Adult; D015992:Body Mass Index; D003071:Cognition / Q000502:physiology; D005260:Female; D005684:Gait / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009069:Movement Disorders / Q000503:physiopathology* / Q000534:rehabilitation; D004856:Postural Balance / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D011434:Proprioception / Q000502:physiology; D006435:Renal Dialysis; D051436:Renal Insufficiency, Chronic / Q000503:physiopathology* / Q000534:rehabilitation / Q000628:therapy*; D013647:Task Performance and Analysis
keywords: Kidney disease; Rehabilitation; Standing balance