title: Cognitive-Motor Interference on Upper Extremity Motor Performance in a Robot-Assisted Planar Reaching Task Among Patients With Stroke.
abstract: To explore motor performance on 2 different cognitive tasks during robotic rehabilitation in which motor performance was longitudinally assessed.
  
  
  
  Prospective study.
  
  
  
  Rehabilitation hospital.
  
  
  
  Patients (N=22) with chronic stroke and upper extremity impairment.
  
  
  
  A total of 640 repetitions of robot-assisted planar reaching, 5 times a week for 4 weeks.
  
  
  
  Longitudinal robotic evaluations regarding motor performance included smoothness, mean velocity, path error, and reach error by the type of cognitive task. Dual-task effects (DTEs) of motor performance were computed to analyze the effect of the cognitive task on dual-task interference.
  
  
  
  Cognitive task type influenced smoothness (P=.006), the DTEs of smoothness (P=.002), and the DTEs of reach error (P=.052). Robotic rehabilitation improved smoothness (P=.007) and reach error (P=.078), while stroke severity affected smoothness (P=.01), reach error (P<.001), and path error (P=.01). Robotic rehabilitation or severity did not affect the DTEs of motor performance.
  
  
  
  The results provide evidence for the effect of cognitive-motor interference on upper extremity performance among participants with stroke using a robotic-guided rehabilitation system.
authors.affiliation: Department of Rehabilitation Medicine, National Rehabilitation Center, Ministry of Health and Welfare, Seoul, Republic of Korea; Translational Research Center for Rehabilitation Robots, National Rehabilitation Center, Ministry of Health and Welfare, Seoul, Republic of Korea. Electronic address: asfreelyas@gmail.com.
authors.forename: Joon-Ho
authors.initials: JH
authors.lastname: Shin
authors.affiliation: Translational Research Center for Rehabilitation Robots, National Rehabilitation Center, Ministry of Health and Welfare, Seoul, Republic of Korea.
authors.forename: Gyulee
authors.initials: G
authors.lastname: Park
authors.affiliation: Translational Research Center for Rehabilitation Robots, National Rehabilitation Center, Ministry of Health and Welfare, Seoul, Republic of Korea.
authors.forename: Duk Youn
authors.initials: DY
authors.lastname: Cho
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011597:Psychomotor Performance; D020127:Recovery of Function; D012371:Robotics / Q000379:methods*; D000071939:Stroke Rehabilitation / Q000379:methods*; D034941:Upper Extremity / Q000503:physiopathology*
keywords: Cognition; Cognitive-motor interference; Dual task; Motor skills; Rehabilitation; Stroke