Upper extremity 3-dimensional reachable workspace assessment in amyotrophic lateral sclerosis by Kinect sensor

Bjorn Oskarsson, Nanette C. Joyce, Evan De Bie, Alina Nicorici, Ruzena Bajcsy, Gregorij Kurillo, Jay J. Han

Research output: Contribution to journalArticle

10 Scopus citations


Introduction: Reachable workspace is a measure that provides clinically meaningful information regarding arm function. In this study, a Kinect sensor was used to determine the spectrum of 3-dimensional reachable workspace encountered in a cross-sectional cohort of individuals with amyotrophic lateral sclerosis (ALS). Methods: Bilateral 3D reachable workspace was recorded from 10 subjects with ALS and 17 healthy controls. The data were normalized by each individual's arm length to obtain a reachable workspace relative surface area (RSA). Concurrent validity was assessed by correlation with scoring on the ALS Functional Rating Score-revised (ALSFRSr). Results: The Kinect-measured reachable workspace RSA differed significantly between the ALS and control subjects (0.579 ± 0.226 vs. 0.786 ± 0.069; P < 0.001). The RSA demonstrated correlation with ALSFRSr upper extremity items (Spearman correlation ρ = 0.569; P = 0.009). With worsening upper extremity function, as categorized by the ALSFRSr, the reachable workspace also decreased progressively. Conclusions: This study demonstrates the feasibility and potential of using a novel Kinect-based reachable workspace outcome measure in ALS.

Original languageEnglish (US)
Pages (from-to)234-241
Number of pages8
JournalMuscle and Nerve
Issue number2
StatePublished - Feb 1 2016
Externally publishedYes



  • ALS
  • Kinect
  • Outcome measure
  • Reachable workspace
  • Upper extremity

ASJC Scopus subject areas

  • Physiology
  • Clinical Neurology
  • Cellular and Molecular Neuroscience
  • Physiology (medical)

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