Reachable workspace and performance of upper limb (PUL) in duchenne muscular dystrophy

Jay J. Han, Evan de Bie, Alina Nicorici, Richard T. Abresch, Colleen Anthonisen, Ruzena Bajcsy, Gregorij Kurillo, Craig M McDonald

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Introduction: The Kinect-based reachable workspace relative surface area (RSA) is compared with the performance of upper limb (PUL) assessment in Duchenne muscular dystrophy (DMD). Methods: 29 individuals with DMD (ages: 7-23; Brooke: 1-5) underwent both Kinect-based reachable workspace RSA and PUL assessments. RSAs were also collected from 24 age-matched controls. Total and quadrant RSAs were compared with the PUL total, shoulder-, middle-, and distal-dimension scores. Results: The total reachable workspace RSA correlated well with the total PUL score (Spearman ρ = -0.602; P < 0.001), and with each of the PUL dimensional scores: shoulder (ρ = -0.624; P < 0.001), middle (ρ = -0.564; P = 0.001), and distal (ρ = -0.630; P < 0.001). With quadrant RSA, reachability in a particular quadrant was closely associated with respective PUL dimensional-level function (lateral-upper quadrant for shoulder-, lateral-upper/lower quadrants for middle-, and lateral-lower quadrant for distal-level function). Conclusions: This study demonstrates concurrent validity of the reachable workspace outcome measure (RSA) with the DMD-specific upper extremity outcome measure (PUL).

Original languageEnglish (US)
Pages (from-to)545-554
Number of pages10
JournalMuscle and Nerve
Issue number4
StatePublished - Apr 1 2016


  • DMD
  • Kinect
  • PUL
  • Reachable workspace
  • Upper extremity

ASJC Scopus subject areas

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


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