The "floating door sign" in Parkinson's disease

O. Kulkarni, Kathrin LaFaver, D. Tarsy*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Individuals with Parkinson's disease (PD) display micrographia. We report a new method to elicit micrographic drawing in individuals with PD and compare this to drawing in individuals with essential tremor (ET). We asked 81 individuals with PD and 19 individuals with ET to draw a house and write a sentence. We examined house height and whether vertical lines of the door connected to the house floor. If both vertical door lines failed to reach the floor by more than 1mm we designated this a "floating door sign". House height of <5cm and letter height of <5mm were considered micrographic drawing and writing. 45 of 81 PD patients displayed a "floating door sign" compared with only 4 of 19 ET patients (p=0.0103). 24 of 81 PD patients compared with 1 of 19 ET patients had micrographic writing (p=0.0224). 60 of 81 PD patients compared with 9 of 19 ET patients had micrographic drawing (p=0.00526). The "floating door sign" correlated with micrographic writing (p=0.0275) but not micrographic drawing. The "floating door sign" had a positive predictive value for PD but not ET. We believe it correlates with hypometeric hand movements which cause inadequate stroke size, a phenomenon described in PD.

Original languageEnglish (US)
Pages (from-to)825-826
Number of pages2
JournalParkinsonism and Related Disorders
Volume19
Issue number9
DOIs
StatePublished - Sep 1 2013

Keywords

  • Essential tremor
  • Figuredrawing
  • Floating door
  • Micrographia
  • Parkinson's disease
  • Visuospatial skills

ASJC Scopus subject areas

  • Neurology
  • Geriatrics and Gerontology
  • Clinical Neurology

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