Article Text

other Versions

PDF
From both sides now: crossover effects influence navigation in patients with unilateral neglect
  1. T D Punt (d.punt{at}leedsmet.ac.uk)
  1. Leeds Metropolitan University, United Kingdom
    1. K Kitadono (kxk352{at}bham.ac.uk)
    1. The University of Birmingham, United Kingdom
      1. J Hulleman (j.hulleman{at}hull.ac.uk)
      1. The University of Hull, United Kingdom
        1. G W Humphreys (g.w.humphreys{at}bham.ac.uk)
        1. The University of Birmingham, United Kingdom
          1. M J Riddoch (m.j.riddoch{at}bham.ac.uk)
          1. University of Birmingham, United Kingdom

            Abstract

            Unilateral neglect is a challenging disorder that pervades a range of behaviours following stroke and hampers recovery. While a preponderance of clinical studies measure performance on a range of bedside assessments including line bisection and cancellation tasks, there have been calls for studies to embrace more relevant functional measures. Here, for the fist time, we present data from two separate tasks that characterise the performance of seven patients with unilateral neglect when navigating a power chair. The tasks involved negotiating an obstacle course and steering a central path between gaps of different sizes. Results from the obstacle course confirmed the clinical observation and predicted bias of contralesional errors. However, the second task revealed a robust ‘crossover’ effect. Patients deviated to the ipsilesional side for large gaps but deviated increasingly contralesionally when steering through small gaps in behaviour analogous to that previously shown on line bisection tasks. Contrary to being seen as an unintuitive finding, further analysis of these errors suggest patients are giving disproportionate weight to the location of the ipsilesional object when plotting a midline course between two objects. Our results provide a platform for further studies to investigate the modulation and rehabilitation of this important skill.

            • crossover
            • navigation
            • neglect syndrome
            • stroke
            • unilateral neglect

            Statistics from Altmetric.com

            Request permissions

            If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.

            Linked Articles

            • Editorial commentary
              Elizabeth Coulthard Masud Husain