Clinical Usefulness of Computer Assisted Line Bisection Task for the Assessment of Sensory-Attenional Aspect of Visuospatial Neglect

Park, Sung Joon; Lee, Hee Dae; Min, Su Jung; Park, Se Hun; Lee, Peter K W; Kim, Yun Hee

Abstract

OBJECTIVE
To assess the clinical usefulness of computer- assisted line bisection task for the patients with sensory- attentional visuospatial neglect. METHOD: Forty patients with unilateral hemispheric stroke (25 right, 15 left) and 15 normal age-matched subjects participated in this study. Computer-assisted line bisection task (CALBT) was designed using modified Milner landmark test to assess the sensory-attentional aspect of visuospatial neglect. Accuracy of response and reaction time for the transected lines, and response rate for the bisected lines were measured. Correlation between the results of CALBT and conventional line bisection test and Albert test was evaluated.
RESULTS
In patients with right hemispheric lesion, results of CALBT demonstrated shifting of attention to the right hemifield and neglect of the stimulus in the left hemifield. In contrast, patients with left hemispheric lesion showed significantly decreased attention to the right hemifield and shifting of attention to the left hemifield. Performances of CALBT correlated with the line bisection test, but not with the Albert test.
CONCLUSION
Computed assisted line bisection task can be used for the quantitative assessment of the sensory attentional aspect of visuospatial attention in patients with unilateral neglect.