Fatigue versus disengagement in unilateral neglect.

Fatigue versus disengagement in unilateral neglect.

A letter cancellation task revealed neglect of the lower left quadrant when cancellation began at the top, but of the upper left quadrant when it began in the bottom. When the cancellation was done line by line through a "window" which covered all but the line currently worked on, the quadrant effects disappeared, so that fatigue could not explain these effects. An alternative hypothesis is tha...

Role of disengagement failure and attentional gradient in unilateral spatial neglect - a longitudinal study.

PURPOSE To assess the importance of 'disengagement failure' and 'attentional gradient' in unilateral spatial neglect (USN) and in recovery from neglect. METHOD Eight right-hemisphere-damaged stroke patients performed the standardized Behavioural-Inattention-Test battery for visual neglect, line-bisection tests, and two computerized reaction-time (RT) tasks: a variant of Posner's 'Spatial-Cuei...

Line versus representational bisections in unilateral spatial neglect.

OBJECTIVES To clarify the mechanisms of left unilateral spatial neglect found in the bisection of lines after cueing to the left end point and to determine whether neglect occurs for the mental representation of a line. METHODS A new representational bisection task was developed to eliminate the influence of the right segment of the physical line that would attract attention. Eight patients w...

Acute versus chronic functional aspects of unilateral spatial neglect.

This article reviews the impact of unilateral spatial neglect on daily living ("functional") activities. Its disturbances on basic functional activities, such as feeding, grooming, and locomotion, are easily identifiable. Patients with neglect frequently lack insight into their disorder and do not initiate compensatory behaviors, which probably impedes recovery. Simple standard tests of neglect...

Swan Unilateral Spatial Neglect