Contralesional directional hypermetria associated with line bisection-specific ipsilesional neglect

Patients with contralesional neglect from right hemisphere injuries often f ail to be aware of or respond to visual stimuli in the left hemispace. In c ontrast, other patients with right hemisphere damage rarely demonstrate beh avior consistent with task-specific ipsilesional neglect (IN). We performed a series of experiments in a patient with IN on a line bisection task afte r a right frontal infarct. When asked to perform horizontal limb movements without visual feedback, the patient showed a leftward directional hypermet ria. Similar performance was also observed during a representational produc tion of a given distance without sensory input. These results suggest that IN is induced by a directional hypermetria resulting from disruption of the motor-intentional system. (C) 2001 Elsevier Science Ltd. All rights reserv ed.