Dysfunction in Visual Object Recognition of Patients with Unilateral Brain Damage under the Element Presentation Condition

Abstract

The ability of integrating visual elements of 12 patients with right hemisphere damage (RHD), 14 patients with left hemisphere damage (LHD), and 20 normal young adults was investigated to specify the visual dysfunction processes of patients with unilateral brain damage. Both RHD and LHD groups demonstrated clear deficit in recognizing the familiar objects of which elements were cyclically presented at various time intervals. Moreover, in the nonsequentail element presentation condition the spatial and temporal integration of the RHD group was impaired relative to the LHD and normal groups. The visual degradations of patients with brain damage were discussed from the point of view of information processing stage as well as serial and parallel processing.