Neuropsychological Research

Neuropsychological Research

The Use of Eye-tracking technology to Evaluate Hemispatial Neglect in Stroke Patients: Hemispatial neglect is defined as a failure to attend to the contralesional side of space in patients who have suffered a stroke. For example, these patients will only dress the non-neglected side of the body, apply make-up to only one side of the face and will often collide with objects on the neglected side of the body. With many neglect patients unaware of their condition, persistent neglect is a poor prognostic indicator for functional independence following stroke. Egocentric neglect causes inattention to stimuli presented on the contralesional side of the body (e.g., inattention to the entire left side of a page), while allocentric neglect results in poor report of elements on the contralesional side of individual objects (e.g., inattention to the left side of individual words on a page). Few studies agree on the assessment, frequency, or prognosis of neglect or its subtypes. Members of the PLAN Lab are currently using eye-tracking technology to determine 1) whether allocentric and egocentric neglect can be accurately dissociated among patients using state of the art measurements of neglect subtype; 2) the relative frequencies of each subtype, and 3) whether there is a relationship between neglect subtype and prognosis, in terms of recovery and functional outcome.