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Antisaccade task
Saccadic eye movement is primarily controlled by the frontal cortex. The anti-saccade (AS) task is a gross estimation of injury or dysfunction of the frontal lobe, by assessing the brain’s ability to inhibit the reflexive saccade.〔The antisaccade task and neuropsychological tests of prefrontal cortical integrity in schizophrenia: empirical findings and interpretative considerations. D. Levy, N. Mendell, P. Holzman. World Psychiatry. 2004 February; 3(1): 32–40〕
==Procedure==
To perform the anti-saccade task, a patient is asked to fixate on an motionless target (such as a small dot). A stimulus is then presented to one side of the target. The patient is asked to make a saccade toward the opposite direction of the stimulus. For example, if a stimulus is presented to the left of the motionless target, the patient should look toward the right. Failure to inhibit a reflexive saccade is considered an error.〔
Neurologic disorders affecting both the frontal cortex or the basal ganglia have shown impaired performance on the anti-saccade task. These include Schizophrenia, Huntington's disease, Parkinson's disease, and progressive supranuclear palsy. Additionally, disseminated brain disease such as Alzheimer's disease or AIDS dementia also have an increased number of errors.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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