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Line bisection and unilateral visual neglect in patients with neurologic impairment

Veterans Administration Medical Center and the Department of Neurology, University of Utah College of Medicine (Drs. Schenkenberg and Ajax), and the University of Utah (Dr. Bradford), Salt Lake City, UT.

Unilateral visual neglect is a common symptom or sign in patients with lesions of the nondominant hemisphere. Several techniques have been used to demonstrate visual neglect. One such technique—asking a patient to bisect a horizontal line and expecting an estimate of center away from the side neglected—has been used for over 70 years but has not been statistically evaluated. We conducted a formal evaulation of this method and found that under special conditions, line-bisection performance can discriminate between patients with right-hemisphere lesions and patients with diffuse lesions, patients with left-hemisphere lesions, and hospital controls. When used to investigate visual neglect in an individual patient, the line-bisection test should be given in conjunction with other complementary procedures such as symmetric drawings and the Memory-for-Designs Test.

Address correspondence and reprint requests to Dr. Schenkenberg, Neurology Service, Veterans Administration Medical Center, Salt Lake City, UT 84148.

Accepted for publication August 14, 1979.

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