Auditory spatial deficits in the personal and extrapersonal frames of reference due to cortical lesions

Abstract Twenty-nine patients with unilateral cortical lesions were asked to localize simple auditory stimuli (the personal frame of reference) and to bisect the space between two auditory stimuli (the extra-personal frame of reference). Results indicate that the displacement error scores of the right posterior group were consistently greater than those of all other groups (the left posterior, right anterior, left anterior and normal control) in both frames of reference. Error analysis suggests that the right posterior effect reflects spatial dysfunction common to both hemispaces rather than the contralateral deficit characteristic of unilateral neglect.

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