Contrast sensitivity for sinusoidal gratings of different spatial frequencies and low spatial frequency discrimination of high contrast squarewave gratings were measured in 26 right brain damaged patients, 15 of whom showed symptoms of spatial hemi-neglect. No difference was present between neglect and non-neglect patients in either task. A difference in contrast sensitivity restricted to low spatial frequencies was present between controls and patients, independent of neglect. Overall, results indicated that spatial vision at threshold and suprathreshold levels is not selectively impaired in patients with hemi-neglect, a finding consistent with theories which postulate a post-perceptual locus of impairment in this syndrome.
Contrast sensitivity and low spatial frequency discrimination in hemi-neglect patients / Spinelli, D; Guariglia, Cecilia; Massironi, M; Pizzamiglio, L; Zoccolotti, Pierluigi. - In: NEUROPSYCHOLOGIA. - ISSN 0028-3932. - 28:(1990), pp. 727-732. [10.1016/0028-3932(90)90127-A]
Contrast sensitivity and low spatial frequency discrimination in hemi-neglect patients.
GUARIGLIA, Cecilia;ZOCCOLOTTI, Pierluigi
1990
Abstract
Contrast sensitivity for sinusoidal gratings of different spatial frequencies and low spatial frequency discrimination of high contrast squarewave gratings were measured in 26 right brain damaged patients, 15 of whom showed symptoms of spatial hemi-neglect. No difference was present between neglect and non-neglect patients in either task. A difference in contrast sensitivity restricted to low spatial frequencies was present between controls and patients, independent of neglect. Overall, results indicated that spatial vision at threshold and suprathreshold levels is not selectively impaired in patients with hemi-neglect, a finding consistent with theories which postulate a post-perceptual locus of impairment in this syndrome.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
