PMID: 8954240Dec 1, 1996Paper

Input and response determinants of visual extinction: a case study

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
N SmaniaC A Marzi

Abstract

We have studied a patient, CZ, with contralateral visual extinction due to a large ischaemic frontal-parietal-temporal lesion in the right hemisphere. We found that manipulation of intensity of the visual stimulus had little effect while an increase in eccentricity substantially increased extinction rate. An important factor was represented by the hemifield of stimulus presentation: when double stimuli were presented to the contralesional (left) hemifield, the leftmost stimulus was consistently extinguished while when stimuli were presented to the ipsilesional (right) hemifield, extinction was absent. Such effect was specific to hemifield rather than to head- and trunk-defined hemispace. Manipulation of response-related variables affected extinction to a large extent: In particular, the use of nonverbal responses diminished extinction considerably. This suggests that an important component of extinction may be represented by an impaired access of visual information to the left hemisphere. Finally, the RT results confirmed previous evidence of an ipsilesional attentional bias favouring the rightmost stimuli both in the contralesional and in the ipsilesional hemifield.

References

Dec 1, 1979·Brain : a Journal of Neurology·J Zihl, D von Cramon
Sep 1, 1975·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·G G Briggs, R D Nebes
Oct 1, 1990·Brain : a Journal of Neurology·E Làdavas
Sep 1, 1990·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·E LàdavasC Umiltà
Dec 1, 1989·Brain : a Journal of Neurology·E BisiachG Geminiani
Aug 1, 1989·Neurology·C A Kooistra, K M Heilman
Jan 1, 1988·Vision Research·L ChelazziL Tomazzoli
Jan 1, 1987·Neuropsychologia·M I PosnerR D Rafal
Sep 1, 1987·Journal of Neurology, Neurosurgery, and Psychiatry·S Z RapcsakK M Heilman
Jan 1, 1985·Perception & Psychophysics·G L ShulmanJ B Sheehy
Jun 1, 1973·Neurology·M L Albert
Jan 1, 1970·Acta Psychologica·M Kinsbourne
Mar 1, 1967·Brain : a Journal of Neurology·H G BirchE Karp
Jul 1, 1982·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·E BisiachG Vallar
Feb 1, 1995·Neuropsychologia·G Di Pellegrino, E De Renzi
Oct 1, 1994·Brain : a Journal of Neurology·M MennemeierK M Heilman
Apr 1, 1994·Current Opinion in Neurobiology·R D Rafal
Apr 1, 1994·Journal of Neurology, Neurosurgery, and Psychiatry·G VallarD Perani
Aug 1, 1993·The Quarterly Journal of Experimental Psychology. A, Human Experimental Psychology·E Bisiach
Mar 1, 1956·Brain : a Journal of Neurology·W S BATTERSBYR L KAHN
Jun 1, 1952·Brain : a Journal of Neurology·J JAFFE, M B BENDER
Mar 1, 1978·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·E De Renzi, P Faglioni
Dec 1, 1946·Brain : a Journal of Neurology·P W NATHAN
Jun 1, 1946·Archives of Neurology and Psychiatry·N REIDER

❮ Previous
Next ❯

Citations

Feb 3, 2000·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·M Neppi-Modona
Nov 19, 1997·Neuropsychologia·G Di PellegrinoF Frassinetti
Feb 3, 2007·Cerebral Cortex·Paolo BartolomeoFabrizio Doricchi
May 14, 2005·Neuroreport·Raffaella RicciAnjan Chatterjee
Apr 12, 2013·Journal of Cognitive Neuroscience·Melanie WilkeRichard A Andersen
Jun 20, 1998·Journal of Cognitive Neuroscience·C MiniussiC A Marzi
Jun 14, 2003·Journal of Cognitive Neuroscience·Chiara GuerriniSalvatore M Aglioti
Aug 10, 1999·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·G CocchiniN Beschin
Sep 27, 2008·Neuropsychologia·Chris RordenGordon C Baylis
Aug 26, 2004·Neuropsychologia·Domenica BuetiSalvatore M Aglioti
Mar 4, 2003·Journal of Neurophysiology·Hansjörg ScherbergerRichard A Andersen

❮ Previous
Next ❯

Related Concepts

Related Feeds

Brain Ischemia

Brain ischemia is a condition in which there is insufficient blood flow to the brain to meet metabolic demand. Discover the latest research on brain ischemia here.