HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Marzi, C. A. Articles by Maravita, A. Search for Related Content PubMed PubMed Citation Articles by Marzi, C. A. Articles by Maravita, A.

Electrophysiological Correlates of Conscious Vision: Evidence from Unilateral Extinction

University of Verona, Italy
Oxford University
Rehabilitation Unit Borgo Roma, Italy
University College London

Corresponding author. Tel.: +39-45-8098143; fax: +39-45-580881; e-mail: marzic{at}borgoroma.univr.it

To study the electrophysiological correlates of conscious vision, we recorded event-related potentials (ERPs) in a patient with partial unilateral visual extinction as a result of right-hemisphere damage. When, following bilateral presentations, contralesional stimuli were not perceived, there was an absence of the early attention-sensitive P1 (80–120 msec) and N1 (140–180 msec) components of the ERP response. In contrast, following unilateral presentations, or in those bilateral presentations in which contralesional stimuli were perceived (about 60%), these ERP components were present. These results provide novel evidence that extinction involves the stage of early focusing of attention and that the P1 and N1 components of visual ERPs are reliable physiological correlates of conscious vision.

This article has been cited by other articles:

				F. Di Russo, T. Aprile, G. Spitoni, and D. Spinelli Impaired visual processing of contralesional stimuli in neglect patients: a visual-evoked potential study Brain, March 1, 2008; 131(3): 842 - 854. [Abstract] [Full Text] [PDF]

				C. Babiloni, F. Vecchio, A. Bultrini, G. Luca Romani, and P. M. Rossini Pre- and Poststimulus Alpha Rhythms Are Related to Conscious Visual Perception: A High-Resolution EEG Study Cereb Cortex, December 1, 2006; 16(12): 1690 - 1700. [Abstract] [Full Text] [PDF]

				M. Koivisto, A. Revonsuo, and M. Lehtonen Independence of Visual Awareness from the Scope of Attention: an Electrophysiological Study Cereb Cortex, March 1, 2006; 16(3): 415 - 424. [Abstract] [Full Text] [PDF]

				C. Babiloni, F. Vecchio, M. Miriello, G. L. Romani, and P. M. Rossini Visuo-spatial Consciousness and Parieto-occipital Areas: A High-resolution EEG Study Cereb Cortex, January 1, 2006; 16(1): 37 - 46. [Abstract] [Full Text] [PDF]

				R. Verleger Comment on "Electrophysiological Correlates of Conscious Vision: Evidence from Unilateral Extinction" by Marzi, Girelli, Miniussi, Smania, and Maravita, in JOCN 12:5 J. Cogn. Neurosci., April 1, 2001; 13(3): 416 - 417. [Full Text]

				P. Vuilleumier, N. Sagiv, E. Hazeltine, R. A. Poldrack, D. Swick, R. D. Rafal, and J. D. E. Gabrieli Neural fate of seen and unseen faces in visuospatial neglect: A combined event-related functional MRI and event-related potential study PNAS, March 1, 2001; (2001) 51436898. [Abstract] [Full Text]

				P. Vuilleumier, N. Sagiv, E. Hazeltine, R. A. Poldrack, D. Swick, R. D. Rafal, and J. D. E. Gabrieli Neural fate of seen and unseen faces in visuospatial neglect: A combined event-related functional MRI and event-related potential study PNAS, March 13, 2001; 98(6): 3495 - 3500. [Abstract] [Full Text] [PDF]