Electrical neuroimaging evidence that spatial frequency-based selective attention affects V1 activity as early as 40-60 ms in humans. (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• Electrical neuroimaging evidence that spatial frequency-based selective attention affects V1 activity as early as 40-60 ms in humans. (Articolo in rivista) (literal)

Anno

• 2010-01-01T00:00:00+01:00 (literal)

Alternative label

• Proverbio A.M. 1, Del Zotto M. 2, Zani A. 3 (2010)
  Electrical neuroimaging evidence that spatial frequency-based selective attention affects V1 activity as early as 40-60 ms in humans.
  in BMC neuroscience (Online)
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Proverbio A.M. 1, Del Zotto M. 2, Zani A. 3 (literal)

Pagina inizio

• 59 (literal)

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• 11 (literal)

Rivista

• BMC neuroscience (Rivista)

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• Corresponding author: A.M. Proverbio (mado.proverbio@unimib.it) IF 2010: 3.091 (literal)

Note

• Google Scholar (literal)
• PubMed (literal)
• Scopu (literal)
• ISI Web of Science (WOS) (literal)

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• 1. Dept. of Psychology, University of Milano-Bicocca, Milano. 2. Laboratory of Experimental Neuropsychology, Neuropsychology Unit, Geneva University Hospital (Switzerland). 3. Inst. of Bioimaging and Molecular Ph)ysiology, CNR, Segrate (MI) mado.proverbio@unimib.it, marzia.delzotto@hcuge.ch, alberto.zani@ibfm.cnr.it (literal)

Titolo

• Electrical neuroimaging evidence that spatial frequency-based selective attention affects V1 activity as early as 40-60 ms in humans. (literal)

Abstract

• BACKGROUND: Karns and Knight (2009) [1] demonstrated by using ERP and gamma band oscillatory responses that intermodal attention modulates visual processing at the latency of the early phase of the C1 response (62-72 ms) thought to be generated in the primary visual cortex. However, the timing of attentional modulation of visual cortex during object-based attention remains a controversial issue. RESULTS: In this study, EEG recording and LORETA source reconstruction were performed. A large number of subjects (29) and of trial repetitions were used (13,312). EEG was recorded from 128 scalp sites at a sampling rate of 512 Hz. Four square-wave gratings (0.75, 1.5, 3, 6 c/deg) were randomly presented in the 4 quadrants of the visual field. Participants were instructed to pay conjoined attention to a given stimulus quadrant and spatial frequency. The C1 and P1 sensory-evoked components of ERPs were quantified by measuring their mean amplitudes across time within 5 latency ranges 40-60, 60-80, 80-100, 100-120 and 120-140 ms. CONCLUSIONS: Early attention effects were found in the form of an enhanced C1 response (40-80 ms) to frequency-relevant gratings. LORETA, within its spatial resolution limits, identified the neural generators of this effect in the striate cortex (BA17), among other areas. (literal)

Prodotto di

• Institute of molecular bioimaging and physiology (IBFM) (Istituto)
• Neurofisiologia delle funzioni cerebrali cognitive umane (ME.P02.003.003) (Modulo)

Autore CNR

• ALBERTO ZANI (Persona)

Insieme di parole chiave

• Keywords of "Electrical neuroimaging evidence that spatial frequency-based selective attention affects V1 activity as early as 40-60 ms in humans." (Insieme di parole chiave)

Incoming links:

Autore CNR di

• ALBERTO ZANI (Persona)

Prodotto

• Institute of molecular bioimaging and physiology (IBFM) (Istituto)
• Neurofisiologia delle funzioni cerebrali cognitive umane (ME.P02.003.003) (Modulo)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• BMC neuroscience (Rivista)

Insieme di parole chiave di

• Keywords of "Electrical neuroimaging evidence that spatial frequency-based selective attention affects V1 activity as early as 40-60 ms in humans." (Insieme di parole chiave)