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Cortical mechanisms of attention in time: neural correlates of the Lag-1-sparing phenomenon.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Kessler, Klaus Schmitz, Frank Gross, Joachim Hommel, Bernhard Shapiro, Kimron Schnitzler, Alfons |
| Copyright Year | 2005 |
| Abstract | If humans monitor streams of rapidly presented (approximately 100-ms intervals) visual stimuli, which are typically specific single letters of the alphabet, for two targets (T1 and T2), they often miss T2 if it follows T1 within an interval of 200-500 ms. If T2 follows T1 directly (within 100 ms; described as occurring at 'Lag 1'), however, performance is often excellent: the so-called 'Lag-1 sparing' phenomenon. Lag-1 sparing might result from the integration of the two targets into the same 'event representation', which fits with the observation that sparing is often accompanied by a loss of T1-T2 order information. Alternatively, this might point to competition between the two targets (implying a trade-off between performance on T1 and T2) and Lag-1 sparing might solely emerge from conditional data analysis (i.e. T2 performance given T1 correct). We investigated the neural correlates of Lag-1 sparing by carrying out magnetoencephalography (MEG) recordings during an attentional blink (AB) task, by presenting two targets with a temporal lag of either 1 or 2 and, in the case of Lag 2, with a nontarget or a blank intervening between T1 and T2. In contrast to Lag 2, where two distinct neural responses were observed, at Lag 1 the two targets produced one common neural response in the left temporo-parieto-frontal (TPF) area but not in the right TPF or prefrontal areas. We discuss the implications of this result with respect to competition and integration hypotheses, and with respect to the different functional roles of the cortical areas considered. We suggest that more than one target can be identified in parallel in left TPF, at least in the absence of intervening nontarget information (i.e. masks), yet identified targets are processed and consolidated as two separate events by other cortical areas (right TPF and PFC, respectively). |
| Starting Page | 5 |
| Ending Page | 5 |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://home.planet.nl/~homme247/Kessler_etal_EJN_2005.pdf |
| Alternate Webpage(s) | http://www.bernhard-hommel.eu/Kessler_etal_EJN_2005.pdf |
| Alternate Webpage(s) | http://bernhard-hommel.eu/Kessler_etal_EJN_2005.pdf |
| PubMed reference number | 15932614v1 |
| Volume Number | 21 |
| Issue Number | 9 |
| Journal | The European journal of neuroscience |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Alphabet Attentional Blink CCL4 protein, human CCL4 wt Allele Magnetoencephalography Masks STMN1 gene STMN1 wt Allele Seizures Taxotere-Platinol-Fluorouracil Regimen frontal lobe |
| Content Type | Text |
| Resource Type | Article |
