@article{ref1,
title="Mapping brain activity during loss of situation awareness: an EEG investigation of a basis for top-down influence on perception",
journal="Human factors",
year="2014",
author="Catherwood, Di and Edgar, Graham K. and Nikolla, Dritan and Alford, Chris and Brookes, David and Baker, Steven and White, Sarah",
volume="56",
number="8",
pages="1428-1452",
abstract="OBJECTIVE: The objective was to map brain activity during early intervals in loss of situation awareness (SA) to examine any co-activity in visual and high-order regions, reflecting grounds for top-down influences on Level I SA. <br><br>BACKGROUND: Behavioral and neuroscience evidence indicates that high-order brain areas can engage before perception is complete. Inappropriate top-down messages may distort perception during loss of SA. Evidence of co-activity of perceptual and high-order regions would not confirm such influence but may reflect a basis for it. <br><br>METHOD: SA and bias were measured using Quantitative Analysis of Situation Awareness and brain activity recorded with 128-channel EEG (electroencephalography) during loss of SA. One task (15 participants) required identification of a target pattern, and another task (10 participants) identification of &quot;threat&quot; in urban scenes. In both, the target was changed without warning, enforcing loss of SA. Key regions of brain activity were identified using source localization with standardized low-resolution electrical tomography (sLORETA) 150 to 160 ms post-stimulus onset in both tasks and also 100 to 110 ms in the second task. <br><br>RESULTS: In both tasks, there was significant loss of SA and bias shift (p <.02), associated at both 150- and 100-ms intervals with co-activity of visual regions and prefrontal, anterior cingulate and parietal regions linked to cognition under uncertainty. <br><br>CONCLUSION: There was early co-activity in high- order and visual perception regions that may provide a basis for top-down influence on perception. APPLICATION: Co-activity in high- and low-order brain regions may explain either beneficial or disruptive top-down influence on perception affecting Level I SA in real-world operations.<p /> <p>Language: en</p>",
language="en",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}