Soldiers and Marksmen Under Fire: Monitoring Performance with Neural Correlates of Small Arms Fire Localization
Important decisions in the heat of battle occur rapidly and a key aptitude of a good combat soldier is the ability to determine whether he is under fire. This rapid decision requires the soldier to make a judgment in a fraction of a second, based on a barrage of multisensory cues coming from the au...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2013-03-01
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| Series: | Frontiers in Human Neuroscience |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fnhum.2013.00067/full |
| _version_ | 1819066537061908480 |
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| author | Jason eSherwin Jason eSherwin Jeremy eGaston |
| author_facet | Jason eSherwin Jason eSherwin Jeremy eGaston |
| author_sort | Jason eSherwin |
| collection | DOAJ |
| description | Important decisions in the heat of battle occur rapidly and a key aptitude of a good combat soldier is the ability to determine whether he is under fire. This rapid decision requires the soldier to make a judgment in a fraction of a second, based on a barrage of multisensory cues coming from the auditory, tactile and visual domains. The present study uses an auditory oddball paradigm to examine listener ability to differentiate shooter locations from audio recordings of small arms fire. More importantly, we address the neural correlates involved in this rapid decision process by employing single-trial analysis of electroencephalography (EEG). In particular, we examine small arms expert listeners as they differentiate the sounds of small arms firing events recorded at different observer positions relative to a shooter. Using signal detection theory, we find clear neural signatures related to shooter firing angle by identifying the times of neural discrimination on a trial-to-trial basis. Similar to previous results in oddball experiments, we find common windows relative to the response and the stimulus when neural activity discriminates between target stimuli (forward fire: observer 0° to firing angle) vs. standards (off-axis fire: observer 90° to firing angle). We also find, using windows of maximum discrimination, that auditory target vs. standard discrimination yields neural sources in Brodmann Area 19 (BA 19), i.e., in the visual cortex. In summary, we show that single-trial analysis of EEG yields informative scalp distributions and source current localization of discriminating activity when the small arms experts discriminate between forward and off-axis fire observer positions. Furthermore, this perceptual decision implicates brain regions involved in visual processing, even though the task is purely auditory. Finally, we utilize these techniques to quantify the level of expertise in these subjects for the chosen task, having implications for human performan |
| first_indexed | 2024-12-21T16:03:56Z |
| format | Article |
| id | doaj.art-992f627bcbba439d8b835d776ac68c88 |
| institution | Directory Open Access Journal |
| issn | 1662-5161 |
| language | English |
| last_indexed | 2024-12-21T16:03:56Z |
| publishDate | 2013-03-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Human Neuroscience |
| spelling | doaj.art-992f627bcbba439d8b835d776ac68c882022-12-21T18:57:56ZengFrontiers Media S.A.Frontiers in Human Neuroscience1662-51612013-03-01710.3389/fnhum.2013.0006740771Soldiers and Marksmen Under Fire: Monitoring Performance with Neural Correlates of Small Arms Fire LocalizationJason eSherwin0Jason eSherwin1Jeremy eGaston2Columbia UniversityU.S. Army Research Laboratory and Oak Ridge Associated UniversitiesU.S. Army Research Laboratory and Oak Ridge Associated UniversitiesImportant decisions in the heat of battle occur rapidly and a key aptitude of a good combat soldier is the ability to determine whether he is under fire. This rapid decision requires the soldier to make a judgment in a fraction of a second, based on a barrage of multisensory cues coming from the auditory, tactile and visual domains. The present study uses an auditory oddball paradigm to examine listener ability to differentiate shooter locations from audio recordings of small arms fire. More importantly, we address the neural correlates involved in this rapid decision process by employing single-trial analysis of electroencephalography (EEG). In particular, we examine small arms expert listeners as they differentiate the sounds of small arms firing events recorded at different observer positions relative to a shooter. Using signal detection theory, we find clear neural signatures related to shooter firing angle by identifying the times of neural discrimination on a trial-to-trial basis. Similar to previous results in oddball experiments, we find common windows relative to the response and the stimulus when neural activity discriminates between target stimuli (forward fire: observer 0° to firing angle) vs. standards (off-axis fire: observer 90° to firing angle). We also find, using windows of maximum discrimination, that auditory target vs. standard discrimination yields neural sources in Brodmann Area 19 (BA 19), i.e., in the visual cortex. In summary, we show that single-trial analysis of EEG yields informative scalp distributions and source current localization of discriminating activity when the small arms experts discriminate between forward and off-axis fire observer positions. Furthermore, this perceptual decision implicates brain regions involved in visual processing, even though the task is purely auditory. Finally, we utilize these techniques to quantify the level of expertise in these subjects for the chosen task, having implications for human performanhttp://journal.frontiersin.org/Journal/10.3389/fnhum.2013.00067/fullAuditory PerceptionMilitary MedicineMilitary PersonnelEEGsource localizationExpertise |
| spellingShingle | Jason eSherwin Jason eSherwin Jeremy eGaston Soldiers and Marksmen Under Fire: Monitoring Performance with Neural Correlates of Small Arms Fire Localization Frontiers in Human Neuroscience Auditory Perception Military Medicine Military Personnel EEG source localization Expertise |
| title | Soldiers and Marksmen Under Fire: Monitoring Performance with Neural Correlates of Small Arms Fire Localization |
| title_full | Soldiers and Marksmen Under Fire: Monitoring Performance with Neural Correlates of Small Arms Fire Localization |
| title_fullStr | Soldiers and Marksmen Under Fire: Monitoring Performance with Neural Correlates of Small Arms Fire Localization |
| title_full_unstemmed | Soldiers and Marksmen Under Fire: Monitoring Performance with Neural Correlates of Small Arms Fire Localization |
| title_short | Soldiers and Marksmen Under Fire: Monitoring Performance with Neural Correlates of Small Arms Fire Localization |
| title_sort | soldiers and marksmen under fire monitoring performance with neural correlates of small arms fire localization |
| topic | Auditory Perception Military Medicine Military Personnel EEG source localization Expertise |
| url | http://journal.frontiersin.org/Journal/10.3389/fnhum.2013.00067/full |
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