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Trongnetrpunya A, Rapp P, Wang C, Darmon D, Costanzo ME, Nathan DE, Roy MJ, Cellucci CJ, Keyser D. Single-Trial Mechanisms Underlying Changes in Averaged P300 ERP Amplitude and Latency in Military Service Members After Combat Deployment. Front Hum Neurosci 2019; 13:377. [PMID: 31708761 PMCID: PMC6824216 DOI: 10.3389/fnhum.2019.00377] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Accepted: 10/07/2019] [Indexed: 11/13/2022] Open
Abstract
Attenuation in P300 amplitude has been characterized in a wide range of neurological and psychiatric disorders such as dementia, schizophrenia, and posttraumatic stress disorder (PTSD). However, it is unclear whether the attenuation observed in the averaged event-related potential (ERP) is due to the reduction of neural resources available for cognitive processing, the decreased consistency of cognitive resource allocation, or the increased instability of cognitive processing speed. In this study, we investigated this problem by estimating single-trial P300 amplitude and latency using a modified Woody filter and examined the relation between amplitudes and latencies from the single-trial level to the averaged ERP level. ERPs were recorded from 30 military service members returning from combat deployment at two time points separated by 6 or 12 months. A conventional visual oddball task was used to elicit P300. We observed that the extent of changes in the within-subject average P300 amplitude over time was significantly correlated with the amount of change in three single-trial measures: (1) the latency variance of the single-trial P300 (r = -0.440, p = 0.0102); (2) the percentage of P300-absent trials (r = -0.488, p = 0.005); and (3) the consistent variation of the single-trial amplitude (r = 0.571, p = 0.0022). These findings suggest that there are multiple underlying mechanisms on the single-trial level that contribute to the changes in amplitudes seen at the averaged ERP level. The changes between the first and second assessments were quantified with the intraclass correlation coefficient, the standard error of measurement and the minimal detectable difference. The unique population, the small sample size and the large fraction of participants lost to follow up precludes generalizations of these measures of change to other populations.
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Affiliation(s)
- Amy Trongnetrpunya
- Henry M. Jackson Foundation, Department of Military and Emergency Medicine, Uniformed Services University, Bethesda, MD, United States
| | - Paul Rapp
- Department of Military and Emergency Medicine, Uniformed Services University, Bethesda, MD, United States,*Correspondence: Paul Rapp
| | - Chao Wang
- Henry M. Jackson Foundation, Department of Military and Emergency Medicine, Uniformed Services University, Bethesda, MD, United States
| | - David Darmon
- Department of Mathematics, Monmouth University, West Long Branch, NJ, United States
| | - Michelle E. Costanzo
- Department of Medicine, Uniformed Services University, Bethesda, MD, United States
| | - Dominic E. Nathan
- Henry M. Jackson Foundation, Center for Neuroscience and Regenerative Medicine, Uniformed Services University, Bethesda, MD, United States,Graduate School of Nursing, Uniformed Services University, Bethesda, MD, United States
| | - Michael J. Roy
- Department of Medicine, Uniformed Services University, Bethesda, MD, United States
| | | | - David Keyser
- Department of Military and Emergency Medicine, Uniformed Services University, Bethesda, MD, United States
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Abstract
The empirical and theoretical development of the P300 event-related brain potential (ERP) is reviewed by considering factors that contribute to its amplitude, latency, and general characteristics. The neuropsychological origins of the P3a and P3b subcomponents are detailed, and how target/standard discrimination difficulty modulates scalp topography is discussed. The neural loci of P3a and P3b generation are outlined, and a cognitive model is proffered: P3a originates from stimulus-driven frontal attention mechanisms during task processing, whereas P3b originates from temporal-parietal activity associated with attention and appears related to subsequent memory processing. Neurotransmitter actions associating P3a to frontal/dopaminergic and P3b to parietal/norepinephrine pathways are highlighted. Neuroinhibition is suggested as an overarching theoretical mechanism for P300, which is elicited when stimulus detection engages memory operations.
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Affiliation(s)
- John Polich
- Cognitive Electrophysiology Laboratory, Molecular and Integrative Neurosciences Department, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
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Polich J. Updating P300: an integrative theory of P3a and P3b. Clin Neurophysiol 2007; 118:2128-48. [PMID: 17573239 PMCID: PMC2715154 DOI: 10.1016/j.clinph.2007.04.019] [Citation(s) in RCA: 4911] [Impact Index Per Article: 288.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2006] [Revised: 04/19/2007] [Accepted: 04/28/2007] [Indexed: 11/18/2022]
Abstract
The empirical and theoretical development of the P300 event-related brain potential (ERP) is reviewed by considering factors that contribute to its amplitude, latency, and general characteristics. The neuropsychological origins of the P3a and P3b subcomponents are detailed, and how target/standard discrimination difficulty modulates scalp topography is discussed. The neural loci of P3a and P3b generation are outlined, and a cognitive model is proffered: P3a originates from stimulus-driven frontal attention mechanisms during task processing, whereas P3b originates from temporal-parietal activity associated with attention and appears related to subsequent memory processing. Neurotransmitter actions associating P3a to frontal/dopaminergic and P3b to parietal/norepinephrine pathways are highlighted. Neuroinhibition is suggested as an overarching theoretical mechanism for P300, which is elicited when stimulus detection engages memory operations.
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Affiliation(s)
- John Polich
- Cognitive Electrophysiology Laboratory, Molecular and Integrative Neurosciences Department, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
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Polich J. Updating P300: an integrative theory of P3a and P3b. CLINICAL NEUROPHYSIOLOGY : OFFICIAL JOURNAL OF THE INTERNATIONAL FEDERATION OF CLINICAL NEUROPHYSIOLOGY 2007. [PMID: 17573239 DOI: 10.1016/j.clinph.2007.04.019.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The empirical and theoretical development of the P300 event-related brain potential (ERP) is reviewed by considering factors that contribute to its amplitude, latency, and general characteristics. The neuropsychological origins of the P3a and P3b subcomponents are detailed, and how target/standard discrimination difficulty modulates scalp topography is discussed. The neural loci of P3a and P3b generation are outlined, and a cognitive model is proffered: P3a originates from stimulus-driven frontal attention mechanisms during task processing, whereas P3b originates from temporal-parietal activity associated with attention and appears related to subsequent memory processing. Neurotransmitter actions associating P3a to frontal/dopaminergic and P3b to parietal/norepinephrine pathways are highlighted. Neuroinhibition is suggested as an overarching theoretical mechanism for P300, which is elicited when stimulus detection engages memory operations.
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Affiliation(s)
- John Polich
- Cognitive Electrophysiology Laboratory, Molecular and Integrative Neurosciences Department, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
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