What does the prefrontal cortex “do” in affect: Perspectives on frontal EEG asymmetry research. Biological Psychology, 67, 219-233

Laboratory for Affective Neuroscience, W.M. Keck Laboratory for Functional Neuroimaging and Behavior, University of Wisconsin-Madison, 1202 West Johnson Street, Madison, WI 53706, USA.
Biological Psychology (Impact Factor: 3.4). 11/2004; 67(1-2):219-33. DOI: 10.1016/j.biopsycho.2004.03.008
Source: PubMed


This commentary provides reflections on the current state of affairs in research on EEG frontal asymmetries associated with affect. Although considerable progress has occurred since the first report on this topic 25 years ago, research on frontal EEG asymmetries associated with affect has largely evolved in the absence of any serious connection with neuroscience research on the structure and function of the primate prefrontal cortex (PFC). Such integration is important as this work progresses since the neuroscience literature can help to understand what the prefrontal cortex is "doing" in affective processing. Data from the neuroscience literature on the heterogeneity of different sectors of the PFC are introduced and more specific hypotheses are offered about what different sectors of the PFC might be doing in affect. A number of methodological issues associated with EEG measures of functional prefrontal asymmetries are also considered.

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    • "Accordingly, EEG has proven invaluable for detecting and delineating psycho-physiological alterations in cognitive/motor functions following concussion (for reviews see: Broglio et al. 2011; Gosselin et al. 2012; Slobounov et al. 2012). Although no prior sportsconcussion study interpreted EEG activity within a psycho-affective framework, researchers have used EEG methods for decades to understand psycho-affective processes in normal and clinical populations (Davidson 2004; Harmon-Jones et al. 2010). A large literature indicates that frontal EEG-power, and frontal asymmetries in particular, are related to psychoaffective traits and states (Davidson 2004; Harmon-Jones et al. 2010). "
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    ABSTRACT: Abstract Background: Understanding the neuropathological underpinnings of sport-related concussion are critical for diagnosis, prognosis, and remediation. Although electro-encephalographic (EEG) methods have proven invaluable for understanding psycho-affective pathologies in various clinical conditions, they have not been used to understand the psycho-affective outcomes of concussive injuries. Hypothesis/Purpose: Accordingly, we evaluated the relation of electroencephalographic (EEG) power in collegiate athletes to psycho-affective measures. We predicted that athletes with a history of concussion would exhibit alterations in frontal EEG asymmetries indicative of increased depression, anxiety and more general mood disturbance. Methods: During this cross-sectional study, resting EEG and measures of mood and affect, including the Beck Depression Inventory-II (BDI-II) and Profile of Mood States (POMS) were collected in 81 young-adult male athletes (52 concussion history; 29 controls). All athletes with a history of concussion (9+ months from injury) reported to be symptom free, and all participants were actively taking part in their sport at the time of testing. Results: Compared to control athletes, the athletes with a history of concussion exhibited alterations in frontal-alpha and frontal-beta asymmetry (p’s< .05). Correlational analyses revealed that alterations in frontal-alpha asymmetry were related to self-reported depression and anxiety, and alterations in beta-asymmetry were related to self-reported anger/aggression, but these relations were only significant for athletes with a history of concussion. Conclusions: The current study suggests that athletes with a history of concussion who made a complete return to play and reported to be asymptomatic on a commonly used symptom checklist may still exhibit neural activity associated with increased levels of depression, anxiety and anger/hostility. Clinical Relevance: The current results reinforce the clinical necessity for long-term evaluations of athletes irrespective of apparent symptom resolution, and suggest that EEG may serve as a sensitive tool to identify and track concussion-related alterations in psycho-affective health before they manifest as clinical disorders.
    Brain Imaging and Behavior 11/2015; DOI:10.1007/s11682-015-9473-6 · 4.60 Impact Factor
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    • "EEG is noninvasive and provides better time resolution than other CNS signals. However, most existing research on emotional EEG has focused on single-electrode EEG characteristic responses rather than an array of EEG electrodes in HC participant [21] [22] [23]. For example, Baumgartner et al. showed that EEG activity over the left hemisphere increases in happy conditions compared to negative emotional conditions [22]. "
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    ABSTRACT: Successful emotional communication is crucial for social interactions and social relationships. Parkinson's Disease (PD) patients have shown deficits in emotional recognition abilities although the research findings are inconclusive. This paper presents an investigation of six emotions (happiness, sadness, fear, anger, surprise, and disgust) of twenty non-demented (Mini-Mental State Examination score >24) PD patients and twenty Healthy Controls (HCs) using Electroencephalogram (EEG)-based Brain Functional Connectivity (BFC) patterns. The functional connectivity index feature in EEG signals is computed using three different methods: Correlation (COR), Coherence (COH), and Phase Synchronization Index (PSI). Further, a new functional connectivity index feature is proposed using bispectral analysis. The experimental results indicate that the BFC change is significantly different among emotional states of PD patients compared with HC. Also, the emotional connectivity pattern classified using Support Vector Machine (SVM) classifier yielded the highest accuracy for the new bispectral functional connectivity index. The PD patients showed emotional impairments as demonstrated by a poor classification performance. This finding suggests that decrease in the functional connectivity indices during emotional stimulation in PD, indicating functional disconnections between cortical areas.
    Behavioural Brain Research 10/2015; DOI:10.1016/j.bbr.2015.10.036 · 3.03 Impact Factor
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    • "2.2 Frontal EEG Asymmetry Davidson [3] [4] [5] "

    Proc. of Academic MindTrek 2015, September 22-24, 2015 Tampere. ACM; 09/2015
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