ORCID Profile
0000-0003-2256-0597
Current Organisation
University of Southampton
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Publisher: SAGE Publications
Date: 28-02-2013
Abstract: Anger is associated with various responses. Research on the neuroscience of anger has revealed that greater left than right frontal cortical activity is associated with angry approach-oriented responses, such as aggression, whereas greater right than left frontal cortical activity is associated with inhibited angry responses mixed with anxiety. In the current research, we extended these past studies by manipulating asymmetric frontal cortical activity using transcranial direct current stimulation and assessing its influence on ruminative responses to an interpersonal insult. Results revealed that self-reported rumination was greatest for participants who received a manipulated increase in relative right frontal cortical activity compared with those who received either a manipulated increase in relative left frontal cortical activity or sham stimulation. Taken together with past findings, the current results suggest that anger associated with greater relative left frontal cortical activity predicts approach-oriented aggressive action, whereas anger associated with greater relative right frontal cortical activity predicts inhibited rumination.
Publisher: Elsevier BV
Date: 09-2017
DOI: 10.1016/J.IJPSYCHO.2017.03.001
Abstract: The balance between activity in the left and right frontal cortex, commonly referred to as asymmetric frontal cortical activity, has served as a proxy for an organism's motivational direction (i.e., approach vs. avoidance). Many studies have examined the influence of the manipulation of motivational direction on asymmetrical frontal cortical activity and found results consistent with the idea that greater relative left (right) frontal cortical activity is associated with approach (avoidance) motivation. We critically review literature employing physical (versus psychological) manipulations of frontal asymmetry using a variety of methodologies including neurofeedback training, muscular contractions, and non-invasive brain stimulation. These reviewed methods allow us to make stronger causal inferences regarding the role of asymmetric frontal cortical activity in approach and avoidance motivation.
Publisher: Wiley
Date: 07-04-2011
Publisher: Frontiers Media SA
Date: 08-01-2019
Publisher: Wiley
Date: 14-08-2023
DOI: 10.1111/JOPY.12876
Abstract: What are the motivational underpinnings of solitude? We know from self‐report studies that increases in solitude are associated with drops in approach motivation and rises in avoidance motivation, but only when solitude is experienced as non‐self‐determined (i.e., non‐autonomous). However, the extent to which in idual differences in solitude relate to neurophysiological markers of approach–avoidance motivation derived from resting‐state electroencephalogram (EEG) is unknown. These markers are Frontal Alpha Asymmetry, beta suppression, and midline Posterior versus Frontal EEG Theta Activity. We assessed the relation among in idual differences in the reasons for solitude (i.e., preference for solitude, motivation for solitude), approach–avoidance motivation, and resting‐state EEG markers of approach–avoidance motivation ( N = 115). General preference for solitude was negatively related to approach motivation, observed in both self‐reported measures and EEG markers of approach motivation. Self‐determined solitude was positively related to both self‐reported approach motivation and avoidance motivation in the social domain (i.e., friendship). Non‐self‐determined solitude was negatively associated with self‐reported avoidance motivation. This research was a preliminary attempt to address the neurophysiological underpinnings of solitude in the context of motivation.
Publisher: Cold Spring Harbor Laboratory
Date: 22-09-2023
Publisher: Springer Netherlands
Date: 2013
Publisher: Cold Spring Harbor Laboratory
Date: 10-05-2023
DOI: 10.1101/2023.05.08.539920
Abstract: Parkinson’s Disease (PD) has been associated with greater total power in canonical frequency bands (i.e., alpha, beta) of the resting electroencephalogram (EEG). However, PD has also been associated with a reduction in the proportion of total power across all frequency bands. This discrepancy may be explained by aperiodic activity (exponent and offset) present across all frequency bands. Here, we examined differences in the eyes-open and eyes-closed resting EEG of PD participants ( N = 26) on and off medication, and age-matched controls (CTL N = 26). We extracted power from canonical frequency bands using traditional methods (total alpha and beta power) and extracted separate parameters for periodic (parameterized alpha and beta power) and aperiodic activity (exponent and offset). Cluster-based permutation tests over spatial and frequency dimensions indicated that total alpha and beta power, and aperiodic exponent and offset were greater in PD participants, independent of medication status. After removing the exponent and offset, greater alpha power in PD (vs. CTL) was only present in eyes-open recordings and no reliable differences in beta power were observed. Differences between PD and CTLs in the resting EEG are likely driven by aperiodic activity, suggestive of greater relative inhibitory neural activity and greater neuronal spiking. Our findings suggest that resting EEG activity in PD is characterized by medication-invariant differences in aperiodic activity which is independent of the increase in alpha power with EO. This highlights the importance of considering aperiodic activity contributions to the neural correlates of brain disorders.
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Nicholas Kelley.