scholarly journals Theta band power increases in the posterior hippocampus predict successful episodic memory encoding in humans

Hippocampus ◽  
2017 ◽  
Vol 27 (10) ◽  
pp. 1040-1053 ◽  
Author(s):  
Jui-Jui Lin ◽  
Michael D. Rugg ◽  
Sandhitsu Das ◽  
Joel Stein ◽  
Daniel S. Rizzuto ◽  
...  
Keyword(s):  
Episodic Memory ◽  
Memory Encoding ◽  
Theta Band ◽  
Band Power ◽  
Theta Band Power

scholarly journals Event-related and oscillatory signatures of response inhibition: A magnetoencephalography study with subclinical high and low impulsivity adults

2021 ◽  
Author(s):  
Ainara Jauregi ◽  
Hongfang Wang ◽  
Stefanie Hassel ◽  
Klaus Kessler
Keyword(s):  
Response Inhibition ◽  
Temporal Dynamics ◽  
Error Rates ◽  
Stop Signal ◽  
Self Report ◽  
Stop Signal Task ◽  
Alpha Power ◽  
Theta Band ◽  
Band Power ◽  
Theta Band Power

Inhibition, the ability to withhold a response or to stop an initiated response, is a necessary cognitive function that can be vulnerable to an impairment. High levels of impulsivity have been shown to impact response inhibition and/or cognitive task performance. The present study investigated the spectral and spatio-temporal dynamics of response inhibition, during a combined go/no-go/stop-signal task, using magnetoencephalography (MEG) in a healthy undergraduate student population. Participants were divided by their level of impulsivity, as assessed by self-report measures, to explore potential differences between high (n=17) and low (n=17) impulsivity groups. Results showed that individuals scoring high on impulsivity failed significantly more NOGO and STOP trials than those scoring low, but no significant differences were found between stop-signal reaction times. During NOGO and STOP conditions, high impulsivity individuals showed significantly smaller M1 components in posterior regions, which could suggest an attentional processing deficit. During NOGO trials, the M2 component was found to be reduced in individuals scoring high, possibly reflecting less pre-motor inhibition efficiency, whereas in STOP trials, the network involved in the stopping process was engaged later in high impulsivity individuals. The high impulsivity group also engaged frontal networks more during the STOP-M3 component only, possibly as a late compensatory process. The lack of response time differences on STOP trials could indicate that compensation was effective to some degree (at the expense of higher error rates). Decreased frontal delta and theta band power was observed in high impulsivity individuals, suggesting a possible deficit in frontal pathways involved in motor suppression, however, unexpectedly, increased delta and theta band power in central and posterior sensors was also observed, which could be indicative of an increased effort to compensate for frontal deficits. Individuals scoring highly also showed decreased alpha power in frontal sensors, suggesting decreased inhibitory processing, along with reduced alpha suppression in posterior regions, reflecting reduced cue processing. These results provide evidence for how personality traits, such as impulsivity, relate to differences in the neural correlates of response inhibition.

Hemispheric differences over frontal theta-band power discriminate between stimulus- versus memory-driven saccadic eye movement

2011 ◽  
Vol 504 (3) ◽  
pp. 204-208 ◽  
Author(s):  
Bruna Velasques ◽  
Sergio Machado ◽  
Flávia Paes ◽  
Juliana Bittencourt ◽  
Clayton Amaral Domingues ◽  
...  
Keyword(s):  
Eye Movement ◽  
Saccadic Eye Movement ◽  
Hemispheric Differences ◽  
Theta Band ◽  
Band Power ◽  
Theta Band Power

Effects of mental workload and fatigue on the P300, alpha and theta band power during operation of an ERP (P300) brain–computer interface

2014 ◽  
Vol 102 ◽  
pp. 118-129 ◽  
Author(s):  
Ivo Käthner ◽  
Selina C. Wriessnegger ◽  
Gernot R. Müller-Putz ◽  
Andrea Kübler ◽  
Sebastian Halder
Keyword(s):  
Mental Workload ◽  
Brain Computer Interface ◽  
Computer Interface ◽  
Theta Band ◽  
Band Power ◽  
Theta Band Power

Amygdaloid theta-band power increases during conflict processing in humans

2021 ◽  
Vol 91 ◽  
pp. 183-192
Author(s):  
Austin M. Tang ◽  
Kuang-Hsuan Chen ◽  
Angad S. Gogia ◽  
Roberto Martin Del Campo-Vera ◽  
Rinu Sebastian ◽  
...  
Keyword(s):  
Theta Band ◽  
Conflict Processing ◽  
Band Power ◽  
Theta Band Power

scholarly journals Dopaminergic hypo-activity and reduced theta-band power in autism spectrum disorder: A resting-state EEG study

2019 ◽  
Vol 146 ◽  
pp. 101-106 ◽  
Author(s):  
Taylor Hornung ◽  
Wen-Hsuan Chan ◽  
Ralph-Axel Müller ◽  
Jeanne Townsend ◽  
Brandon Keehn
Keyword(s):  
Autism Spectrum Disorder ◽  
Resting State ◽  
Autism Spectrum ◽  
Spectrum Disorder ◽  
Theta Band ◽  
Band Power ◽  
Theta Band Power

scholarly journals Balance task difficulty affects postural sway and cortical activity in healthy adolescents

2020 ◽  
Vol 238 (5) ◽  
pp. 1323-1333 ◽  
Author(s):  
Arnd Gebel ◽  
Tim Lehmann ◽  
Urs Granacher
Keyword(s):  
Power Spectrum ◽  
Task Difficulty ◽  
Postural Sway ◽  
Cortical Activity ◽  
Theta Band ◽  
Brain Areas ◽  
Frequency Bands ◽  
Band Power ◽  
Balance Task ◽  
Theta Band Power

Abstract Electroencephalographic (EEG) research indicates changes in adults’ low frequency bands of frontoparietal brain areas executing different balance tasks with increasing postural demands. However, this issue is unsolved for adolescents when performing the same balance task with increasing difficulty. Therefore, we examined the effects of a progressively increasing balance task difficulty on balance performance and brain activity in adolescents. Thirteen healthy adolescents aged 16–17 year performed tests in bipedal upright stance on a balance board with six progressively increasing levels of task difficulty. Postural sway and cortical activity were recorded simultaneously using a pressure sensitive measuring system and EEG. The power spectrum was analyzed for theta (4–7 Hz) and alpha-2 (10–12 Hz) frequency bands in pre-defined frontal, central, and parietal clusters of electrocortical sources. Repeated measures analysis of variance (rmANOVA) showed a significant main effect of task difficulty for postural sway (p < 0.001; d = 6.36). Concomitantly, the power spectrum changed in frontal, bilateral central, and bilateral parietal clusters. RmANOVAs revealed significant main effects of task difficulty for theta band power in the frontal (p < 0.001, d = 1.80) and both central clusters (left: p < 0.001, d = 1.49; right: p < 0.001, d = 1.42) as well as for alpha-2 band power in both parietal clusters (left: p < 0.001, d = 1.39; right: p < 0.001, d = 1.05) and in the central right cluster (p = 0.005, d = 0.92). Increases in theta band power (frontal, central) and decreases in alpha-2 power (central, parietal) with increasing balance task difficulty may reflect increased attentional processes and/or error monitoring as well as increased sensory information processing due to increasing postural demands. In general, our findings are mostly in agreement with studies conducted in adults. Similar to adult studies, our data with adolescents indicated the involvement of frontoparietal brain areas in the regulation of postural control. In addition, we detected that activity of selected brain areas (e.g., bilateral central) changed with increasing postural demands.

Theta band power in the human scalp EEG and the encoding of new information

Neuroreport ◽  
1996 ◽  
Vol 7 (7) ◽  
pp. 1235-1240 ◽  
Author(s):  
W. Klimesch ◽  
M. Doppelmayr ◽  
H. Russegger ◽  
T. Pachinger
Keyword(s):  
Theta Band ◽  
Scalp Eeg ◽  
Band Power ◽  
New Information ◽  
Theta Band Power

Theta band power changes in normal and dyslexic children

2001 ◽  
Vol 112 (7) ◽  
pp. 1174-1185 ◽  
Author(s):  
W Klimesch ◽  
M Doppelmayr ◽  
H Wimmer ◽  
J Schwaiger ◽  
D Röhm ◽  
...  
Keyword(s):  
Theta Band ◽  
Band Power ◽  
Theta Band Power

Haptische Wahrnehmung und EEG-Veränderungen bei Anorexia nervosa

1999 ◽  
Vol 27 (4) ◽  
pp. 241-250 ◽  
Author(s):  
M. Grunwald ◽  
C. Ettrich ◽  
B. Assmann ◽  
A. Dähne ◽  
W. Krause ◽  
...  
Keyword(s):  
Anorexia Nervosa ◽  
Sich Eine ◽  
Theta Band ◽  
Theta Power ◽  
Band Power ◽  
Theta Band Power

Zusammenfassung: Fragestellung: 1. Die haptische Wahrnehmungsfähigkeit anorektischer Patientinnen (AN; n = 13) ist gegenüber gleichaltrigen gesunden Probanden (KO; n = 13) beeinträchtigt. 2. Die hirnelektrische Aktivität während haptischer Explorationsanforderungen ist bei anorektischen Patientinnen im Vergleich zu gesunden Kontrollen im Theta-Band (Power) über dem rechten parietalen Kortex signifikant geringer ausgeprägt. Methodik: Die Struktur von 6 Tiefenreliefmustern sollte mit beiden Händen, bei geschlossenen Augen, erfaßt und zeichnerisch (mit geöffneten Augen) reproduziert werden. Sowohl während der haptischen Explorationsanforderungen als auch in anforderungsfreien Ruhesituationen wurde ein 19kanaliges EEG aufgezeichnet und spektrale EEG-Parameter (absolute Theta-Power) berechnet. Ergebnisse: Es konnte gezeigt werden, daß die Wahrnehmungsgüte der anorektischen Patientinnen im haptischen Test gegenüber gesunden Kontrollpersonen deutlich eingeschränkt war. Die spektrale Leistung der AN Gruppe im Theta-Band war gegenüber der Kontrollgruppe unter Ruheanforderungen über Pz und T6 höher und unter haptischen Explorationsbedingungen über P3, Pz, P4, T6, O1 und O2 geringer ausgeprägt. Dabei zeigte sich eine geringere Power in der Patientengruppe über dem rechten parietalen Kortex. Während der haptischen Explorationsbedingungen - im Vergleich zu den Ruhebedingungen - zeigte sich bei der Patientengruppe eine global über dem Kortex verteilte Abnahme der Theta-Leistung. Die Verteilung der Theta-Aktivität in der AN Gruppe spricht für eine erhöhte perzeptiv-kognitive Ressourcenbeanspruchung während der Testanforderungen und für einen gestör ten multisensorischen Integrationsprozeß im rechten Parietallappen.

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