Sex differences in EEG coherence during a verbal memory task in normal adults

Volf, N. V.; Om, Razumnikova

doi:10.1016/s0167-8760(99)00067-7

Cited by 58 publications

(38 citation statements)

References 52 publications

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“…Common coherence patterns were predominately found in lower but not in higher frequency bands. Results were supported by a study of Volf and Razumnikova (1999), who applied coherence analysis to 30 subjects whilst they memorized dichotically presented lists of concrete nouns. Besides frequency band specific results, mainly coherence increase was found compared to a resting condition.…”

Section: Category Types During Verbal Memory Encodingmentioning

confidence: 69%

“…The relation between intra-and interhemispheric cooperation (coherence) is also influenced by the gender of the participants. Women seem to have higher interhemispheric and right hemispheric coherence whilst memorizing verbal stimuli (Volf & Razumnikova, 1999). Coherence is also able to differentiate between the quality of performance of individuals and groups (Weiss, Cromecek, & Rappelsberger, 1998b).…”

Section: Resultsmentioning

confidence: 99%

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The contribution of EEG coherence to the investigation of language

2003

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The contribution of EEG coherence analysis to the investigation of cognition and, in particular, language processing is demonstrated with examples of recent EEG studies. The concept of EEG coherence analysis is explained, and its importance emphasized in the light of recent neurobiological findings on frequency-dependent synchrony as a code of information processing between nerve cell assemblies. Furthermore, EEG coherence studies on naturally spoken and written word and sentence processing are reviewed and experimental results are presented giving new insights into the occurrence of ''transient functional language centers'' within the brain.

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Section: Category Types During Verbal Memory Encodingmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 99%

The contribution of EEG coherence to the investigation of language

2003

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“…It was suggested [25] that precisely this mechanism can "switch on" divergent-type thinking; the latter can be inhibited and activated selectively, and this modulates the process of formation of alternative solutions. The results of studies of the spatial/frequency organization of EEG activity using the appropriate tests gave reasons to believe that memorization of semantically meaningful verbal information is realized in women with the involvement of variative polymodal strategies, while "narrower" and more specific strategies are used in men [22,27].…”

Section: Resultsmentioning

confidence: 99%

Indices of Coherence of EEG Rhythms in the Course of Cognitive Activity as Markers of Creative Thinking: Gender Specificity

et al. 2016

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According to the results of psychological testing, persons aged 18 to 21 years were divided into four groups, women and men with low and high productivity of divergent (creative, nonroutine) thinking (n = = 18 to 23). Results of EEG recording (19 leads) were used for calculation of the coherence coefficients for oscillations of the delta, theta, alpha1, alpha2, alpha3, beta, and gamma frequencies in lead pairs and estimation of integral indices of coherence within the anterior and posterior cortical regions and between these zones (interaction coefficients, IC1-IC3, respectively). EEG was recorded in the resting state and in the course of resolving convergent-and divergent-type cognitive test tasks. It was found that, during the performance of tests of both types, men with a higher productivity of divergent thinking demonstrated significantly higher values of IC1 (that characterizes the coherence in associative linkages within the anterior cortex) for oscillations of all EEG frequency ranges compared with the respective estimates for "low-creative" men. Similar increments were typical of the IC2 values for low-and midfrequency EEG rhythms (delta, theta, and alpha). At the same time, values of the "interregional" IC3 for theta, beta, and gamma activity in "high-creativity" men were significantly lower. In women of both groups (low and high creativity), such specificity of the IC1-IC3 patterns was practically not observed, i.e., the respective aspect demonstrated clear gender specificity. The sex of the subjects and type of the performed cognitive tests could not be considered factors significantly affecting the calculated absolute IC values. The observed specificities of integral coherence indices are probably associated with different strategies of the performance of cognitive tasks in men and women. Our findings allow us to believe that the above interrelations between integrated coherence indices can be used as EEG markers of high productivity of divergent thinking in men. The more flexible strategies of thinking in women are probably related to more variable neurophysiological cortical mechanisms (compared with those in men), and this type of organization is not clearly reflected in the pattern of intracortical interactions estimated by coherence indices.

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“…Signifi cant differences in beta band were not found. One of the studies showed enhanced upper beta (25-30) Hz and suppressed mid beta (13)(14)(15)(16)(17)(18)(19)(20) Hz activity mainly localized to posterior electrodes where mid beta suppression indicated increased attentional processes and memory demands. 17 But we did not divide beta into upper and lower beta so we did not have the similar result.…”

Section: Discussionmentioning

confidence: 99%

“…For the same purpose males were taken because literature has shown that men and women have different hemispheric lateralization, dominant hemispheres and rates of intrahemispheric transfer. 13 Undergraduate and post graduate were selected because studies have shown that age, sex and education affects the performance during Stroop test.…”

Section: Discussionmentioning

confidence: 99%

Electroencephalographic changes during selective attention

et al. 2014

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Background: Though many studies are conducted during attention process, it is still not clear how brain deals with attention. So we conducted a study to fi nd out the electroencephalographic changes during selective attention. Methods: Thirty healthy right handed male students aged 23.1±2.8 yrs were asked to read congruent (red printed in red ink) and incongruent ( [19.23 (13.61-25.79) vs. 13.95 (10.40-16.67) sites. Also during incongruent card reading, alpha1 power signifi cantly decreased in F8 [3.39(2.63-4.63) to 2.75 (1.93-4.7)] and alpha 2 power signifi cantly decreased in P3 6.84 [(4.88-10.46) to 5.74 (4.78-19.95)] sites. Conclusion: During selective attention, theta gets synchronized at fronto-central regions and alpha2 desynchronized at parietal regions. The theta and alpha1 at inferior frontal regions were also desynchronized in selective attention.

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Sex differences in EEG coherence during a verbal memory task in normal adults

Cited by 58 publications

References 52 publications

The contribution of EEG coherence to the investigation of language

The contribution of EEG coherence to the investigation of language

Indices of Coherence of EEG Rhythms in the Course of Cognitive Activity as Markers of Creative Thinking: Gender Specificity

Electroencephalographic changes during selective attention

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