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223 results on '"Doppelmayr M"'

3. EEG Alpha Power and Intelligence.

Author

Doppelmayr, M., Klimesch, W., Stadler, W., Pollhuber, D., and Heine, C.

Abstract

Tested whether alpha power in different sub-bands is selectively related to intelligence. For 74 Austrian subjects, the EEG was recorded during a resting session and 2 different intelligence tests were performed. Findings show a strong positive correlation between intelligence and alpha power. (SLD)

Published
2002

4. Interindividual Differences in Alpha and Theta Power Reflect Memory Performance.

Author

Klimesch, W., Vogt, F., and Doppelmayr, M.

Abstract

Tested whether tonic EEG power is related to memory performance by analyzing ongoing EEG for 60 subjects in 5 experimental conditions. Subjects with good memory performance had significantly larger upper alpha power, but less theta and lower alpha power. Also discusses findings for subjects good at calculation. (SLD)

Published
1999

31. Brain Research Bulletin / Pre-stimulus alpha phase-alignment predicts P1-amplitude

Author

Fellinger, R., Klimesch, W., Gruber, W., Freunberger, R., and Doppelmayr, M.

Subjects
Alpha, genetic structures, Phase, ERP, P1
Abstract

Since years there is a hotly discussed dispute whether event-related potentials are either generated by an evoked component or by resetting of ongoing phase. We argue that phase-reset must not be proven in order to accept the general involvement of phase in ERP-generation as it is only one of several possible mechanisms influencing or generating certain ERP-components. Supporting data are presented showing that positive peaks of ongoing pre-stimulus alpha activity are not randomly distributed in time across trials. Most importantly, we found that a certain kind of pre-stimulus phase concentration that represents a continuous development of an alpha wave up to the time window where the P1 is generated is associated with an enlarged event-related component. We conclude that ongoing oscillations cannot be considered random background noise (even before stimulus onset) and that there are probably more phase-mechanisms that can contribute to the ERP-generation. P 21503-B18 (VLID)3979330

Published
2011
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33. Changes in EEG during Ultralong Running

Author

Doppelmayr, M., Sauseng, P., Doppelmayr, H., Mausz, I., Doppelmayr, M., Sauseng, P., Doppelmayr, H., and Mausz, I.

Abstract

There are only a few studies using human electroencephalograms (EEGs) to investigate bioelectrical changes in the brain during exercise (running or cycling). These studies report an increase in EEG alpha amplitude during and immediately after exercise. However, only exercises within a relatively short time interval of approximately 1 hour have been investigated. Thus, we focussed on long-lasting exercise and report three single case studies, performed on the same participant, during extended exercise and under different thermal conditions. EEG was recorded during a 12-, 24-, and 56-hour ultramarathon. The 56-hour race was performed under extreme thermal stress in Death Valley, CA, with temperatures well above 55uC/131uF. Analyzing the centre gravity frequency of the EEG alpha rhythm yielded a gradual decrease with time for the 12- and 24-hour races. In the 56-hour race, the centre frequency decreased only until the first sleeping period. Alpha amplitude, on the other hand, did not vary systematically. For all three races, the lowest alpha amplitude was observed during the last test session. This decrease is most likely due to cognitive and emotional changes but not to thermal stress, exhaustion, or sleep deprivation.

Published
2012

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