Showing papers by "Gert Pfurtscheller published in 1989"
TL;DR: The influence of planning of self-paced voluntary finger movements on alpha band components was studied and it is concluded that the side of movement is predetermined more than 1 sec before movement onset.
526 citations
TL;DR: EEG data from 30 channels were recorded during movement and reading tasks and analyzed in the three frequency bands 6– 8 Hz, 8–10 Hz and 10–12 Hz, showing that the ERD pattern varies with the frequency component analyzed.
Abstract: EEG data from 30 channels were recorded during movement and reading tasks and analyzed in the three frequency bands 6– 8 Hz, 8–10 Hz and 10–12 Hz. For each frequency band, the ERD (event-related desynchronization) was quantified and displayed in the form of time courses and maps. The results show that the ERD pattern varies with the frequency component analyzed. In general, upper alpha components (10–12 Hz) demonstrate a short-lasting, task-specific and localized ERD; the ERD of lower alpha components is long-lasting (> 1 sec) and widespread. The ERD can be interpreted as a sign of cortical activation, whereby desynchronization of upper alpha components may reflect more task-specific processes, and desynchronization of middle and lower alpha components may be related to the level of expectancy and attention.
52 citations
01 Jan 1989
TL;DR: This event-related desynchronization (ERD) of the EEG may be used as a highly sensitive parameter in detecting even slight functional disturbances of the cortical activity (Pfurtscheller and Aranibar 1977), provided that analytic methods of quantify these blocking reactions are available.
Abstract: The use of electroencephalography (EEG) as a diagnostic tool is based largely on a concept of human EEG normality defined by descriptive criteria, of which the alpha rhythm is the principal electrical activity (Berger 1929). One of the features of this activity is its tendency to be reduced in amplitude or to be blocked by either internal or external stimuli to the brain (Berger 1930). This event-related desynchronization (ERD) of the EEG may be used as a highly sensitive parameter in detecting even slight functional disturbances of the cortical activity (Pfurtscheller and Aranibar 1977), provided that analytic methods of quantify these blocking reactions are available.
3 citations
TL;DR: In this paper, the Effekte von Isofluran auf zerebrale and kardiovaskuläre Parameter wurden an 9 neurologisch unauffälligen Patienten untersucht.
Abstract: Die Effekte von Isofluran auf zerebrale und kardiovaskuläre Parameter wurden an 9 neurologisch unauffälligen Patienten untersucht. Im speziellen wurden dabei 2 Kanäle EEG-Leistungsspektren, akustisch evozierte Hirnstammpotentiale (BAEP), zervikale und kortikale somatosensorisch evozierte Potentiale (SEP), Herzrate (HR) , Herzratenvariabilität (HRV) und nicht-invasiv ermittelter Blutdruck (BP) unter folgenden Bedingungen untersucht: Isofluran mit N2O (1:1) bei 0,4; 0,6; 1,0 und 1,3 MAC sowie unter der Gabe von 100 % O2 und bei Spontanatmung.