Evidence of asymmetric interdependencies in human EEG under anaesthesia with Propofol

Item does not contain fulltextThe EEG may be regarded as a signal that reflects the activity of a dynamical system (the brain) To obtain information about the physiological processes involved in its generation new non linear mathematical methods of time series analysis have been developed to overcome the problems found in earlier studies. Moreover, the dynamical system approach can be used to analyze the inter-hemispheric differences in different behavioral states by means of multichannel recordings. The present work aims at applying the method of non-linear interdependencies to analyze the EEG during anesthesia induction with propofol in humans

Evidence of asymmetric interdependencies in human EEG under anaesthesia with Propofol

The EEG may be regarded as a signal that reflects the activity of a dynamical system (the brain) To obtain information about the physiological processes involved in its generation new non linear mathematical methods of time series analysis have been developed to overcome the problems found in earlier studies. Moreover, the dynamical system approach can be used to analyze the inter-hemispheric differences in different behavioral states by means of multichannel recordings. The present work aims at applying the method of non-linear interdependencies to analyze the EEG during anesthesia induction with propofol in humans

Dualism and uniformism in sleep

Contains fulltext : 63285.pdf (publisher's version ) (Closed access)The phenomenological evidence for distinguishing between REM and NREM sleep is overwhelming. However, this difference has only been found thanks to electrophysiological analytical methods, and is practically non existent in phenotypic terms, i.e., observable with the naked eye. It is well accepted that the selective pressure determining evolutionary changes can only work upon phenotypic differences. Hence, it follows that the differences between REM and NREM could not have been selected through evolution and this implies that, in functional terms, both states could be equivalent

Non-linear and fractal dynamics of absence-like phenomena (SWDs) in WAG/Rij rat EEGs

Item does not contain fulltextSpike-Wave Discharges (SWDs) occur spontaneously in the EEG of WAG/Rij rats. These SWDs are a model for human absence seizures. We examined whether non-linear methods and fractal analysis of the EEG contributes to the interpretation of SWDs