The aim of this study was to analyse the electroencephalogram (EEG) background activity of Alzheimer's disease (AD) patients using multiscale entropy (MSE). MSE is a recently developed method that quantifies the regularity of a signal on different time scales. These time scales are inspected by means of several coarse-grained sequences formed from the analysed signals. We recorded the EEGs from...

Sleep is a dynamic process involving complex neural activation. In 1929 the psychiatrist Hans Berger established that brain activity was different during wakefulness and sleep by recording cortical electrical potentials. He termed these recordings electroencephalograms and by the mid-1930s the cyclical patterns associated with NREM sleep had been categorised. The first observations of REM sleep...

We compare the predictions of the dissipative quantum model of brain with neurophysiological data collected from electroencephalograms resulting from high-density arrays fixed on the surfaces of primary sensory and limbic areas of trained rabbits and cats. Functional brain imaging in relation to behavior reveals the formation of coherent domains of synchronized neuronal oscillatory activity and...

OBJECTIVE To determine whether divers with histories of neurological decompression illness are electroencephalographically distinguishable from non-divers. METHODS The electroencephalograms (EEGs) from 68 divers with histories of neurological decompression illness and 45 non-diver controls were examined independently by two clinical neurophysiologists. RESULTS The diver and non-diver groups...

Cycloscopic analyses of a series of electroencephalograms obtained from a mixed group of individuals, clinically classified as normal, schizophrenic, and "frank" epileptic, show the following characteristics: 1. A rather closely regulated potential oscillation which remains predominant throughout the sample of record under study. 2. Associated with this dominant cycle other definite anharmonic ...

Within the field on biomedical engineering, the majority of compression research has focused on encoding medical images, electrocardiograms, and electroencephalograms. Although long-term myoelectric signal (MES) acquisition is important for neuro-muscular system analysis and telemedicine applications, very few studies have been published on MES compression. This research investigates static and...

C. S. Carver and E. Harmon-Jones (2009) reviewed evidence consistent with the idea that anger arises from a behavioral approach system. Commentary on that article by A. J. Tomarken and D. H. Zald (2009) raised questions about the many elements involved in acts of approach and limitations on what information can be provided by electroencephalograms. Commentary by D. Watson (2009) raised question...