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A solution for reliable and valid reduction of ocular artifacts, applied to the P300 ERP.
The selection of instructions for subjects, the recording technique, the elimination of a few single trials significantly contaminated by eye movements, and the use of a correction procedure for ocular artifacts with calculable reliability and validity resulted in a set of data, in which 94% of the single trials were suitable for further analysis.
Assessing interactions in the brain with exact low-resolution electromagnetic tomography
- R. Pascual-Marqui, D. Lehmann, T. Kinoshita
- BiologyPhilosophical Transactions of the Royal Society A…
- 13 October 2011
A solution to this inverse problem that attains exact localization: exact low-resolution brain electromagnetic tomography (eLORETA) is reported, which yields high time-resolution intracranial signals that can be used for assessing functional dynamic connectivity in the brain.
Sleep spindles and their significance for declarative memory consolidation.
Results indicate that increased sleep stage 2 spindle activity is related to an increase in recall performance and, thus, may reflect memory consolidation in stage 2 sleep.
An E-Health Solution for Automatic Sleep Classification according to Rechtschaffen and Kales: Validation Study of the Somnolyzer 24 × 7 Utilizing the Siesta Database
The development and optimization of an automatic classification system that is based on one central EEG channel, two EOG channels and one chin EMG channel and proved the high reliability and validity of the Somnolyzer 24 × 7 and demonstrated its applicability in clinical routine and sleep studies.
Topographic distribution of sleep spindles in young healthy subjects
- J. Zeitlhofer, G. Gruber, P. Anderer, S. Asenbaum, P. Schimicek, B. Saletu
- Materials ScienceJournal of sleep research
- 1 September 1997
The application of an automatic sleep spindle detection procedure allowed the documentation of the topographic distribution of spindle characteristics, such as number, amplitude, frequency and…
Multichannel auditory event-related brain potentials: effects of normal aging on the scalp distribution of N1, P2, N2 and P300 latencies and amplitudes.
Low-resolution brain electromagnetic tomography revealed simultaneously active frontal and parietal sleep spindle sources in the human cortex
Instrumental conditioning of human sensorimotor rhythm (12-15 Hz) and its impact on sleep as well as declarative learning.
Relative SMR amplitude increased over 10 instrumental conditioning sessions and this "shaping of one's own brain activity" improved subsequent declarative learning and facilitated the expression of 12-15 Hz spindle oscillations during sleep.
Sleep spindle‐related activity in the human EEG and its relation to general cognitive and learning abilities
- Manuel Schabus, K. Hödlmoser, J. Zeitlhofer
- Psychology, BiologyThe European journal of neuroscience
- 1 April 2006
It is suggested that besides being involved in shaping neuronal networks after learning, sleep spindles do reflect important aspects of efficient cortical‐subcortical connectivity, and are thereby linked to cognitive‐ and memory‐related abilities alike.
Interrater reliability for sleep scoring according to the Rechtschaffen & Kales and the new AASM standard
The results of this study underline that the modification of the scoring rules improve IRR as a result of the integration of occipital, central and frontal leads, but decline IRR on the other hand specifically for N2, due to the new rule that cortical arousals with or without concurrent increase in submental electromyogram are critical events for the end of N2.