Wolfgang Klimesch (1995) The P300 and Band Power in the Theta and Delta Range
. Psycoloquy: 6(45) Memory Brain (5)
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Psycoloquy 6(45): The P300 and Band Power in the Theta and Delta Range
THE P300 AND BAND POWER IN THE THETA AND DELTA RANGE
Reply to Verleger on Memory-Brain
Wolfgang Klimesch
University of Salzburg
Department of Physiological Psychology
Hellbrunnerstr. 34
A-5020 Salzburg
Austria
Klimesch@edvz.sbg.ac.at
Abstract
In his commentary, Verleger (1995) argues against the
proposal that the P300 is due to phase locked theta activity
(1995). He points out that most of the power of the P300 lies in
the delta range. Furthermore, he emphasizes his opinion that
without incorporating a variety of ERP-experiments, any theory
about brain physiology and memory will be incomplete. In my reply
I refer to data which indicate that regardless of the effects of
other frequency bands, theta power significantly influences the
amplitude and latency of the P300. With respect to incorporating
results from ERP-experiments, I argue that what would be needed is
a direct comparison between ERP-results and results from
comprehensive spectral analyses. For reasons outlined below, a
critical issue for such a comparison would be to determine
frequency bands individually for each subject.
Keywords
Alpha, EEG, Hippocampus, Memory, Oscillation, Thalamus,
Theta.
References
- Basar, E. (1992) Brain natural frequencies are causal factors for resonances and induced rhythms. In E. Basar & T. H. Bulock (eds.), Induced rhythms in the brain (p. 425-467). Boston: Birkhauser.
- Basar, E., & Schormann, M. (1995) Functional aspects of evoked alpha and theta responses in humans and cats. Biological Cybernetics, in press.
- Klimesch, W. (1995) Memory Processes Described as Brain Oscillations in the EEG-Alpha and Theta Bands. PSYCOLOQUY 6(6) memory-brain.1.klimesch.
- Klimesch, W., Schimke, H. & Schwaiger, J. (1994) Episodic and semantic memory: An analysis in the EEG-theta and alpha band. Electroencephalography & Clinical Neuro-physiology, 91, 428-441.
- Klimesch, W., Schimke, H. & Pienert, Ch. (1995) Frequency components of the P300. Manuscript in preparation.
- Schormann, M. & Basar, E. (1995) Topography of alpha and theta oscillatory responses upon auditory and visual stimuli in humans. Biological Cybernetics, in press.
- Verleger, R. (1995) Memory-related EEG Potentials: Slow Negativities, Priming Positivity, Recognition Positivity, and Dm. PSYCOLOQUY 6(27) memory-brain.3.verleger.