TY - JOUR
T1 - High-frequency cortical responses reflect lexical processing
T2 - An MEG study
AU - Pulvermüller, Friedemann
AU - Eulitz, Carsten
AU - Pantev, Christo
AU - Mohr, Bettina
AU - Feige, Bernd
AU - Lutzenberger, Werner
AU - Elbert, Thomas
AU - Birbaumer, Niels
PY - 1996/1
Y1 - 1996/1
N2 - Meaningful words and matched pseudowords, such as moon vs. noom, are of equal perceptual complexity, but invoke different cognitive processes. To investigate high-frequency cortical responses to these stimuli, biomagnetic signals were recorded simultaneously over both hemispheres of right-handed individuals listening to words and pseudowords. Consistent with earlier EEG studies, evoked spectral responses recorded from the left hemisphere revealed depression of spectral power in the low gamma band (around 30 Hz) after pseudowords but not after words. Similar differences between stimulus categories were present in the beta range. These results indicate that distinct patterns of high-frequency cortical responses correspond to the different cognitive processes invoked by words and pseudowords. It is hypothesized that differential high-frequency cortical responses signal the activation or activation failure of distributed Hebbian cell assemblies representing words and other elements of cognitive processing.
AB - Meaningful words and matched pseudowords, such as moon vs. noom, are of equal perceptual complexity, but invoke different cognitive processes. To investigate high-frequency cortical responses to these stimuli, biomagnetic signals were recorded simultaneously over both hemispheres of right-handed individuals listening to words and pseudowords. Consistent with earlier EEG studies, evoked spectral responses recorded from the left hemisphere revealed depression of spectral power in the low gamma band (around 30 Hz) after pseudowords but not after words. Similar differences between stimulus categories were present in the beta range. These results indicate that distinct patterns of high-frequency cortical responses correspond to the different cognitive processes invoked by words and pseudowords. It is hypothesized that differential high-frequency cortical responses signal the activation or activation failure of distributed Hebbian cell assemblies representing words and other elements of cognitive processing.
KW - 30 Hz
KW - Beta
KW - Cell assembly
KW - Cognitive
KW - Evoked spectral responses
KW - Gamma
KW - Language
KW - Magnetoencephalography
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U2 - 10.1016/0013-4694(95)00191-3
DO - 10.1016/0013-4694(95)00191-3
M3 - Article
C2 - 8689998
AN - SCOPUS:0030070790
VL - 98
SP - 76
EP - 85
JO - Electroencephalography and Clinical Neurophysiology
JF - Electroencephalography and Clinical Neurophysiology
SN - 0013-4694
IS - 1
ER -