Top-down attentional processing enhances auditory evoked gamma band activity
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Top-down attentional processing enhances auditory evoked gamma band activity. / Debener, Stefan; Herrmann, Christoph S; Kranczioch, Cornelia; Gembris, Daniel; Engel, Andreas K.
In: NEUROREPORT, Vol. 14, No. 5, 15.04.2003, p. 683-6.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Top-down attentional processing enhances auditory evoked gamma band activity
AU - Debener, Stefan
AU - Herrmann, Christoph S
AU - Kranczioch, Cornelia
AU - Gembris, Daniel
AU - Engel, Andreas K
PY - 2003/4/15
Y1 - 2003/4/15
N2 - In contrast to animal studies, relatively little is known about the functional significance of the early evoked gamma band activity in humans. We investigated whether evoked and induced 40 Hz activity differentiate automatic, bottom-up aspects of attention from voluntary, top-down related attentional demands. An auditory novelty-oddball task was applied to 14 healthy subjects. As predicted, more evoked gamma was found for the target condition than in the two task-irrelevant conditions. Since gamma band activity was not enhanced for novel stimuli, the evoked gamma response cannot be explained with a simple concept of stimulus arousal. Neither induced gamma nor the degree of 40 Hz phase-locking were different between the experimental conditions. Taken together, our data emphasize the role of evoked gamma band activity for top-down attentional processing.
AB - In contrast to animal studies, relatively little is known about the functional significance of the early evoked gamma band activity in humans. We investigated whether evoked and induced 40 Hz activity differentiate automatic, bottom-up aspects of attention from voluntary, top-down related attentional demands. An auditory novelty-oddball task was applied to 14 healthy subjects. As predicted, more evoked gamma was found for the target condition than in the two task-irrelevant conditions. Since gamma band activity was not enhanced for novel stimuli, the evoked gamma response cannot be explained with a simple concept of stimulus arousal. Neither induced gamma nor the degree of 40 Hz phase-locking were different between the experimental conditions. Taken together, our data emphasize the role of evoked gamma band activity for top-down attentional processing.
KW - Acoustic Stimulation
KW - Adult
KW - Arousal
KW - Attention
KW - Brain
KW - Electroencephalography
KW - Evoked Potentials, Auditory
KW - Female
KW - Humans
KW - Male
KW - Reference Values
U2 - 10.1097/01.wnr.0000064987.96259.5c
DO - 10.1097/01.wnr.0000064987.96259.5c
M3 - SCORING: Journal article
C2 - 12692463
VL - 14
SP - 683
EP - 686
JO - NEUROREPORT
JF - NEUROREPORT
SN - 0959-4965
IS - 5
ER -