Top-down attentional processing enhances auditory evoked gamma band activity

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.

[1]  W. Singer,et al.  Dynamic predictions: Oscillations and synchrony in top–down processing , 2001, Nature Reviews Neuroscience.

[2]  M. Fabiani,et al.  Changes in brain activity patterns in aging: the novelty oddball. , 1995, Psychophysiology.

[3]  Joachim Röschke,et al.  Time course of human 40 Hz EEG activity accompanying P3 responses in an auditory oddball paradigm , 1997, Neuroscience Letters.

[4]  Tamer Demiralp,et al.  The phase‐locking of auditory gamma band responses in humans is sensitive to task processing , 1997, Neuroreport.

[5]  K. Reinikainen,et al.  Selective attention enhances the auditory 40-Hz transient response in humans , 1993, Nature.

[6]  J. Pernier,et al.  Stimulus Specificity of Phase-Locked and Non-Phase-Locked 40 Hz Visual Responses in Human , 1996, The Journal of Neuroscience.

[7]  W Singer,et al.  Visual feature integration and the temporal correlation hypothesis. , 1995, Annual review of neuroscience.

[8]  D. Wilkin,et al.  Neuron , 2001, Brain Research.

[9]  R. Desimone,et al.  The Role of Neural Mechanisms of Attention in Solving the Binding Problem , 1999, Neuron.

[10]  W. Singer,et al.  Stimulus-dependent synchronization of neuronal responses in the visual cortex of the awake macaque monkey , 1996, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[11]  A. Labarga,et al.  Gamma band activity in an auditory oddball paradigm studied with the wavelet transform , 2001, Clinical Neurophysiology.

[12]  F. Rösler,et al.  Stimulus-induced gamma oscillations: harmonics of alpha activity? , 1995, Neuroreport.

[13]  A. Treisman.  The binding problem , 1996, Current Opinion in Neurobiology.

[14]  Axel Mecklinger,et al.  Gamma activity in human EEG is related to highspeed memory comparisons during object selective attention , 2001 .

[15]  D. Friedman,et al.  The novelty P3: an event-related brain potential (ERP) sign of the brain's evaluation of novelty , 2001, Neuroscience & Biobehavioral Reviews.

[16]  Matthias M. Müller,et al.  Visually induced gamma-band responses in human electroencephalographic activity — a link to animal studies , 1996, Experimental Brain Research.

[17]  A. Engel,et al.  Auditory novelty oddball allows reliable distinction of top-down and bottom-up processes of attention. , 2002, International journal of psychophysiology : official journal of the International Organization of Psychophysiology.

[18]  M. Müller.  Object processing in the infant brain. , 2001, Science.

[19]  R. Desimone,et al.  Modulation of Oscillatory Neuronal Synchronization by Selective Visual Attention , 2001, Science.

[20]  W. Singer,et al.  Oscillatory responses in cat visual cortex exhibit inter-columnar synchronization which reflects global stimulus properties , 1989, Nature.

[21]  E. Basar,et al.  Gamma-band responses in the brain: a short review of psychophysiological correlates and functional significance. , 1996, International journal of psychophysiology : official journal of the International Organization of Psychophysiology.

[22]  V. Samar,et al.  Wavelet Analysis of Neuroelectric Waveforms: A Conceptual Tutorial , 1999, Brain and Language.

[23]  R. Knight,et al.  Mechanisms of human attention: event-related potentials and oscillations , 2001, Neuroscience & Biobehavioral Reviews.

[24]  C. Herrmann,et al.  Gamma responses and ERPs in a visual classification task , 1999, Clinical Neurophysiology.

[25]  M. Corbetta,et al.  Control of goal-directed and stimulus-driven attention in the brain , 2002, Nature Reviews Neuroscience.