Oscillatory Event-Related Brain Dynamics

Front Cover
How does the brain code and process incoming information, how does it recog nize a certain object, how does a certain Gestalt come into our awareness? One of the key issues to conscious realization of an object, of a Gestalt is the attention de voted to the corresponding sensory input which evokes the neural pattern underly ing the Gestalt. This requires that the attention be devoted to one set of objects at a time. However, the attention may be switched quickly between different objects or ongoing input processes. It is to be expected that such mechanisms are reflected in the neural dynamics: Neurons or neuronal assemblies which pertain to one object may fire, possibly in rapid bursts at a time. Such firing bursts may enhance the synaptic strength in the corresponding cell assembly and thereby form the substrate of short-term memory. However, we may well become aware of two different objects at a time. How can we avoid that the firing patterns which may relate to say a certain type of move ment (columns in V5) or to a color (V 4) of one object do not become mixed with those of another object? Such a blend may only happen if the presentation times be come very short (below 20-30 ms). One possibility is that neurons pertaining to one cell assembly fire syn chronously. Then different cell assemblies firing at different rates may code different information.

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Contents

Introductory Talk
1
Physiologic and Epileptic Oscillations in a Small Invertebrate Network
27
Synopsis of a Theory
43
Multineuron Recordings
59
Temporal Aspects of Information Processing in Areas V1 and V2
85
Evidence for Their
99
Oscillatory and NonOscillatory Synchronizations in the Visual Cortex
115
Event Related Changes in the 40 Hz Electroencephalogram in
135
Time and FrequencyDomain Analysis of Auditory Evoked Fields
259
Phenomenological
275
Models for the Neuronal Implementation of Selective Visual
295
Hz Bursts of Activity in the CorticoThalamic Pathway During
311
SSRModulation During Slow Cortical Potentials
325
Synchronous Oscillations in Sensorimotor Cortex of Awake
343
EventRelated Desynchronization ERD and 40Hz Oscillations
357
Subcortical P30040Hz Response of the Cat Brain
367

Attentional Effects on ImageMotion Related Potentials and
147
Retinal and Cortical Oscillatory Responses to Patterned and
167
Low Temporal Frequency Desynchronization and High Temporal
183
HighFrequency Activity 600 Hz Evoked in the Human Primary
205
The Transient Auditory Evoked GammaBand Field
219
Stimulus Frequency Dependence of the Transient Oscillatory
231
GammaBand Responses Reflect WordPseudoword Processing
243
StimulusRelated Oscillatory Responses in the Auditory Cortex of Cats
383
Detection of Unaveraged Spontaneous and Event Related
389
Cognition and Local Changes in Brain Oscillations
401
Tuning and Filtering in Associative Learning
415
Possibilities of Functional Brain Imaging Using a Combination
435
Index
463
Copyright

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