Oscillatory Event-Related Brain Dynamics

✍ Scribed by Manfried Hoke (auth.), Christo Pantev, Thomas Elbert, Bernd Lütkenhöner (eds.)

• Publisher: Springer US
• Year: 1994
• Tongue: English
• Leaves: 469
• Series: NATO ASI Series 271
• Edition: 1
• Category: Library

✦ Synopsis

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.

✦ Table of Contents

Front Matter....Pages i-ix
Introductory Talk....Pages 1-8
Introductory Remarks....Pages 9-10
A Comparative Survey of Event Related Brain Oscillations....Pages 11-26
Physiologic and Epileptic Oscillations in a Small Invertebrate Network....Pages 27-42
Cortico-Hippocampal Interplay: Synopsis of a Theory....Pages 43-51
What is the Contribution of Axonal Conduction Delay to Temporal Structure in Brain Dynamics?....Pages 53-57
Coherent Assembly Dynamics in the Cortex: Multi-Neuron Recordings, Network Simulations and Anatomical Considerations....Pages 59-83
Temporal Aspects of Information Processing in Areas V1 and V2 of the Macaque Monkey....Pages 85-98
Oscillations and Synchrony in the Visual Cortex: Evidence for Their Functional Relevance....Pages 99-114
Oscillatory and Non-Oscillatory Synchronizations in the Visual Cortex of Cat and Monkey....Pages 115-134
Event-Related Changes in the 40 Hz Electroencephalogram in Auditory and Visual Reaction Time Tasks....Pages 135-146
Attentional Effects on Image-Motion Related Potentials and Spectral Perturbations....Pages 147-166
Retinal and Cortical Oscillatory Responses to Patterned and Unpatterned Visual Stimulation in Man....Pages 167-181
Low Temporal Frequency Desynchronization and High Temporal Frequency Synchronization Accompany Processing of Visual Stimuli in Anaesthetized Cat Visual Cortex....Pages 183-204
High-Frequency Activity (600 Hz) Evoked in the Human Primary Somatosensory Cortex: A Survey of Electric and Magnetic Recordings....Pages 205-218
The Transient Auditory Evoked Gamma-Band Field....Pages 219-230
Stimulus Frequency Dependence of the Transient Oscillatory Auditory Evoked Responses (40 Hz) Studied by Electric and Magnetic Recordings in Human....Pages 231-242
Gamma-Band Responses Reflect Word/Pseudoword Processing....Pages 243-258
Time- and Frequency-Domain Analyses of Auditory Evoked Fields....Pages 259-274
Electrocortical Rhythms in the Attentive Cat: Phenomenological Data and Theoretical Issues....Pages 275-293
Models for the Neuronal Implementation of Selective Visual Attention Based on the Temporal Structure of Neural Signals....Pages 295-309
20 Hz Bursts of Activity in the Cortico-Thalamic Pathway During Attentive Perception....Pages 311-324
SSR-Modulation During Slow Cortical Potentials....Pages 325-341
Synchronous Oscillations in Sensorimotor Cortex of Awake Monkeys and Humans....Pages 343-356
Event-Related Desynchronization (ERD) and 40-Hz Oscillations in a Simple Movement Task....Pages 357-366
Subcortical P300-40-Hz Response of the Cat Brain....Pages 367-382
Stimulus-Related Oscillatory Responses in the Auditory Cortex of Cats....Pages 383-388
Detection of Unaveraged Spontaneous and Event-Related Electrophysiological Activities from Focal Regions of the Cerebral Cortex in the Swine....Pages 389-400
Cognition and Local Changes in Brain Oscillations....Pages 401-414
Tuning and Filtering in Associative Learning....Pages 415-433
Possibilities of Functional Brain Imaging Using a Combination of MEG and MRT....Pages 435-457
Back Matter....Pages 459-468

✦ Subjects

Neurology; Neurosurgery; Animal Physiology; Biophysics and Biological Physics; Neurosciences