Corpus ID: 146991150

Corticofugally induced c-fos expression, synchronized oscillation and its propagation in the thalamus

  title={Corticofugally induced c-fos expression, synchronized oscillation and its propagation in the thalamus},
  author={Yiping Guo},
A variety of fast and slow rhythmic brain oscillations have been revealed to occur spontaneously during different behavioral states. Fast rhythms are associated with cognition, and slow rhythms (e.g. spindle, 7-15 Hz; delta, 1-4 Hz; slow oscillation, 0.3-1 Hz) define the slow-wave sleep. However, the precise cellular and synaptic mechanisms underlying these different rhythms remain unclear and much controversial despite intensive investigations in the past two decades. Even little evidence is… Expand


Intracortical and corticothalamic coherency of fast spontaneous oscillations.
  • M. Steriade, F. Amzica
  • Physics, Medicine
  • Proceedings of the National Academy of Sciences of the United States of America
  • 1996
The synchronization of fast rhythms and their high amplitudes indicate that the term "EEG desynchronization," used to designate brain-aroused states, is incorrect and should be replaced with the original term, "EEEG activation". Expand
Synchronization of low-frequency rhythms in corticothalamic networks
The similarity between the slow oscillation under ketamine-xylazine anaesthesia and that occurring during the natural state of resting sleep is demonstrated and no topography is found in the distribution of synchronization between thalamic reticular and thalamocortical cells. Expand
Cellular basis of EEG slow rhythms: a study of dynamic corticothalamic relationships
  • D. Contreras, M. Steriade
  • Physics, Medicine
  • The Journal of neuroscience : the official journal of the Society for Neuroscience
  • 1995
During low-frequency oscillatory states, characteristic of slow-wave sleep, neocortical and thalamic neurons display phase relations that are restricted to narrow time windows, and that synchronization results from a generalized inhibitory phenomenon. Expand
Synchronization of fast (30-40 Hz) spontaneous cortical rhythms during brain activation
The experiments demonstrate that the conventional notion of a totally desynchronized cortical activity upon arousal should be revised as fast rhythms are enhanced and synchronized within intracortical networks during brain activation. Expand
Cortical coupling in sleep and paroxysmal oscillations
Abstract Intracellular and electroencephalographic (EEG) studies in animals and humans show that a major sleep rhythm, the slow oscillation (0.5–1 Hz), is generated and synchronized withinExpand
Intracellular analysis of relations between the slow (< 1 Hz) neocortical oscillation and other sleep rhythms of the electroencephalogram
The data indicate that the thalamus is not essentially implicated in the genesis of the slow rhythm, and through the contralateral thalamocortical systems and callosal projections, also transected the corpus callosum in thalamically lesioned animals, and still recorded theslow rhythm in cortical neurons. Expand
Synchronization of fast (30-40 Hz) spontaneous oscillations in intrathalamic and thalamocortical networks
The data demonstrate that fast rhythms are part of the background electrical activity of the brain and that desynchronization, used to designate brain-active states, is an erroneous term inasmuch as the fast oscillations are synchronized not only in intracortical but also in intrathalamic and TC networks. Expand
Grouping of brain rhythms in corticothalamic systems
The experimental evidence for unified oscillations derived from simultaneous intracellular recordings of cortical and thalamic neurons in vivo, while recent studies in humans using global methods provided congruent results of grouping different types of slow and fast oscillatory activities. Expand
Network modulation of a slow intrinsic oscillation of cat thalamocortical neurons implicated in sleep delta waves: cortically induced synchronization and brainstem cholinergic suppression
This study proposes that the potentiating influence of the corticothalamic input results from the engagement of two GABAergic thalamic cell classes, reticular and local-circuit neurons, and proposes a progressive hyperpolarization of thalamocortical neurons with the deepening of the behavioral state of EEG-synchronized sleep. Expand
Corticothalamic Inputs Control the Pattern of Activity Generated in Thalamocortical Networks
It is suggested that differential activation of thalamic GABAA and GABAB receptors in response to varying corticothalamic input patterns may be critical in setting the oscillation frequency of thalamocortical network interactions. Expand