A mechanism for generation of long-range synchronous fast oscillations in the cortex
Article Abstract:
Previous research has shown that synchronous neuronal oscillations between 30 and 70 Hz occur in the cortex of most higher organisms. Also known as gamma oscillations, the precise mechanics of such a phenomenon has been difficult to ascertain given their long periods of phase lags. However, a model incorporating the properties of excitatory pyramidal cells and inhibitory interneurons has been able to predict the generation of gamma oscillations. The model monitors the production of pairs of spikes in rapid succession to determine the generation of gamma oscillations.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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Synchronized oscillations in interneuron networks driven by metabotropic glutamate receptor activation
Article Abstract:
Cross-correlation and power spectrum analysis of slices of rat hippocampus and neocortex reveal a 40-Hz oscillation in inhibitory neuron networks. Synapses engaging gamma-aminobutyric acid receptors connect these networks, whose oscillations are initiated by metabotropic glutamate receptor activation. The overall excitation of interneurons, potentials of inhibitory postsynapses, intrinsic membrane resonance and loop-loop interaction affect the frequency of the interneuron network oscillations.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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Attention modulates synchronized neuronal firing in primate somatosensory cortex
Article Abstract:
The synchronous firing of neuron pairs in the secondary somatosensory cortex (SII) of three monkeys was examined when visual and tactile tasks were undertaken. Most neuron pairs fired synchronously with the rate of synchrony affected by the attentional state of the monkey. 35% of neuron pairs that fired synchronously during the most difficult task changed their rate of synchrony when attention was switched between tactile and visual tasks.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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- Abstracts: Categorization of behavioral sequences in the prefrontal cortex. Integration of target and body-part information in the premotor cortex when planning action
- Abstracts: Separate body- and world-referenced representations of visual space in parietal cortex. Integration of motion and stereopsis in middle temporal cortical area of macaques