* In vitro recordings of human neocortical oscillations.
- Electrophysiological oscillations are thought to create temporal windows of communication between brain regions. We show here that human cortical slices maintained in vitro can generate oscillations similar to those observed in vivo. We have characterized these oscillations using local field potential and whole-cell recordings obtained from neocortical slices acquired during epilepsy surgery. We confirmed that such neocortical slices maintain the necessary cellular and circuitry components, and in particular inhibitory mechanisms, to manifest oscillatory activity when exposed to glutamatergic and cholinergic agonists. The generation of oscillations was dependent on intact synaptic activity and muscarinic receptors. Such oscillations differed in electrographic and pharmacological properties from epileptiform activity. Two types of activity, theta oscillations and high gamma activity, uniquely characterized this model-activity not typically observed in animal cortical slices. We observed theta oscillations to be synchronous across cortical laminae suggesting a novel role of theta as a substrate for interlaminar communication. As well, we observed cross-frequency coupling (CFC) between theta phase and high gamma amplitude similar to that observed in vivo. The high gamma "bursts" generated by such CFC varied in their frequency content, suggesting that this variability may underlie the broadband nature of high gamma activity.
=>人間らしい, 人間の, 人, 人間
Overview of noun human
The noun human has 1 sense (first 1 from tagged texts)
1. (5) homo, man, human being, human -- (any living or extinct member of the family Hominidae
characterized by superior intelligence, articulate speech, and erect carriage)
Overview of adj human
The adj human has 3 senses (first 3 from tagged texts)
1. (46) human -- (characteristic of humanity; "human nature")
2. (19) human -- (relating to a person; "the experiment was conducted on 6 monkeys and 2 human
subjects")
3. (15) human -- (having human form or attributes as opposed to those of animals or divine beings;
"human beings"; "the human body"; "human kindness"; "human frailty")
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