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- W1965599180 abstract "Intracellular recordings from 216 thalamocortical (TC) neurones in the ventrolateral (VL) nucleus of intact‐cortex and decorticated cats under ketamine–xylazine anaesthesia revealed spontaneously occurring fast oscillations (mainly 30–100 Hz) in 86% of investigated cells. The fast depolarizing events consisted of excitatory postsynaptic potentials (EPSPs), giving rise to fast prepotentials (FPPs) in 22% of neurones, which eventually lead to full‐blown action potentials. The frequency of fast events changed by factors of 2–5 in periods as short as 0.3–1.0 s. The spontaneous oscillations were similar to responses evoked in VL relay neurones by stimuli to the afferent cerebellofugal axons in brachium conjunctivum (BC) and were strikingly reduced or abolished after electrolytic lesion of BC axons. The amplitude and duration of fast depolarizing events were significantly reduced during the descending phase of the inhibitory postsynaptic potentials (IPSPs) in TC cells, related to spontaneous spindles or evoked by local thalamic stimulation. Averaged field potentials recorded from motor cortex and triggered by EPSPs and/or action potentials of intracellularly recorded VL cells demonstrated that both spontaneous and BC‐evoked fast depolarizations in VL relay neurones were coherent with fast rhythms in cortical area 4. These results show that, in addition to the thalamic and cortical generation sites of the fast (so‐called gamma) oscillations, prethalamic relay stations, such as deep cerebellar nuclei, are major contributors to the induction of fast rhythms which depend on the depolarization of thalamic and cortical neurones and which represent a hallmark of brain activation patterns." @default.
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- W1965599180 date "1997-10-01" @default.
- W1965599180 modified "2023-10-15" @default.
- W1965599180 title "Fast (mainly 30-100 Hz) oscillations in the cat cerebellothalamic pathway and their synchronization with cortical potentials" @default.
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- W1965599180 doi "https://doi.org/10.1111/j.1469-7793.1997.153bf.x" @default.
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