Ver�nderungen der Membranpolarisation und der Erregbarkeit von Zellen der motorischen Rinde w�hrend hochfrequenter Reizung der Formatio reticularis

Klee, Manfred R.; Lux, H. D.; Offenloch, Kurt

doi:10.1007/bf00395712

Cited by 7 publications

(4 citation statements)

References 34 publications

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“…A support for this interpretation would be that Klee and his coworkers observed a slow development of the hyperpolarizing response (Figs. 1, 2 of KLEE et al, 1964) while Akimoto and Saito observed a rapid depolarizing response (Fig. 8 of AKIMOTO and SAITO, 1966).…”

Section: Discussionmentioning

confidence: 93%

“…Klee and his coworkers (KLEE et al, 1964;KLEE, 1966) observed mainly a hyperpolarizing response, while AKIMOTO and SAITO (1966) showed a depolarizing response in most PT cells. If both authors mainly sampled fast PT cells, the effect of RF stimulation would be weaker in the lightly anaesthetized cats used by the former authors, than in the unanaesthetized preparations examined by the latter.…”

Section: Discussionmentioning

confidence: 97%

“…Reticular stimulation caused membrane depolarization in some PT cells and hyperpolarization in some others, and the rate of occurrence of these two changes was viewed differently by two groups of authors (KLEE et al, 1964;AKIMOTO and SAITO, 1966;KLEE, 1966). The possible mechanisms of these potential changes have not been known because of complications in the experimental design, the dual nature of the EEG arousal and the technical difficulty of large sampling.…”

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confidence: 99%

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Intracellular Recordings from the Motor Cortex during EEG Arousal in Unanaesthetized Brain Preparations of the Cat

et al. 1978

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1. Intracellular recordings were made from 92 neurones in the precruciate cortex of encephale isole and midpontine pretrigeminal preparations of the cat. 2. All but only one of these cells showed appreciable changes in the membrane potential during the transition from the cortical slow wave phase to the EEG arousal occurring spontaneously or induced by stimulating the midbrain reticular formation. Thus, 38 cells were depolarized (D-type cells), 48 cells hyperpolarized (H-type cells) and 5 cells showed an early hyperpolarization and a later depolarization (mixed type). 3. The latency of intracellular responses to reticular stimulation was shorter in the D-type cells than the H-type or mixed-type cells, and shorter for each of the D-and H-types in the cells of the superficial layers than those of the deep layers. 4. The D-type cells were distributed widely through laminae I to V, but the majority was sampled in lamina II. The H-type cells were located in laminae III-VI with the mode at the upper half of lamina III. The mixed-type cells were mostly located in laminae V and VI. 5. Antidromically identified slow pyramidal tract (PT) cells (n =9) all belonged to the D-type, and fast PT cells either to the H-(n=11) or the mixed type (n 4) . 6. These results suggest that the EEG arousal is a state composed of both excitatory and inhibitory responses of cortical cells which are processed from the superficial to the deep layers.EEG arousal (MORUZZI and MAGOUN, 1949) has been ascribed to one of the main manifestations of arousal of the brain, and may accompany the orienting or investigatory response which provides a turning point in animal behaviour (PAVLOV, 1927 ;MORUZZI, 1962 ;MAGOUN, 1963 ;SOKOLOV, 1963). Recent electrophysiological studies of EEG, extracellular units or field potentials recorded from various neocortical regions have revealed that neuronal responses on the EEG arousal

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Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 97%

mentioning

confidence: 99%

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Intracellular Recordings from the Motor Cortex during EEG Arousal in Unanaesthetized Brain Preparations of the Cat

et al. 1978

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“…Thus, DF and E responses were found separately by two groups of investigators in observations during reticular stimulation (KLEE et al, 1964;AKIMOTO and SAITO, 1966;KLEE, 1966). As was suggested in a previous paper (INUBUSHI et al, 1978a), this discrepancy has now been explicable by different intensities of EEG arousal.…”

Section: Discussionmentioning

confidence: 99%

Dual activity patterns of fast pyramidal tract cells and their family neurones during EEG arousal in the cat.

Ezure

Oshima

1981

Jpn.J.Physiol

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1. Intracellular activities of fast pyramidal tract (PT) cells and their family neurones were investigated during the EEG arousal of various degrees in terms of (1) the strength of natural or midbrain reticular stimuli, (2) the length of aroused EEG and (3) the extent of stage shift from EEG synchronization to desynchronization. 2. These cells showed a response pattern of either disfacilitation (DF), disfacilitation followed by excitation (DF+E) or excitation (E). DF and E components in these responses were respectively quantified with their amplitude and incidence, and their relations to the above-listed intensity parameters of EEG arousal were examined. 3. The threshold of eliciting DF response was lower than that for E response to natural and reticular stimuli. On intensifying the parameters of EEG arousal, accompanying increases were observed in E response but not in DF response. Rather, DF response was often masked by E response on application of relatively intense stimuli, or was decreased in a reciprocal manner to the increase of E response in accordance with the degree of EEG arousal. 4. It is postulated that the phasic and tonic phases of EEG arousal manifested, respectively, as the initial DF and late E responses bear different functions, the former representing the cerebral state of a general set on receipt of a novel stimulus, and the latter involving the state of actively responding to the stimulus by encoding its intensity.The initial phasic and late tonic phases of EEG arousal have been discriminated according to the differences in susceptibility to habituation (SHARPLESS and JASPER, 1956), in the amplitude of the cortical evoked potentials (WALSH and CORDEAU, 1965;ALLISON and GOFF, 1968;COURTOIS and CORDEAU, 1969) or in the firing rate of cortical neurones (STERIADE, 1970; STERIADE et al., 1974a, b;STERIADE and HOBSON, 1976). In the motor area of the cat cerebral cortex, fast pyramidal tract (PT) cells and some non-PT cells play a part of the index differentiating between these two phases of EEG arousal by displaying a dichotomic pattern consisting

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Neuronal Basis of Behavioral State Control

Hobson

Steriade

1986

Comprehensive Physiology

165

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Ver�nderungen der Membranpolarisation und der Erregbarkeit von Zellen der motorischen Rinde w�hrend hochfrequenter Reizung der Formatio reticularis

Cited by 7 publications

References 34 publications

Intracellular Recordings from the Motor Cortex during EEG Arousal in Unanaesthetized Brain Preparations of the Cat

Intracellular Recordings from the Motor Cortex during EEG Arousal in Unanaesthetized Brain Preparations of the Cat

Dual activity patterns of fast pyramidal tract cells and their family neurones during EEG arousal in the cat.

Neuronal Basis of Behavioral State Control

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