Results 251 to 260 of about 482,888 (302)

The nature of the paradoxical phase of sleep

Neuroscience Translations, 1970
1. Paradoxical sleep is a complex phenomenon which can be divided into three stages: 1) the stage of general activation, or desynchronization of slow activity in all areas of the brain, 2) the stage of predominance of the hippocampal δ-rhythm and 3) the stage of predominance of the hippocampal ϕ-rhythm.
T N, Oniani, R, Mol'nar, T L, Naneĭshvili   +2 more
openaire   +2 more sources

Central mechanisms of paradoxical sleep

Brain and Development, 1984
Paradoxical sleep (PS) is composed of several characteristic "tonic" and "phasic" events. In this paper, it was shown that each of these "PS-subsystems" might be generated by distinct brainstem neuron groups and involved in the cholinergic, cholinoceptive, and monoaminoceptive mechanisms.
openaire   +2 more sources

The Thermophysiology of Paradoxical Sleep

Neuroscience and Behavioral Physiology, 2012
Paradoxical sleep (PS) is a “third” state in warm-blooded animals had humans (along with waking and slow-wave sleep) and is characterized by a high level of brain activity during deep sleep; there is a clear Russian “trace” in the discovery of PS. This review analyzes data on the interactions between PS and thermoregulation in thermally comfortable and
Yu. F. Pastukhov, I. V. Ekimova
openaire   +1 more source

NARCOLEPTIC SYNDROME AND PARADOXICAL SLEEP

Psychiatry and Clinical Neurosciences, 1966
SummaryIn order to elucidate the mechanism of the narcoleptic syndrome, the course of all‐night sleep was investigated by means of poly graphic methods or by using inducing stimuli. Further study on each symptom was performed in relation to the sleep mechanism using similar methods. Thirty‐three cases of typical narcolepsy were examined.
openaire   +2 more sources

Conditioned induction of paradoxical sleep in the rabbit

Experimental Neurology, 1964
Abstract Earlier electroencephalographic studies showed that sleep, including both spindle-slow wave and paradoxical phases, could be induced in estrogen-primed ovariectomized rabbits by low-frequency (5 cycle/sec) electrical stimulation of the hypothalamus or limbic system and that the threshold varied with the hormonal status of the animal.
M, KAWAKAMI, C H, SAWYER
openaire   +2 more sources

Effects of paradoxical sleep deprivation in the rabbit

Physiology & Behavior, 1986
The effects of nonpharmacologically-induced deprivation of paradoxical sleep for a 24 hour period were studied in rabbits. Response characteristics commonly associated with the deprivation procedure in other species were observed, as well as features apparently peculiar to the rabbit.
R T, Pivik, F W, Bylsma, P, Cooper
openaire   +2 more sources

Paradoxical sleep in the chick (Gallus domesticus)

Behavioral Biology, 1974
The states of sleep and wakefulness in chicks ( Gallus domesticus ), were classified by computerized monitoring of multiple unit activity, electroencephalographic, and electromyographic recordings. Chicks of 1 day, 1 week, 1 mo, and 4 mo of age, were monitored for Paradoxical Sleep (PS) on a 12 hr day-12 hr night cycle. No significant differences could
C J, Schlehuber, D G, Flaming, G D, Lange, C E, Spooner   +3 more
openaire   +2 more sources

Paradoxical sleep and coping with environmental change

Behavioural Brain Research, 1983
Long-term sleep recordings of mice from 3 inbred strains showed that the amount of time spent in sleep over successive 24-h periods varied as the subjects adapted to experimental conditions. A sinusoidal type variation, with a period of about 15 days, modulating the basic trends in sleep times is described; but the principal finding of this study ...
C M, Sinton, M, Jouvet
openaire   +2 more sources

Paradoxical sleep and memory storage processes

Behavioral Biology, 1977
This paper advances the view that during the paradoxical sleep (PS) phase, the brain sets in motion a “chain-of-events” that is necessary for learning ability and that these events are an integral component of memory storage processes. The evidence supporting the position taken in this paper comes from experiments showing that: (1) PS deprivation (PSD),
W, Fishbein, B M, Gutwein
openaire   +2 more sources

Neurons in Paradoxical Sleep and Motivated Behavior

Science, 1967
Single-cell recordings were taken with electrodes permanently implanted in unrestrained rats during normal sleep, paradoxical sleep, quiet awake, and highly motivated awake periods. In most areas, neuronal activity increased when normal sleep changed to paradoxical sleep.
W D, Mink, P J, Best, J, Olds
openaire   +2 more sources