P.S. and reflex cataplexy in the pontile animal

Paradoxical Sleep - A Study of its Nature and Mechanisms

Michel Jouvet
Progress In Brain Research Vol. 18 Sleep Mechanisms 1965

TABLE OF CONTENTS

Introduction

Evidence of the duality of the states of sleep

(a) EEG and behavioural findings

(b) Phylogenetic findings

(c) Ontogenetic findings

(d) Functional findings

(e) Structural findings

Mechanisms of paradoxical sleep

(a) Producing P.S. as a reflex

(b) Results of deafferentations

(c) Role of the hypothalamus and pituitary

(d) Deprivation of P.S. in the pontile animal

(e) Effects of temperature on P.S. in the pontile animal

(f) Action of gamma-butyrolactone (G.B.L.)

(g) Osmolarity of the blood and paradoxical sleep

Discussion

(a) Duality of the states of sleep

(b) Mechanisms underlying the appearance of P.S.

Summary and Conclusions

Figures

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Figure 16 : P.S. and reflex cataplexy in the pontile animal

(1) Nociceptive stimulation of the ear (horizontal line) produces P.S. characterized by extinction of nuchal EMG activity and the appearance of a characteristic rhythmic activity in the nucleus reticularis pontis caudalis (PRF). Duration of reflex P.S.: 6 min;

(2) 3 min after cessation of P.S. the same nociceptive stimulation produces extinction of nuchal EMG activity for 3 min, but there is no change in activity in the pons.

Scale: 3 sec; 50 microV.