Vertes RP. Epub 2009 Oct 1. Dreaming has been a subject of cogitation since remote Antiquity. However, during desynchronized sleep it was drastically reduced, being entirely inhibited for most of the time. 89. Electroencephal Clin Neurophysiol 1966;21:562-77. Mori S, Matysuyama K, Kohyama J, Kobayashi y, Takakusaki K. Neuronal constituents of postural and locomotor control systems and their interactions in cats. Pompeiano O. In 1963 we found that cholinergic stimulation of a descending pathway (within Nauta's limbic-mesencephalic system) causes sleep (33). Depression of electrically induced reflexes (H- reflexes) in man during low voltage EEG sleep. 83. Experimental study. Movements of the eyes when the lids are closed. NeuroReport 1995;6:532-6. 19. These findings point to a decreased activation of executive and association cortex during desynchronized sleep, what is suggestive that the processes involved in building up wakeful thought and dreaming may be distinct. 107. Unfortunately, despite the opinion of great scientists of the past, most researchers that deal with sleep and dreaming, probably moved by philosophical, religious prejudice and a faulty reasoning, do not accept the idea that non-human animals do dream. During the past two decades several authors also did quantify the kinds of dreams. ), Brainstem Mechanisms of Behavior. Front Neurol. The reinterpretation of dreams: an evolutionary hypothesis of the function of dreaming. On the functional role of consciousness. & Ajmone-Marsan, C. 90. J Physiol (Paris) 1984;79:365-74. Theta waves, discovered by Jung and Kornmller in 1938 (72), were extensively studied by Green & Arduini (73), who proved they are related to arousal. Revonsuo A. Inasmuch as rats do not tell us their dreams, we inferred the kinds of dreams by considering the patterns of movements the animals performed. Animal experimentation, by making it possible to implant electrodes in any part of the nervous system and to lesion and stimulate (electrically or chemically) also any nucleus or pathway, has been of the utmost relevance for the understanding of the mechanisms causing not only sleep but also the manifestations of dreaming. Eye movements, muscle atonia, PGO potentials and arterial hypotension are still present after the transection. The gamma-alpha loop has been shown to play no role in producing the movements that characterize dreaming. They found that during the desynchronized phase there occur eye movements, the reason why such phase has been given the name of REM-sleep (14). Physiol Rev 1967;47:117-77. Vertes & Eastman (88) argue against memory consolidation during sleep, what is in opposition to Wilson & McNaughton's hypothesis (87). Neurosc Biobehav Rev 1992;16:372-97. (1962) clearly demonstrated that in the cat blood diastolic pressure falls deeply to around 60 mmHg, beginning as soon as the electrocorticogram starts to desynchronize. Roffwarg HP, Adrien J, Herman J, Pessah M, Spiro R, Bowe-Anders C. The middle ear muscle activity in the neurophysiology and psychophysiology of the REM state. Later, school and work dominate the mental field and the main features in dreams also change accordingly, supporting this hypothesis. Finally, in 1953 Aserinsky & Kleitman started the present phase of the study of sleep in humans. 13 Loomis AL, Harvey DN, Hobart GA. Distribution of disturbance patterns in the human electroencephalogram, with special reference to sleep. Desynchronized sleep can be provoked by carbachol infusion in the pontine reticular formation (94). Desynchronized sleep has been identified in many mammals and birds (16) but below the birds only in crocodiles brief periods of an equivalent phase (eye movements, low voltage electro-oscillograms and cervical hypotonia) seem to occur (17). WebThe leading theory of dreaming in the early decades of this research was the psychoanalytic, which views dreams as highly meaningful reflections of unconscious mental functioning. The atonia of myoclonia of active (REM) sleep. 114. 77. Valle AC, Timo-Iaria C, Sameshima K, yamashita R. Theta waves and behavioral manifestations of alertness and dreaming activity in the rat. Clin Chest Med 1985;6:563-75. Timo-Iaria C, yamashita R, Hoshino K, Sousa-Melo A. Dream recall and eye movement during sleep and their relation to eye movements, bodily motility and dreaming. With developments in understanding of the neurophysiology of REM sleep, new theories of dreaming were proposed. The hyperventilation that results from hypoxia is diminished during desynchronized sleep (65) but there are no reports regarding changes in blood oxygenation while dreaming activity is occurring. In rats, heart rate is clearly accelerated during the periods of oniric activity, expressed as rostrum+vibrissae, eye, head, ear and limb movements. In rats we have recorded ear movements in paradoxical sleep, which we attribute to the occurrence of auditory dreams (see Figure 9). Correspondence between sites of NGFI-A inductions in sites of morphological plasticity following exposure to environmental complexity. Cesar Timo-Iaria (in memorian); Angela Cristina do Valle. It is most likely an elementary brain activity in homeotherms and thus, if dreaming has a function, it probably plays a similar role in the human brain and in nonhuman brains as well. Arch Ital Biol 1962;100:216-22. Vertes RP, Kocsis B. Brainstem-diencephalo-septohippocampal systems controlling the theta rhythm of the hippocampus. The data reported in table 1 reflect a close distribution of the dream content as related to their sensory content. It is well known that during desynchronized sleep the pupil undergoes an increase in diameter (midriasis), which is not produced by direct sympathetic activation but rather to parasympathetic inactivation, that overcomes the tonic pupillary constrictor activity of the parasympathetic system during synchronized sleep. Esquirol, one of the French psychiatrists who started the revolution that changed the ancient (an cruel) view of the mental diseases, spent several hours at night observing how his patients behaved during sleep and concluded that their movements while asleep were related to their dreams, just as Aristotle had found long ago. Kluger J. During normal walking the tibialis anterior and the gastrocnemius muscles are mobilized in opposition but when they contract as part of a dream their contraction may be in opposition (in some periods), what happens in normal deambulatory movements, or simultaneous (in subsequent or preceding periods), which does not occur in normal deambulation. In 1986 Vertes advanced the hypothesis that random endogenous activation of the brain stem (dreaming?) Christy B, Nathans D. DNA binding site of the growth factor-inducible protein Zif268. "Insects are also creatures that do sleep, so much so that they can be seen resting with no movements whatsoever. Brain Res 1979;176:233-54. Ribeiro S, Goyal V, Mello CV, Pavlides C. Brain gene expression during REM sleep depends on prior waking experience. Baldissera F, Cesa-Bianchi MG, Mancia M. Phasic events indicating presynaptic inhibition of primary afferents to the spinal cord during desynchronized sleep. Much effort was devoted to searching for parallels between physiological aspects of REM sleep and characteristics of associated dreams, with modest results. Am J Physiol 1937;118:8-14. Marini G. Motor phenomena during sleep. We spend a lot of time sleeping. Vanni-Mercier and co-workers (1994) believe, however, that in cats eye movements during desynchronized sleep are in general asymmetric, that is, the eyes tend to move preferentially to one side of the visual field, what, according to these authors, disprove the hypothesis of the scanning character of eye movements during dreams (29). 117. Electrical stimulation of the nucleus reticularis pontis oralis evokes bilateral muscle atonia in decerebrate cats (52). 109. ", "As to the oviparous creatures, it is obvious that they sleep but it is impossible to state that they dream. Rerum Natura, I et II. Our hypothesis is that the cerebellum is involved in overall corrections of the components of all kinds of behavior, including sleep. Doricchi F, Violani C. Dream recall in brain-damaged patients: a contribution to the neuropsychology of dreaming through a review of the literature. The discovery of the close association between rapid eye movement (REM) sleep and dreaming and development of sleep laboratory techniques ushered in a new era in the study of dreams. 74. In sleep pathology there is a well-known syndrome, expressed as powerful movements during desynchronized sleep. It is interesting that the representation of animals in dreams of infants is quite conspicuous. Editor-translator: Gallop, D., Aris & Phillips Ltd., Warminster, England 1991. It is well known that the noise of an airplane usually does not awake people who live in the neighborhoods of airports but a light door creek may be enough to arouse them, as well as the groan produced by an infant child may arouse the parents, mainly the mother. Jouvet (12,119), one of the most important researchers on sleep, suggests that dreaming is "a guardian and programmer of the hereditary part of our personality" and as such it plays a role in our general behavior. Timo-Iaria C. Early research on dreaming. Nature 1989;304:111-4. Simes CA, Valle AC, Timo-Iaria C. Correlation between concomitant theta waves in nucleus reticularis pontis oralis and in the hippocampus, thalamus and neocortex during dreaming in rats. A correlation has been proposed between the development of desynchronized sleep in children and their waking cognitive maturation (24). Table 1 shows the results of some of such studies, including our data concerning nearly 2,000 dreaming episodes recorded from rats. sharing sensitive information, make sure youre on a federal J Abnorm Psychol 1982;91:433-6. 68. WebAs the foregoing discussion of rival theories of dream function suggests, there are many findings that contradict the idea that dreams have any kind of physiological or Another change of the electro-oscillograms we disclosed in rats by carefully analyzing their time-course while a dream is on (as well as during attentive wakefulness) is the presence of short periods of desynchronization that interrupt or superimpose on theta waves. Heart rate decreases down to nearly 150 bpm 1 or 2 seconds following the cessation of eye movements. Consciousness in waking and dreaming: the roles of neuronal oscillation and neuromodulation in determining similarities and differences. WebAbstract. Nikolaev E, Kaminska B, Tischmeyer W, Matthies E, Kaczmarek L. Induction of expression of genes encoding transcription factors in the rat brain elicited by behavioral training. An official website of the United States government. Such patterns mimic oniric eye movements, which may occur in functional coincidence or not with the visual scenes that are dreamed of. 103. Geschichte der Physiologie. Kubin L, Davies RO, Pack AI. Pontine cholinergic neurons show fos-like immunoreactivity associated with cholinergically induced REM sleep. Studi Psicologici e Clinici di un Alienista. In cats, during movements related to dreams such hyperpolarization is reinforced by presynaptic inhibition of afferents to motoneurons. During this bright period of the Middle Ages some physicians also reasoned about dreams. By comparing the program with the peripheral information, that tells it how the behavior is evolving, the cerebellum produces corrections, so that the execution can match the program. Neurology 1999;53:2193-5. MeSH Jouvet believes that dreaming activity plays a key role during the earliest years of life and thus may be involved in continuously programming some of the most subtle reactions of our consciousness during wakefulness. Usually r is very high between area 17 (visual cortex) and the hippocampus. In ancient Greece, Socrates, Plato and Aristotle discussed about the meaning of dreams, concluding that the prevailing mistic and mythic concepts about them were incorrect. It is not known why and how the potent inhibition of motoneurons is bypassed by the descending impulses that cause such movements but this is, possibly, a key phenomenon for the understanding of the mechanisms and the function of dreams. 78. The reason why when we dream we are walking we do not get out of the bed and really walk, or when we dream we are talking to someone we do not really talk, is that neural circuits located in the neighborhood of locus coeruleus, in the pontine tegmentum, inhibit the motoneurons and do not allow the real movements to occur. Rostrum movements in desynchronized sleep as a prevalent manifestation of dreaming activity in Wistar rats. Eye movements during dreaming are usually expressed as potentials of different voltages, which can be interpreted as due to distinct movements performed as a function of the movements of the dreamed of objects. Sharing sensitive information, make sure youre on a federal J Abnorm Psychol 1982 ; 91:433-6 reinterpretation dreams! Concerning nearly 2,000 dreaming episodes recorded from rats hypothesis that random endogenous activation of the neurophysiology of REM,! 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