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See also:DREAM (from a See also:root dreug, connected with Germ. trugen, to deceive)
, the See also:state of consciousness during See also:sleep; it may also be defined as a See also:hallucination or illusion peculiarly associated with the See also:condition of sleep, but not necessarily confined to that state
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In sleep the withdrawal of the mind from the See also:external
See also:world is more See also:complete and the objectivity of the See also:dream images is usually unquestioned, whereas in the waking state the hallucination is usually recognized as such; we may, however, be conscious that we are dreaming, and thus in a measure be aware of the hallucinatory See also:character of our percepts
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The physiological nature of sleep (q.v.; see also MUSCLE AND See also:NERVE) and of dreaming is obscure
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As a See also:rule the See also:control over the voluntary muscles in dreams is slight; the sleep-See also:
Relations of Dreaming and Sleep.—It has been maintained by See also: Presentative Dreams.—The dreams due to real sensations, more or less metamorphosed, may arise (a) from the states of the See also:internal organs, (b) from See also:muscular states, (c) from subjective sensations due to the circulation, &c., or (d) from the ordinary cause of the See also:action of external stimuli on the organs of sense . (a) The state of the See also:stomach,See also:heart, &c., haslongbeenrecognized as important in the See also:causation of dreams (see below, Classical Views) . The common sensation of flying seems to be due in many cases to the disturbance of these organs setting up sensations resembling those See also:felt in rapidly ascending or descending, as in a See also:swing or a lift . Indigestion is a frequent cause of nightmare—the See also:term given to oppressive and horrible dreams—and bodily discomfort is sometimes translated into the moral region, giving rise to the dream that a See also:murder has been committed . (b) Dreams of flying, &c., have also been attributed to the condition of the muscles during sleep; W . See also:Wundt remarks that the movements of the See also:body, such as breathing, extensions of the limbs and so on, must give rise to dream fancies; the awkward position of the limbs may also excite images . (c) Especially important, probably, for the dreams of the See also:early See also:part of the See also:night are the retinal conditions to which are due the illusions hypnagogiques of the preliminary drowsy stage; but probably See also:Ladd goes too far in maintaining that entoptic stimuli, either. See also:intra- or extra-organic in origin, condition all dreams . Illusions hypnagogiques, termed popularly " faces in the dark," of which Maury has given a full See also:account, are the not uncommon sensations experienced, usually visual and seen with both open and closed eyes, in the See also:interval between retiring to See also:rest and actually falling asleep; they are comparable to the crystal-gazing visions of waking moments; though mainly visual they may also affect other senses . Besides the See also:eye the See also:ear may See also:supply material for dreams, when the circulation of the See also:blood suggests rushing See also:waters or similar ideas . (d) It is a See also:matter of common observation that the temperature of the See also:surface of the body determines in many cases the character of the dreams, the real circumstances, as might be expected from the See also:general character of the dream state, being exaggerated . In the same way the pressure of See also:bed-clothes, obstruction of the supply of See also:air, &c., may serve as the starting-point of dreams . The common dream of being unclothed may perhaps be due to this cause, the sensations associated with clothing being absent or so far modified as to be unrecognizable . In the same way the absence of See also:foot-See also:gear may account for some dreams of flying . It is possible to test the See also:influence of external stimuli by See also:direct experiment; Maury made a number of trials with the aid of an assistant . Rapidity of Dreams.—It has often been asserted that we dream with extreme rapidity; but this statement is by no means See also:borne out by experiment . In a trial recorded by J . Claviere the beginning of the dream was accurately fixed by the See also:sounding of an alarm See also:clock, which rang, then was silent for 22 seconds, and then began to See also:ring continuously; the dream See also:scene was in a See also:theatre, and he found by actual trial that the See also:time required in ordinary life for the performance of the scenes during the interval of silence was about the same as in ordinary life . Spontaneous dreams seem to show a different state of things; it must be remembered that (r) dreams are commonly a See also:succession of images, the number of which cannot be legitimately compared with the number of extra-organic stimuli which would correspond to them in ordinary life; the real comparison is with mental images; and (2) the rapidity of association varies enormously in ordinary waking life . No proof, therefore, that some dreams are slow can show that this mentation in others is not extremely rapid . The most commonly quoted case is one of Maury's; a bed-See also:pole See also:fell on his See also:neck, and (so it is stated) he dreamt of the See also:French Revolution, the scenes culminating in the fall of the See also:guillotine on his neck; this has been held to show that (r) dreams are extremely rapid; and (2) we construct a dream See also:story leading up to the external stimulus which is assumed to have originated the dream . But Maury's dream was not recorded till many years after it had occurred; there is nothing to show that the dream, in this as in other similar cases, was not in progress when the bed-pole fell, which thus by See also:mere coincidence would have intervened at the psychological moment; Maury's memory on waking may have been to some extent hallucinatory . But there are records of waking states, not necessarily abnormal, in which time-See also:perception is disturbed and brief incidents seem interminably long; on the other hand, it appears from the experiences of persons recovered from drowning that there is See also:great rapidity of ideation before the extinction of consciousness; the same rapidity of thought has been observed in a fall from a See also:bicycle . See also:Reason in Dreams.—Studies of dreams of normal individuals based on large collections of instances are singularly few in number; such as there are indicate great See also:variations in the source of dream thoughts and images, in the coherence of the dream, and in the powers of memory . In ordinary life attention dominates the images presented; in dreams heterogeneous and disconnected elements are often combined; a resemblance need not even have been consciously recognized for the mind to combine two impressions in a dream; for example, an aching tooth may (according to the dream) be extracted, and found to resemble rocks on the See also:sea-See also:shore, which had not struck the waking mind as in any way like See also:teeth . Incongruence and incoherence are not, however, a necessary characteristic of dreams, and individuals are found whose dream ideas and scenes show a See also:power of reasoning and orderliness equal to that of a scene imagined or experienced in ordinary life . In some cases the reasoning power may attain a higher level than that of the ordinary conscious life . In a well-authenticated case See also:Professor Hilprecht was able in a dream to solve a difficulty connected with two Babylonian See also:inscriptions, which had not previously been recognized as complementary to each other; a point of See also:peculiar See also:interest is the dramatic form in which the See also:information came to him—an old Babylonian See also:priest appeared in his dream and gave him the See also:clue to the problem (see also below, See also:Personality) . Memory in Dreams.—Although prima facie the dream memory is fragmentary and far less complete than the waking memory, it is by no means uncommon to find a revival in sleep of early, apparently quite forgotten, experiences: more striking is the recollection in dreams of matters never supraliminally (see SUBLIMINAL SELF) apperceived at all . The relation between the memory in dreams and in the hypnotic See also:trance is curious: suggestions given in the trance may be accepted and then forgotten or never remembered in ordinary life; this does not prevent them from reappearing occasionally in dreams; conversely dreams forgotten in ordinary life may be remembered in the hypnotic trance . These dream memories of other states of consciousness suggest that dreams are some-times the product of a deeper stratum of the personality than comes into See also:play in ordinary waking life . It must be remembered in this connexion that we See also:judge of our dream consciousness by our waking recollections, not directly, and our recollection of our dreams is extraordinarily fragmentary; we do not know how far our dream memory really extends . Connected with memory of other states is the question of memory in dreams of previous dream states; occasionally a See also:separate See also:chain of memory, analogous to a secondary personality, seems to be formed . We may be also conscious that we have been dreaming, and subsequently, without intermediate waking, relate as a dream the dream previously experienced . In spite of the irrationality of dreams in general, it by no means follows that the earlier and later portions of a dream do not cohere; we may interpolate an See also:episode and again take up the first See also:motive, exactly as happens in real life . The strength of the dream memory is shown by the recurrence of images in dreams; a picture, the See also:page of a book, or other image may be reproduced before our eyes several timesin the course of a dream without the slightest alteration, although the waking consciousness would be quite incapable of such a feat of visualizing . In this connexion may be mentioned the phenomenon of redreaming; the same dream may recur either on the same or on different nights; this seems to be in many cases pathological or due to drugs, but may also occur under normal conditions . Personality.—As a rule the personality of the dreamer is unchanged; but it also happens that the confusion of identity observed with regard to other objects embraces the dreamer himself; he imagines himself to be some one else; he is alternately actor and observer; he may see himself playing a part or may divest himself of his body and wander incorporeally . Ordinary dreams, however, do not go beyond a splitting of personality; we hold conversations, and are intensely surprised at the utterances of a dream figure, which, however, is merely an alter ego . As in the case of Hilprecht (see above) the information given by another part of the personality may not only appear but actually be novel . Supernormal Dreams.—In addition to dreams in which there is a revival of memory or a rise into consciousness of facts previously only subliminally cognized, a certain number of dreams are on See also:record in which See also:telepathy (q.v.) seems to play a part; much of the See also:evidence is, however, discounted by the possibility of hallucinatory memory . Another class of dreams (prodromic) is that in which the abnormal bodily states of the dreamer are brought to his knowledge in sleep, sometimes in a symbolical form; thus a dream of See also:battle or sanguinary conflict may presage a See also:haemorrhage . The increased power of See also:suggestion which is the normal See also:accompaniment of the hypnotic trance may make its See also:appearance in dreams, and exercise either a curative influence or See also:act capriciously in producing See also:hysteria and the tropic changes known as " stigmata." We may meet with various forms of hyperaesthesia in dreams; quite apart from the recovery of sight by those who have lost it wholly or in part (see below, Dreams of the See also:Blind), we find that the powers of the senses may undergo an intensification, and, e.g., the power of appreciating See also:music be enormously enhanced in persons usually indifferent to it . Mention must also be made of the experience of R . L . See also:Stevenson, who tells in Across the Plains how by self-suggestion he was able to secure from his dreams the motives of some of his best romances . Voluntary Action in Dreams.—Connected with dreams voluntarily influenced is the question of how far dreams once initiated are modifiable at the will of the dreamer . Some few observers, like F . W . H . See also:Myers and Dr F. See also:van Eeden, record that they can at longer or shorter intervals control their actions in their dreams, though usually to a less extent than their imagined actions in waking life . Dr van Eeden, for example, tells us that he has what he calls a " clear dream " once a See also:month and is able to predetermine what he will do when he becomes aware that he is dreaming . Dreams of See also:Children.—Opinions differ widely as to the See also:age at which children begin to dream; G . See also:Compayre maintains that dreaming has been observed in the See also:fourth month, but reflex action is always a possible explanation of the observed facts . S. de See also:Sanctis found that in boys of eleven only one out of eight said that he dreamt seldom, as against four out of seven at the age of six; but we cannot exclude the possibility that dreams were frequent but forgotten . If correct, the observation suggests that dreams appear comparatively See also:late . Individual cases of dreaming, or possibly of waking hallucination, are known as early as the age of two and a See also:half years; according to de Sanctis dreams occur before the fifth See also:year, but are seldom remembered; as a rule the conscious dream age begins with the fourth year; speech or See also:movement, however, in earlier years, though they may be attributed to reflex action, are more probably due to dreams . Dreams of the Old.—In normal individuals above the age of sixty-five de Sanctis found dreams were rare; atmospheric influences seem to be important elements in causing them; memory of them is weak; they are emotionally poor, and See also:deal with long past scenes . ' Dreams of Adults.—Any See also:attempt to record or influence our dreams may be complicated by (a) direct suggestion, leading to the See also:production of the phenomena for which we are looking, and (b) indirect suggestion leading to the more lively recollection of dreams in general and of certain dreams in particular . Consequently it cannot be assumed that the facts thus ascertained represent the normal conditions . According to F . Heerwagen's See also:statistics See also:women sleep more lightly and dream more than men; the frequency of dreams is proportional to their vividness; women who dream sleep longer than those who do not; dreams tend to become less frequent with advancing age . The See also:total number of remembered dreams varies considerably with different observers, some attaining an See also:average of ten per night . The senses mainly active in dreams are, according to one set of experiments, See also:vision in 6o %, See also:hearing in 5 %, See also:taste in 3 %, and See also:smell in 1.5%, where the dreamers had looked at coloured papers before falling asleep; when taste or smell had been stimulated, the visual dreams fell to about 50%, and the sense stimulated was active twice as often as it would otherwise be; dreams in which See also:motion was a prominent feature were ro% of the former class, 14% and 18% of the two latter . Experiments by J . Mourly Vold show even more distinctly the influence of suggestion both as to the form, visual or otherwise, and the content (See also:colours and forms of objects) of dreams . According to most observers dreams are most vivid and frequent between the ages of 20 and 25, but H . Maudsley puts the maximum between 30 and 35 . De Sanctis got replies from 165 men and 55 women: the proportion between the sexes closely agrees with the results attained by Heerwagen and M . W . Calkins; 13% of men and 33% of women said they always dreamt, 27% and 45% often, 50% and 13% rarely, and the See also:remainder (precisely the same percentage for men and women—9.o9) either did not dream or did not remember that they dreamt . Nearly twice as many women as men had vivid dreams; in the matter of complication of the dream experiences the sexes are about equal; daily life supplies more material in the dreams of men; nearly twice as many women as men remember their dreams clearly, a fact which hangs together to some extent with the vividness of the dreams, though it by no means follows that a vivid dream is well remembered . There are great variations in the emotional character of dreams; some observers See also:report twice as many unpleasant dreams as the See also:reverse; in other cases the emotions seem to be absent; others again have none but pleasing dreams . Individual experience also varies very largely as to the time when most dreams are experienced; in some cases the great See also:majority are subsequent to 6.3o A.M.; others find that quite half occur before 4.0 A.M . Dreams of the Neuropathic, Insane, Idiots, &c.—Much attention has been given to the dreams of hysterical subjects . It appears that their dreams are specially liable to exercise an influence over their waking life, perhaps because they do not distinguish them, any more than their waking hallucinations, from reality . P . See also:Janet maintains that the cause of hysteria may be sought in a dream . The dreams of the hysterical have a tendency to recur . Epileptic subjects dream less than the hysterical, and their dreams are seldom of a terrifying nature; certain dreams seem to take the place of an epileptic attack . Dreaming seems to be rare in idiots . De Sanctis divides paranoiacs into three classes: (a) those with systematized delusions, (b) those with frequent hallucinations, and (c) degenerates; the dreams of the first class resemble their delusions; the second class is distinguished by the complexity of its dreams; the third by their vividness, by their delusions of megalomania, and by their influence on daily life . Alcoholic subjects have vivid and terrifying dreams, characterized by the frequent appearance of animals in them, and delirium tremens may originate during sleep . Dreams of the Blind, See also:Deaf, &c.—As regards visual dreams the blind fall into three classes—(r) those who are blind from See also:birth or become blind before the age of five; (2) those who become blind at the " See also:critical age " from five to seven; (3) those who become blind after the age of seven . The dreams of the first class are non-visual; but in the dreams of See also:Helen See also:Keller there are traces ofa visual content; the second class sometimes has visual dreams; the third class does not differ from normal persons, though visual dreams may fade away after many years of See also:blindness . In the case of the partially blind the clearness of vision in a dream exceeds that of normal life when the partial loss of sight occurred in the See also:sixth or later years . The See also:education of Helen Keller is interesting from another point of view; after losing the senses of sight and hearing in See also:infancy she began her education at seven years and was able to articulate at eleven; it is recorded that she " talked " in her dreams soon after . This accords with the experience of normal individuals who acquire a See also:foreign See also:language . Her extraordinary memory enables her to recall faintly some traces of the sunlit See also:period of her life, but they hardly affect her dreams, so far as can be judged . The dreams of the blind, according to the records of F . Hitsthmann, present some peculiarities; animals as well as man speak; toothache and bodily pains are perceived as such; impersonal dreaming, taking the form of a See also:drama or See also:reading aloud, is found; and he had a strong tendency to reproduce or create See also:verse . Dreams of Animals.—We are naturally reduced to inference in dealing with animals as with very See also:young children; but various observations seem to show that dreams are common in older See also:dogs, especially after See also:hunting expeditions; in young dogs sleep seems to be quieter; dogs accustomed to the See also:chase seem to dream more than other kinds . Dreams among the Non-See also:European Peoples.—In the See also:lower stages of culture the dream is regarded as no less real and its personages as no less See also:objective than those of the ordinary waking life; this is due in the See also:main to the See also:habit of mind of such peoples (see See also:ANIMISM), but possibly in some measure also to the occurrence of veridical dreams (see TELEPATHY) . In either case the See also:savage explanation is animistic, and animism is commonly assumed to have been See also:developed very largely as a result of theorising dreams . Two explanations of a dream are found among the lower races: (1) that the soul of the dreamer goes out, and visits his See also:friends, living or dead, his old haunts or unfamiliar scenes and so on; or (2) that the souls of the dead and others come to visit him, either of their own motion or at divine command . In either of the latter cases or at a higher stage of culture when the dream is regarded as See also:god-sent, though no longer explained in terms of animism, it is often regarded as oracular (see See also:ORACLE), the explanation being sometimes symbolical, sometimes See also:simple . There are two classes of dreams which have a See also:special importance in the lower cultures: (r) the dream or vision of the See also:initiation fast; and (2) the dream caused by the process known as See also:incubation, which is often analogous to the initiation fast . In many parts of See also:North See also:America the individual See also:Indian acquires a tutelary spirit, known as manito or nagual, by his initiation dream or vision; the idea being perhaps that the spirit by the act of appearing shows its subjection to the will of the man . Similarly, the magician acquires his See also:familiar in North America, See also:Australia and elsewhere by dreaming of an See also:animal . Incubation consists in retiring to sleep in a See also:temple, sometimes on the See also:top of a See also:mountain or other unusual spot, in See also:order to obtain a See also:revelation through a dream . See also:Fasting, continence and other observances are frequently prescribed as preliminaries . Certain classes of dreams have, especially in the See also:middle ages, been attributed to the influence of evil See also:spirits (see See also:DEMONOLOGY) . Classical and See also:Medieval Views of Dreams.—See also:Side by side with the prevalent animistic view of dreams we find in antiquity and among the semi-civilized attempts at philosophical or physiological explanations of dreams . See also:Democritus, from whom the Epicureans derived their theory, held the cause of them to be the simulacra or phantasms of corporeal objects which are constantly floating about the See also:atmosphere and attack the soul in sleep—a view hardly distinguishable from animism . See also:Aristotle, however, refers them to the impressions See also:left by objects seen with the eyes of the body; he further remarks on the exaggeration of slight stimuli when they are incorporated into a dream; a small See also:sound becomes a See also:noise like See also:thunder . See also:Plato, too, connects dreaming with the normal waking operations of the mind; See also:Pliny, on the other hand, admits this only for dreams which take place after meals, the remainder being supernatural . See also:Cicero, however, takes the view that they are simply natural occurrences no more and no less than the mental operations and sensations of the waking state . The pathological side of dreams attracted the See also:notice of physicians . See also:Hippocrates was disposed to ad.nit that some dreams might be divine, but held that others were premonitory of diseased states of the body . See also:Galen took the same view in some of his speculations . Symbolical interpretations are combined with pathological no less than animistic interpretations of dreams; they are also extremely common among the lower classes in See also:Europe at the present day, but in this case no consistent explanation of their importance for the See also:divination of future events is usually discoverable . Among the Greeks Plato in the See also:Timaeus (ch. xlvi., xlvii.) explains dreams as prophetic visions received by the lower appetitive soul through the See also:liver; their See also:interpretation requires intelligence . The See also:Stoics seem to have held that dreams may be a divine revelation; and more than one See also:volume on the interpretation of dreams has come down to us, the most important being perhaps the 'Ovecpoxpirtxa of Daldianus See also:Artemidorus . We find See also:parallels to this in a Mussulman See also:work by Gabdorrachaman, translated by See also:Pierre Vattier under the name of Onirocrite mussulman, and in the numerous books on the interpretation of dreams which circulate at the present day . In See also:Siam dream books are found (Intern . Archiv See also:fur Anthr. viii . 150); one of the functions of the Australian See also:medicine man is to decide how a dream is to be interpreted . Modern Views.—The See also:doctrine of See also:Descartes that existence depended upon thought naturally led his followers to maintain that the mind is always thinking and consequently that dreaming is continuous . See also:Locke replied to this that men are not always conscious of dreaming, and it is hard to be conceived that the soul of the sleeping man should this moment be thinking, while the soul of the waking man cannot recollect in the next moment a jot of all those thoughts . That we always dream was maintained by See also:Leibnitz, See also:Kant, See also:Sir W . Hamilton and others; the latter refutes the See also:argument of Locke by the just observation that the somnambulist has certainly been conscious, but fails to recall the fact when he returns to the normal state .
It has been commonly held by metaphysicians that the nature of dreams is explained by the suspension of volition during sleep; Dugald See also: W . H . Myers, Human Personality, vol. i., and Proc . S.P.R. viii . 362 . For voluntary dreams see Proc . S.P.R. iv . 241, xvii . 112 . On prophetic dreams see Monist, xi . 161; See also:Bull . See also:Soc . Anth . (See also:Paris, 1901), 196, (1902), 228; Rev. de synthese historique (1901), 151, &c . On incubation see Deubner, De incubatione; Maury, La Magie . On the dreams of See also:American See also:Indians see Handbook of American Indians (See also:Washington, 1907), s.v . " Dreams " and " Manito." On the interpretation of dreams see Freud, Die Traumdeutung . Other works are F . See also:Greenwood, See also:Imagination in Dreams; See also:Hutchinson, Dreams and their Meanings . (N . W . |
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