Miscellaneous Psychological Theories of Sleep-Utterance
A variety of conceptualizations and commentary as to the nature of sleeptalking are to be found mostly in diffuse and dispersed fragments in the clinical-anecdotal literature. Many of them are quite cogent. They are couched in a range of perspectives including the more or less psychological, psychophysiological, and neurological. The psychoanalytic literature was large enough to warrant a separate chapter; and I devote a separate chapter as well to my own views on the subject, and those of other researchers who have worked with modern electrographic methods, in Chapter 17. Here we are concerned only with the less well-known clinicians and observers.
The theory most widely held is that sleep-speech is the outcome of localized threshold activation of cerebral speech centers occuring against a background of generalized cerebral inhibition, which maintains behavioral sleep. One group of observers holds that such localized threshold activation occurs during a dream ( Andriani, 1892); Cameron, 1952; Carpenter, 1849; Elder, 1927; Jung, 1957; Lipps, 1909; MacNish, 1838; Moreau, 1820; Pinkerton, 1839; Symonds, 1851; Walsh, 1920a,b; Winterstein, 1953), whereas a second group believes that this process occurs independently of dreaming ( Ellis, 1926; Goecker, 1935; Pötzl, 1929a,b; Salmon, 1910; Trömner, 1911a,b).
Andriani ( 1892) is a leading exponent of the former viewpoint, and his ideas are worth quoting extensively, not only for their intrinsic interest, but because his paper, one of the few dealing exclusively with somniloquy, was