“…Stimulation administered in most sensory modalities has demonstrated changes in at least some dreams. Such changes have been provoked by olfactory stimulation (Trotter, Dallas, & Verdone, 1988), auditory stimulation (e.g., Berger, 1963; Castaldo & Holzman, 1969; Castaldo & Shevrin, 1970; Hoelscher, Klinger & Barta, 1981; Strauch, 1988), visual stimulation (Dement & Wolpert, 1958; Rechtschaffen & Foulkes, 1965), vestibular stimulation (Woodward, Tauber, Spielman, & Thorpy, 1990), and a variety of somatosensory stimuli. The latter include applications to the skin of water (Dement & Wolpert, 1958; Foulkes & Shepherd, 1972; Foulkes, 1982), of trains of electrical pulses (Koulack, 1969) and of cotton swabs (Foulkes, 1982), passive displacements of trunk (Baldridge 1966), and limb muscles (Foulkes & Shepherd, 1972; Foulkes, 1982), and thermal stimulation (Baldridge, 1966).…”