‘I love you’: the first phrase detected from dreams

Objective Many people have dreams nightly and some maintain consciousness during dreams. Such dreams are referred to as lucid dreams (LD). During dreams, our speech correlates with facial muscle activity, which is hard to decode, but LD could solve this problem. The primary hypothesis of this study was that the facial muscles electric activity during LD corresponds to specific sounds. Understanding this connection could help decode dream speech in the future.

Material and Methods Under laboratory conditions, four LD practitioners were asked to say “I love you”, a phrase with a distinctive electromyographic (EMG) signature. They did this before falling asleep and then again after becoming conscious during a dream. Their facial and neck EMG was recorded in four areas.

Results All four volunteers accomplished the goal at least once. The patterns associated with the “I love you” phrase were observed in most cases, both during wakefulness and LD. Specifically, the “I” triggered distinctive phasic activity in the submentalis area most of the time, while “you” did the same in the orbicularis oris.

Discussion This study highlights the possibility of detecting only specific and highly EMG distinctive phrases from dreams because vocalization also involves a tong and vocal apparatus. The most interesting consequence of the present results is that they indicate the possibility of creating an artificial EMG language that could be instantly decoded in reality and used during LD.

Dreams - Lucid Dreaming - Language - Sleep - REM - Vocalization - Consciousness

Publication History

Received: 25 June 2021

Accepted: 13 October 2021

Article published online:
01 December 2023

• REFERENCES

• 1 Nielsen T. Variations in dream recall frequency and dream theme diversity by age and sex. Front Neurol. 2012;3:106. DOI: https://doi. org/10.3389/fneur.2012.00106
• 2 Funkhouser AT, Hirsbrunner HP, Cornu C, Bahro M. Dreams and dreaming among the elderly: an overview. Aging Ment Heal. 1999;3(1):10-20. DOI: https://doi.org/10.1080/13607869956398
• 3 Schredl M. Home dream recall in children and young adults. Int J Dream Res. 2009;2(2):58-9. DOI: https://doi.org/10.11588/ijodr.2009.2.401
• 4 Zanasi M, Persis S, Caporali M, Siracusano A. Dreams and age. Percept Mot Skills. 2005 Jun;100(Suppl 3):925-38. DOI: https://doi. org/10.2466/pms.100.3c.925-938
• 5 Herman S, Shows WD. How often do adults recall their dreams? Int J Aging Hum Dev. 1984;18(4):243-54. DOI: https://doi.org/10.2190/ A3R8-C69H-13X5-P5V0
• 6 Guénole F, Marcaggi G, Baleyte JM, Garma L. Dreams in normal and pathological aging. Psychol Neuropsychiatr Vieil. 2010 Jun;8(2):87-96.
• 7 Schredl M. Factors influencing the gender difference in dream recall frequency. Imagin Cogn Pers. 2002;22(1):33-9. DOI: https://doi. org/10.2190/jr55-wyc2-1gc0-023d
• 8 Schredl M. Explaining the gender difference in dream recall Frequency. Dreaming. 2010;20(2):96-106. DOI: https://doi.org/10.1037/a0019392
• 9 Schredl M. Dream recall frequency and sleep quality of patients with restless legs syndrome. Eur J Neurol. 2008 Jul;8(2):185-9. DOI: https:// doi.org/10.1046/j.1468-1331.2001.00203.x
• 10 Eichenlaub JB, Nicolas A, Daltrozzo J, Redouté J, Costes N, Ruby P. Resting brain activity varies with dream recall frequency between subjects. Neuropsychopharmacology. 2014 Jan;39:1594-602. DOI: https://doi.org/10.1038/npp.2014.6
• 11 Vallat R, Eichenlaub JB, Nicolas A, Ruby P. Dream recall frequency is associated with medial prefrontal cortex white-matter density. Front Psychol. 2018;9:1856. DOI: https://doi.org/10.3389/fpsyg.2018.01856
• 12 Brand S, Beck J, Kalak N, Gerber M, Kirov R, Pühse U, et al. Dream recall and its relationship to sleep, perceived stress, and creativity among adolescents. J Adolesc Health. 2011 Nov;49(5):525-31. DOI: https:// doi.org/10.1016/j.jadohealth.2011.04.004
• 13 Ribeiro N, Gounden Y, Quaglino V. Is there a link between frequency of dreams, lucid dreams, and subjective sleep quality?. Front Psychol. 2020 May;11:1290. DOI: https://doi.org/10.3389/fpsyg.2020.01290
• 14 Chellappa SL, Münch M, Blatter K, Knoblauch V, Cajochen C. Does the circadian modulation of dream recall modify with age?. Sleep. 2009 Sep;32(9):1201-9. DOI: https://doi.org/10.1093/sleep/32.9.1201
• 15 Schwitzgebel E. Why did we think we dreamed in black and white?. Stud Hist Philos Sci Pt A. 2002 Dec;33(4):649-60. DOI: https://doi. org/10.1016/S0039-3681(02)00033-X
• 16 Solms M. Dreaming is not controlled by hippocampal mechanisms. Behav Brain Sci. 2013;36(6):629. DOI: https://doi.org/10.1017/ S0140525X1300143X
• 17 Nir Y, Tononi G. Dreaming and the brain: from phenomenology to neurophysiology. Trends Cogn Sci. 2010 Feb;14(2):88-100. DOI: https://doi.org/10.1016/j.tics.2009.12.001
• 18 Ruby PM. Experimental research on dreaming: State of the art and neuropsychoanalytic perspectives. Front Psychol. 2011 Nov;2:286. DOI: https://doi.org/10.3389/fpsyg.2011.00286
• 19 Montangero J. Dreaming and REM sleep: history of a scientific denial whose disappearance entailed a reconciliation of the neuroscience and the cognitive psychological approaches to dreaming. Int J Dream Res. 2018;11(1):30-45. DOI: https://doi.org/10.11588/ijodr.2018.1.42384
• 20 Scarpelli S, D’Atri A, Bartolacci C, Gorgoni M, Mangiaruga A, Ferrara M, et al. Dream recall upon awakening from non-rapid eye movement sleep in older adults: electrophysiological pattern and qualitative features. Brain Sci. 2020 Jun;10(6):343. DOI: https://doi.org/10.3390/ brainsci10060343
• 21 Cavallero C, Cicogna P, Natale V, Occhionero M, Zito A. Slow wave sleep dreaming. Sleep. 1992 Nov;15(6):562-6. DOI: https://doi.org/10.1093/ sleep/15.6.562
• 22 Siclari F, Bernardi G, Cataldi J, Tononi G. Dreaming in NREM sleep: a high - density EEG study of slow waves and spindles. J Neurosci. 2018 Oct;38(43):9175-85. DOI: https://doi.org/10.1523/ JNEUROSCI.0855-18.2018
• 23 Carr M, Solomonova E. Dream recall and content in different stages. In: Valli K, Hoss R, eds. Dreams: biology, psychology and culture. Santa Barbara: Greenwood Publishing Group; 2019.
• 24 Roffwarg HP, Dement WC, Muzio JN, Fisher C. Dream imagery: relationship to rapid eye movements of sleep. Arch Gen Psychiatry. 1962 Oct;7(4):235-58. DOI: https://doi.org/10.1001/ archpsyc.1962.01720040001001
• 25 Herman JH, Erman M, Boys T, Peiser L, Taylor ME, Roffwarg HP. Evidence for a directional correspondence between eye movements and dream imagery in REM sleep. Sleep. 1984 Sep;7(1):52-63. DOI: https://doi.org/10.1093/sleep/7.1.52
• 26 Aserinsky E, Kleitman N. Regularly occurring periods of eye motility, and concomitant phenomena, during sleep. Science. 1953;118(3052):273-4. DOI: https://doi.org/10.1126/science.118.3062.273
• 27 Jouvet M. Recherches sur les structures nerveuses et les mécanismes responsables des différentes phases du sommeil physiologique. Arch Ital Biol. 1962;100:125-206.
• 28 Horikawa T, Tamaki M, Miyawaki Y, Kamitani Y. Neural decoding of visual imagery during sleep. Science. 2013 Apr;340(6132):639-42. DOI: https://doi.org/10.1126/science.1234330
• 29 Nishimoto S, Vu AT, Naselaris T, Benjamini Y, Yu B, Gallant JL. Reconstructing visual experiences from brain activity evoked by natural movies. Curr Biol. 2011 Oct;21(9):1641-6. DOI: https://doi. org/10.1016/j.cub.2011.08.031
• 30 McGuigan FJ, Tanner RG. Covert oral behavior during conversational and visual dreams. Psychon Sci. 1971;23(4):263-4.
• 31 Shimizu A, Inoue T. Dreamed speech and speech muscle activity. Psychophysiology. 1986 Mar;23(2):210-4. DOI: https://doi. org/10.1111/j.1469-8986.1986.tb00620.x
• 32 Oldis D. Animating dreams and future dream recording [panel]. In: 34th Annual Conference of the International Association for the Study of Dreams (IASD). 2017 Jun 16-20; Anaheim, California, US. Anaheim, CA: IASD; 2017.
• 33 LaBerge SP, Nagel LE, Dement WC, Zarcone Junior VP. Lucid dreaming verified by volitional communication during REM sleep. Percept Mot Skills. 1981 Jun;52(3):727-32. DOI: https://doi.org/10.2466/ pms.1981.52.3.727
• 34 LaBerge S. Lucid dreaming: the power of being awake and aware in your dreams. Los Angeles: Tarcher; 1985.
• 35 Dane JH, Van De Castle RL. A comparison of waking instruction and posthypnotic suggestion for lucid dream induction. Lucidity Lett [Internet]. 1984 Dec; [cited 2021 June 01]; 3(4):1-7. Available from: https://journals.macewan.ca/lucidity/article/view/636/550
• 36 Mota-Rolim SA, Brandão DS, Andrade KC, Queiroz CMT, Araujo JF, Araujo DB, et al. Neurophysiological features of lucid dreaming during N1 and N2 sleep stages: two case reports. Sleep Sci. 2015 Dec;8(4):215. DOI: https://doi.org/10.1016/j.slsci.2016.02.093
• 37 Stumbrys T, Erlacher D. Lucid dreaming during NREM sleep: two case reports. Int J Dream Res. 2021;5(2):151-5. DOI: https://doi. org/10.11588/ijodr.2012.2.9483
• 38 LaBerge S, LaMarca K, Baird B. Pre-sleep treatment with galantamine stimulates lucid dreaming: a double-blind, placebo-controlled, crossover study. PLoS One. 2018;13(8):e0201246. DOI: https://doi. org/10.1371/journal.pone.0201246
• 39 Singh A, Gupta D. Can acetylcholine make you dream?. Sleep Sci. 2019;12(3):240. DOI: https://doi.org/10.5935/1984-0063.20190096
• 40 Van Eeden F. A study of dreams. Proc Soc Psych Res [Internet]. 1913; [cited 2021 June 01]; 26:1-12. Available from: http://www.dreamscience. ca/en/documents/New%20content/lucid%20dreaming%20pdfs/ vanEeden_PSPR_26_1-12_1913.pdf
• 41 Hearne KMT. Lucid dreams: an elecro-physiological and psychological study [thesis]. Liverpool: University of Liverpool; 1978.
• 42 Zadra AL, Pihl RO. Lucid dreaming as a treatment for recurrent nightmares. Psychother Psychosom. 1997;66(1):50-5. DOI: https:// doi.org/10.1159/000289106
• 43 Macedo TCF, Ferreira GH, Almondes KM, Kirov R, Mota-Rolim SA. My dream, my rules: can lucid dreaming treat nightmares?. Front Psychol. 2019;10:2618. DOI: https://doi.org/10.3389/fpsyg.2019.02618
• 44 Zappaterra M, Jim L, Pangarkar S. Chronic pain resolution after a lucid dream: a case for neural plasticity?. Med Hypotheses. 2014 Mar;82(3):286-90. DOI: https://doi.org/10.1016/j.mehy.2013.12.011
• 45 Stumbrys T, Erlacher D, Schmidt S. Lucid dream mathematics: an explorative online study of arithmetic abilities of dream characters. Int J Dream Res. 2011;4(1):35-40. DOI: https://doi.org/10.11588/ ijodr.2011.1.9079
• 46 Schmidt SCE, Stumbrys T, Erlacher D. Dream characters and the dream ego: an exploratory online study in lucid dreams. Dreaming. 2014;24(2):138-51. DOI: https://doi.org/10.1037/a0036942
• 47 Mallett R. A pilot investigation into brain-computer interface use during a lucid dream. Int J Dream Res. 2020;13(1):62-9. DOI: https:// doi.org/10.11588/ijodr.2020.1.68010
• 48 Stumbrys T, Erlacher D, Schredl M. Effectiveness of motor practice in lucid dreams: a comparison with physical and mental practice. J Sports Sci. 2016;34(1):27-34. DOI: https://doi.org/10.1080/02640414.2015.1030342
• 49 Saunders DT, Roe CA, Smith G, Clegg H. Lucid dreaming incidence: a quality effects meta-analysis of 50 years of research. Conscious Cogn. 2016 Jul;43:197-215. DOI: https://doi.org/10.1016/j. concog.2016.06.002
• 50 Terzaghi M, Ratti PL, Manni F, Manni R. Sleep paralysis in narcolepsy: more than just a motor dissociative phenomenon? Neurol Sci. 2012;33(1):169-7. DOI: https://doi.org/10.1007/s10072-011-0644-y
• 51 Hishikawa Y, Shimizu T. Physiology of REM sleep, cataplexy, and sleep paralysis. Adv Neurol [Internet]. 1995 Feb; [cited 2021 June 01]; 67:245-71. Available from: https://www.researchgate.net/ publication/14356396_Physiology_of_REM_sleep_cataplexy_and_ sleep_paralysis
• 52 Barrett D. Flying dreams and lucidity: an empirical study of their relationship. Dreaming. 1991;1(2):129-34. DOI: https://doi. org/10.1037/h0094325
• 53 Levitan L, LaBerge S, DeGracia DJ, Zimbardo P. Out-of-body experiences, dreams, and REM sleep. Sleep Hypn [Internet]. 1999; [cited 2021 June 01]; 1(3):186-96. Available from: https://www.researchgate. net/publication/281080488_Out-of-body_experiences_dreams_and_ REM_sleep
• 54 Schenck CH, Mahowald MW. Rapid eye movement sleep parasomnias. Neurol Clin. 2005 Nov;23(4):1107-26. DOI: https://doi.org/10.1016/j. ncl.2005.06.002
• 55 Raduga M. The phase: shattering the illusion of reality. Scotts Valley: Createspace Independent Publishing Platform; 2014.
• 56 Raduga M. Bne mena [out-of-body]. Moscow: Sputnik; 2004.
• 57 Mahowald MW, Schenck CH. Insights from studying human sleep disorders. Nature. 2005 Oct;437(7063):1279-85. DOI: https://doi. org/10.1038/nature04287
• 58 Raduga M, Kuyava O, Sevcenko N. Is there a relation among REM sleep dissociated phenomena, like lucid dreaming, sleep paralysis, outof- body experiences, and false awakening? Med Hypotheses. 2020 Nov;144:110169. DOI: https://doi.org/10.1016/j.mehy.2020.110169
• 59 Konkoly K, Appel K, Chabani E, Mironov AY, Mangiaruga A, Gott J, et al. Real-time dialogue between experimenters and dreamers during REM sleep. SSRN Electron J. 2020;1-51. DOI: https://doi. org/10.2139/ssrn.3606772
• 60 Appel K. Communication with a sleeping person [dissertação]. Osnabrück: University of Osnabrück; 2013.
• 61 Mironov AY, Sinin AV, Dorokhov VB. The method of dialogue with the sleeping subject in the state of lucid dream, using respiratory movements. Soc Technol. 2018;2:83-107. DOI: https://doi.org/10.31862/2500-2966-2018-2-83-107
• 62 Gaddy D, Klein D. Digital voicing of silent speech. In: Proceedings of the 2020 Conference on Empirical Methods in Natural Language Processing (EMNLP). 2020 Nov 16-20; Punta Cana, Dominican Republic. Punta Cana: EMNLP; 2020; p. 5521-30. DOI: https://doi. org/10.18653/v1/2020.emnlp-main.445
• 63 Meltzner GS, Heaton JT, Deng Y, Luca G, Roy SH, Kline JC. Silent speech recognition as an alternative communication device for persons with laryngectomy. IEEE/ACM Trans Audio Speech Lang Process. 2017 Nov;25(2):2386-98. DOI: https://doi.org/10.1109/TASLP.2017.2740000
• 64 Schultz T, Wand M. Modeling coarticulation in EMG-based continuous speech recognition. Speech Commun. 2010 Apr;52(4):341-53. DOI: https://doi.org/10.1016/j.specom.2009.12.002
• 65 Raduga M. Detecting lucid dreams only by submentalis electromyography. Sleep Med. 2021 Dec;88:221-30.
• 66 Berger RJ. Tonus of extrinsic laryngeal muscles during sleep and dreaming. Science. 1961 Sep;134(3482):840. DOI: https://doi.org/10.1126/ science.134.3482.840
• 67 Voss U, Holzmann R, Tuin I, Hobson JA. Lucid dreaming: a state of consciousness with features of both waking and non-lucid dreaming. Sleep. 2009 Sep;32(9):1191-200. DOI: https://doi.org/10.1093/ sleep/32.9.1191
• 68 Denis D, French CC, Gregory AM. A systematic review of variables associated with sleep paralysis. Sleep Med Rev. 2018 Apr;38:141-57. DOI: https://doi.org/10.1016/j.smrv.2017.05.005
• 69 Sharpless BA, Barber JP. Lifetime prevalence rates of sleep paralysis: a systematic review. Sleep Med Rev. 2011 Oct;15(5):311-5. DOI: https:// doi.org/10.1016/j.smrv.2011.01.007
• 70 Nan’no H, Hishikawa Y, Koida H, Takahashi H, Kaneko Z. A neurophysiological study of sleep paralysis in narcoleptic patients. Electroencephalogr Clin Neurophysiol. 1970 Apr;28(4):382-90. DOI: https://doi.org/10.1016/0013-4694(70)90231-2
• 71 Mota-Rolim SA. On moving the eyes to flag lucid dreaming. Front Neurosci. 2020 Apr;14:361. DOI: https://doi.org/10.3389/fnins.2020.00361