◆ SpookStack

254 [124] LOC ROC OC EMG esate a atenaat near hs meena isa seet odie eenemnts aaa aa T3 AR a itn Monat Re tenga nal al peep IPA R ahs ante bear me PpeT tytn MR ty stone “we T Vey Pt nap kt marten ee ag I at iP Anant yet fh, 4 ‘| rr : we ‘ - en EMG . ECG AAMAS b Aa bab bbbddbbbll £44. ba debedbedibdehbbbhbtabbheslabbesscecenbihebshead a a eee one Be ON are me et ati eee call a A (44 . 7 t ee | curl Fale, ef [\ trey e er ean nemo i we J SEES | 4adulid PO OOU DADO Una neue ue CHUCePSAUSELOruss OSSHNORURNSESFSSENEVUFEFSFVESYEESSTUSNT FSTTTVTONYVNETT IVINS TTR al Figure 2: A typical lucid dream initiated from a transient awakening during REM (WILD). Salbrasons are 0 nV ands geese loved For Release 2000/08/08 : CIA-RD LaBERGEAPRROME RHA Release 2000/08/08 : CIA-RDP96-00789R003100140001-2 (1b DREAMING 255 [125] Table 1 Comparisons of Physiological Variables for Lucid and Non-lucid Epochs eee Vartables are averaged over REM Periods and subjects. L = mean value for lucid epochs; N = mean value for non-lucid epochs; LND=mean value of difference score for lucid minus non-lucid epochs. REM density (EM) EML > EMN (t(12)=4.36; p<.0001] EMLND > 0 [c(12)=3.93; p<.002] Respiration Rate (RR) RRL > RRN [(7}=4.07; p<.004] RRLND > 0 [(7)=4.49; p<.004] Heart Rate (HR) HRL > HRN [(8)=2.54; p<.025] HRLND > 0 [(8)=2.91; p<.01] Skin Potential (SP) SPL > SPN [(8) = 3.00; p<.01] SPLND > [(8)=2.41; p<.01] epochs of SVLD REM periods are characterized by significantly higher levels of physiological activation than are epochs of preceding non-lucid REM from the same REM period (see Table 1). In order to follow the temporal variations of physiology correlated with the development and initiation of lucidity, for each SVLD REM period the physiological variables were converted to Z-scores and averaged across dreams and subjects. Figure 3 is a histogram of the resultant mean Z-scores for the ten minutes before and the five minutes after the initiation of lucidity. Note the highly significant increases in physiological activation during the 30 seconds before and after lucidity onset. Physiological data (EM, RR, HR, and SP) were scored for 61 control non-lucid REM periods (NLREMPs), derived from the same 13 subjects, in order to allow comparison with SVLDs (LDREMPs). Mean values for EM and SP were signifi- cantly higher for LDREMPs than NLREMP controls (RR and HR did not differ). If lucid dream probability (LDPROB) were constant across time during REM periods, lucid dreams should occur most frequently in the first few minutes of REM. On this hypothesis, LDPROB should be a monotonically decreas- ing function of time into REM, following the survivor function of mean REM period lengths (REMLEN). Although REMLEN proved to be an excellent predictor of LDPROB (r=.97, p<.005), our data showed that LDPROB does not reach its maximum before about five to seven minutes into REM. The discrepancy between theory and observation is particularly acute for WILDs: only one out of 21 WILDs occurred during the first four minutes of REM, suggesting that there must be another factor contributing to the distribution P96-00789R003100140001-2