Healthy adult
Conditions
Interventions
Phenylethyl alcohol (rose-like odor) will be presented during subjects'
REM sleep. After the presentation, subjects will be awaken and rate their dream emotionality. For the same subjects, at same night, only airflow without any odor will be also presented as control con
Sponsors
International Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1) They do not have difficulty in filling out Japanese explanatory documents, consent forms, and survey forms. 2) They can stay in the sleep chamber of human sleep laboratory, WPI-IIIS, University of Tsukuba. 3) They have no sleep disorder, olfaction/taste disorder and no history. 4) Their subjectively rating of phenylethyl alcohol odor is strong or weak, deviating from average. * In the screening, the impression of odor (subjective intensity, like/dislike, familiarity, etc.) will be evaluated on a 9-point scale that labeled "very weak (1 point)" to "neither (5 points)" to "strong (9 points)". Regarding the subjective intensity, rater of 1 to 3 points will be classified as "low group" and 6 to 9 points will be "high group". This criterion had been determined using data from a total of 407 people (age range: 18 to 25 years) obtained from our previous studies (Okabe et al., 2018; 2020), as 1-3 points for weak group and 8-9 points for strong group. However, we predicted that we would not be able to obtain enough number of strong group when we got about 100 data at screening, so we modified the criteria of strong group to 6-9 points. 5) Their subjective rating of phenylethyl alcohol odor is moderate at favor and familiarity. * Regarding favor, 3 to 6 points are "moderate", from the scale of "very dislike (1 point" to "neither (5 points)" to "very like (9 points)". Regarding familiarity, 4 to 7 points are "moderate", from the scale of " know very little (1 point)" to "neither (5 points)" to "very familiar (9 points)".
Exclusion criteria
Exclusion criteria: 1) Persons with claustrophobia 2) Women who are or may be pregnant 3) Lactating women 4) Patients who may have sudden changeable sickness or have a history 5) Any other person judged by the investigator to be inappropriate as a subject * The above is set for safety considerations.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Emotionality of dreams Subjects will rate their own dreams with the Dream property scale (Takeuchi et al., 1996), at awakenings after odor presentation during REM sleep. | — |
Countries
Japan
Contacts
Public ContactSatomi Okabe
University of Tsukuba International Institute for Integrative Sleep Medicine (WPI-IIIS)
Outcome results
None listed