German researchers have found that the emotional qualities of dreams are influenced by olfactory stimuli. According to the study presented at a recent Otolaryngology meeting, the smell of rotten eggs gave subjects bad dreams, while the smell of roses gave good dreams. The scents were dispersed while subjects slept, and the quality of the dreams was reported by the subjects upon waking. This study is the first of its kind, and researchers say it points to the possibility of therapy involving “nocturnal olfactory stimulation.”
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