When the women entered REM sleep, the researchers woke
them up and asked them what was on their minds just before waking.
The women described the dreams they'd been having and rated how positive or
negative those dreams had been.
The women reported more positive dreams when they had smelled the rose scent
during sleep, and more negative dreams when they had smelled the scent of
rotten eggs during sleep.
The type of scent didn't affect how long the dreams lasted or how bizarre
the dreams were.
It would be interesting to see if pleasant scents smelled during sleep
affect nightmares, say the
researchers, who included Michael Schredl, PhD, of the sleep laboratory at the
Central Institute of Mental Health in Mannheim, Germany.
Their findings were presented yesterday in Chicago at the annual meeting of
the American Academy of Otolaryngology - Head and Neck Surgery.