Abstract:
:Sniffing, a behavior that enhances detection and localization of odorants, is typically assumed to require behavioral arousal. In an effort to determine whether sniffing and arousal are dissociable, dimethyl disulfide (DMDS) was presented to 8-day-old rats while respiration and behavioral state were monitored. Pups sniffed in response to the highest concentrations of DMDS, exhibiting a lower olfactory threshold when awake. Surprisingly, sniffing occurred even while pups remained asleep. Sniffing was mediated by the olfactory system, as evidenced by the abolition of sniffing when the lateral olfactory tracts, were cut and the retention of rapid arousal in response to a trigeminal stimulant, acetic acid. Finally, sleeping pups presented with acetic acid awakened without sniffing. Thus, although olfactory threshold increases during sleep, sleeping does not preclude sniffing.
journal_name
Behav Neuroscijournal_title
Behavioral neuroscienceauthors
Seelke AM,Blumberg MSdoi
10.1037/0735-7044.118.2.267subject
Has Abstractpub_date
2004-04-01 00:00:00pages
267-73issue
2eissn
0735-7044issn
1939-0084pii
2004-12681-001journal_volume
118pub_type
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