Abstract:
:These experiments examined the sufficiency of pairing an odor with either intrabulbar activation of noradrenergic beta-receptors or pharmacological stimulation of the locus coeruleus to support learned odor preferences in Postnatal Day 6-7 rat pups. The results showed that pups exposed to odor paired with beta-receptor activation limited to the olfactory bulb (isoproterenol, 50 microM) displayed a conditioned approach response on subsequent exposure to that odor. Furthermore, putative stimulation of the locus coeruleus (2 microM idazoxan or 2 mM acetylcholine) paired with odor produced a subsequent preference for that odor. The effects of locus coeruleus stimulation could be blocked by a pretraining injection of the beta-receptor antagonist propranolol (20 mg/kg). Together these results suggest that convergence of odor input with norepinephrine release from the locus coeruleus terminals within the olfactory bulb is sufficient to support olfactory learning.
journal_name
Behav Neuroscijournal_title
Behavioral neuroscienceauthors
Sullivan RM,Stackenwalt G,Nasr F,Lemon C,Wilson DAdoi
10.1037/0735-7044.114.5.957subject
Has Abstractpub_date
2000-10-01 00:00:00pages
957-62issue
5eissn
0735-7044issn
1939-0084journal_volume
114pub_type
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