Abstract:
:The acoustic startle reflex (ASR) in rats is attenuated by a light paired with food or, in humans, by "pleasant" pictures. Rats were trained to barpress for lateral hypothalamus (LH) stimulation. ASR amplitudes were then measured at 4 intensities, with or without a light. Control rats that did not receive brain-stimulation reward (BSR) showed initially lower ASR amplitudes than did rats exposed to BSR, but both groups responded similarly with or without light. Next, experimental rats were given BSR in the presence of light but not in its absence. After conditioning, ASR amplitudes were reduced, and ASR thresholds were raised by a mean of 2.6 dB in the light but remained at preconditioning levels without light. No such change was found for control rats or rats with placements outside the LH.
journal_name
Behav Neuroscijournal_title
Behavioral neuroscienceauthors
Steidl S,Li L,Yeomans JSsubject
Has Abstractpub_date
2001-06-01 00:00:00pages
710-7issue
3eissn
0735-7044issn
1939-0084journal_volume
115pub_type
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