Abstract:
:Extracellular recordings were made from 467 anti-dromically identified neurosecretory neurons and 148 non-neurosecretory neurons in the paraventricular nucleus of the hypothalamus of hemispherectomized cats under pentobarbital anesthesia. Stimulation of the dorsal, median, and pontine raphe nuclei excited 31%, 26%, and 12% of neurosecretory neurons tested, respectively, and inhibited 9%, 7%, and 8%. The excitatory responses in 13 of 14 neurons tested were blocked by either of two intravenously administered 5-HT2 antagonists, cyproheptadine or methysergide. The 5-HT1A antagonist, (-)pindolol, partially blocked the excitatory responses elicited by raphe stimulation in three of five neurons tested. The inhibitory responses to raphe stimulation were not affected by application of these antagonists. More non-neurosecretory neurons than neurosecretory neurons were excited in response to raphe stimulation and these excitatory responses were also blocked by these antagonists. We conclude that most electrically stimulated synaptic inputs from the midbrain raphe nuclei to the hypothalamic paraventricular nucleus are excitatory and are mainly mediated by 5-HT2 receptors.
journal_name
Brain Res Bulljournal_title
Brain research bulletinauthors
Kawano S,Osaka T,Kannan H,Yamashita Hdoi
10.1016/0361-9230(92)90105-7keywords:
subject
Has Abstractpub_date
1992-04-01 00:00:00pages
573-9issue
4eissn
0361-9230issn
1873-2747pii
0361-9230(92)90105-7journal_volume
28pub_type
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journal_title:Brain research bulletin
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journal_title:Brain research bulletin
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journal_title:Brain research bulletin
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journal_title:Brain research bulletin
pub_type: 杂志文章
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/j.brainresbull.2011.03.025
更新日期:2011-07-15 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/0361-9230(89)90022-1
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pub_type: 杂志文章
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journal_title:Brain research bulletin
pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Brain research bulletin
pub_type: 杂志文章,评审
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journal_title:Brain research bulletin
pub_type: 杂志文章
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journal_title:Brain research bulletin
pub_type: 杂志文章
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更新日期:1996-01-01 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
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更新日期:1996-01-01 00:00:00
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journal_title:Brain research bulletin
pub_type: 杂志文章
doi:10.1016/j.brainresbull.2007.10.020
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pub_type: 杂志文章
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