Biomaterial Database

Activation of an inhibitory noradrenergic pathway projecting from the locus coeruleus to the cingulate cortex of the rat. 1978

N Dillier, and J Laszlo, and B Müller, and W P Koella, and H R Olpe

Repetitive stimulation of the locus coeruleus evoked strong inhibition of the firing rate of about 50% of cells of the cingulate rat cortex. Forty per cent of the cells were not affected and 9% were excited by stimulation of the locus coeruleus. Pretreatment of the rats with reserpine and alpha-methyl-p-tyrosine drastically reduced the percentage of cells inhibited by locus coeruleus stimulation. The cells inhibited in response to stimulation of the locus coeruleus as well as those not inhibited were depressed by microiontophoretically applied norepinephrine. This inhibitory action of NE was observed in rats anesthetized either with urethane, chloral hydrate or with Nembutal. The transsynaptically elicited, as well as the norepinephrine elicited, depression of the cells' discharge rate was antagonized by the microiontophoretically applied beta-receptor blocking drug MJ 1999. These data suggest that the inhibitory action on cingulate cortical cells of locus coeruleus stimulation is mediated by the dorsal ascending noradrenergic pathway.

UI	MeSH Term	Description	Entries
D008125	Locus Coeruleus	Bluish-colored region in the superior angle of the FOURTH VENTRICLE floor, corresponding to melanin-like pigmented nerve cells which lie lateral to the PERIAQUEDUCTAL GRAY.	Locus Caeruleus Complex,Locus Caeruleus,Locus Ceruleus,Locus Ceruleus Complex,Locus Coeruleus Complex,Nucleus Pigmentosus Pontis,Caeruleus Complex, Locus,Complex, Locus Caeruleus,Complex, Locus Ceruleus,Complex, Locus Coeruleus,Pontis, Nucleus Pigmentosus
D008297	Male		Males
D008781	Methyltyrosines	A group of compounds that are methyl derivatives of the amino acid TYROSINE.
D009433	Neural Inhibition	The function of opposing or restraining the excitation of neurons or their target excitable cells.	Inhibition, Neural
D009434	Neural Pathways	Neural tracts connecting one part of the nervous system with another.	Neural Interconnections,Interconnection, Neural,Interconnections, Neural,Neural Interconnection,Neural Pathway,Pathway, Neural,Pathways, Neural
D009638	Norepinephrine	Precursor of epinephrine that is secreted by the ADRENAL MEDULLA and is a widespread central and autonomic neurotransmitter. Norepinephrine is the principal transmitter of most postganglionic sympathetic fibers, and of the diffuse projection system in the brain that arises from the LOCUS CERULEUS. It is also found in plants and is used pharmacologically as a sympathomimetic.	Levarterenol,Levonorepinephrine,Noradrenaline,Arterenol,Levonor,Levophed,Levophed Bitartrate,Noradrenaline Bitartrate,Noradrénaline tartrate renaudin,Norepinephrin d-Tartrate (1:1),Norepinephrine Bitartrate,Norepinephrine Hydrochloride,Norepinephrine Hydrochloride, (+)-Isomer,Norepinephrine Hydrochloride, (+,-)-Isomer,Norepinephrine d-Tartrate (1:1),Norepinephrine l-Tartrate (1:1),Norepinephrine l-Tartrate (1:1), (+,-)-Isomer,Norepinephrine l-Tartrate (1:1), Monohydrate,Norepinephrine l-Tartrate (1:1), Monohydrate, (+)-Isomer,Norepinephrine l-Tartrate (1:2),Norepinephrine l-Tartrate, (+)-Isomer,Norepinephrine, (+)-Isomer,Norepinephrine, (+,-)-Isomer
D010096	Oxprenolol	A beta-adrenergic antagonist used in the treatment of hypertension, angina pectoris, arrhythmias, and anxiety.	Coretal,Koretal,Oxprenolol Hydrochloride,Slow Trasicor,Tevacor,Trasicor,Hydrochloride, Oxprenolol,Trasicor, Slow
D011292	Premedication	Preliminary administration of a drug preceding a diagnostic, therapeutic, or surgical procedure. The commonest types of premedication are antibiotics (ANTIBIOTIC PROPHYLAXIS) and anti-anxiety agents. It does not include PREANESTHETIC MEDICATION.	Premedications
D012110	Reserpine	An alkaloid found in the roots of Rauwolfia serpentina and R. vomitoria. Reserpine inhibits the uptake of norepinephrine into storage vesicles resulting in depletion of catecholamines and serotonin from central and peripheral axon terminals. It has been used as an antihypertensive and an antipsychotic as well as a research tool, but its adverse effects limit its clinical use.	Raunervil,Raupasil,Rausedil,Rausedyl,Serpasil,Serpivite,V-Serp,V Serp
D002697	Chloral Hydrate	A hypnotic and sedative used in the treatment of INSOMNIA.	Noctec,Hydrate, Chloral