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Titolo:
INCREASED AND DECREASED CHOROIDAL BLOOD-FLOW ELICITED BY CERVICAL SYMPATHETIC-NERVE STIMULATION IN THE CAT
Autore:
ABE S; KARITA K; IZUMI H; TAMAI M;
Indirizzi:
TOHOKU UNIV,SCH MED,DEPT OPHTHALMOL,AOBA KU SENDAI MIYAGI 980 JAPAN TOHOKU UNIV,SCH DENT,DEPT PHYSIOL,AOBA KU SENDAI MIYAGI 980 JAPAN
Titolo Testata:
Japanese Journal of Physiology
fascicolo: 2, volume: 45, anno: 1995,
pagine: 347 - 353
SICI:
0021-521X(1995)45:2<347:IADCBE>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
VASODILATION; INNERVATION; UVEAL; EYE; LIP;
Keywords:
CHOROIDAL BLOOD FLOW; SYMPATHETIC STIMULATION; CERVICAL SYMPATHETIC NERVE; BLOOD FLOW INCREASE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
18
Recensione:
Indirizzi per estratti:
Citazione:
S. Abe et al., "INCREASED AND DECREASED CHOROIDAL BLOOD-FLOW ELICITED BY CERVICAL SYMPATHETIC-NERVE STIMULATION IN THE CAT", Japanese Journal of Physiology, 45(2), 1995, pp. 347-353

Abstract

The effect of electrical stimulation of the cervical sympathetic nerve on choroidal blood flow in the cat was investigated. Flow at varioussites in 30 pentobarbital-anesthetized cats was continuously measuredtrans-sclerally using a laser Doppler flowmeter. Changes in either direction, increases and decreases, occurred in response to electrical stimulation of the peripheral cut end of the cervical sympathetic nerve. These changes in flow appeared to depend on the site of choroidal blood flow measurement, as decreases were seen at sites with a high baseline blood flow and increases at sites with a low baseline level. Bothtypes of response were reduced when the cats were treated with the alpha-adrenoceptor antagonist phentolamine, but not by treatment with the beta-adrenoceptor antagonist propranolol. The decrease in choroidal blood flow elicited by cervical sympathetic nerve stimulation appears to be mediated via the vasoconstrictor fibers in that nerve. A choroidal blood flow increase may occur as a secondary effect following vasoconstriction of the arterioles elicited by cervical sympathetic nerve stimulation, producing a passive net increase in choroidal blood flow.

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Documento generato il 29/11/20 alle ore 16:12:44