Nitric oxide does not act as a mediator coupling cerebral blood flow to neural activity following somatosensory stimuli in rats.

Abstract:

:The possible role of nitric oxide (NO) on vibrissa-stimulated increase of regional cerebral cerebral blood flow (rCBF) and cerebral metabolic rate of glucose (rCMRglu) was investigated in conscious Wistar rats by using an inhibitor of NO synthase, NG-nitro-L-arginine (NOLAG) at a concentration of 30 mg/kg. In vivo autoradiography distribution with 14C-iodoantipyrine and 14C-deoxyglucose in two separate series showed CBF of 174% of control and CMRglu of 196% of control in the primary sensory cortex opposite the stimulated side in saline treated control animals. Similar increases were found in NOLAG-treated animals. Furthermore, NOLAG did not change either basal CMRglu or CMRO2. The findings suggest, that NO is not involved in coupling flow to the increased metabolism accompanying physiological sensory stimuli.

journal_name

Neurol Res

journal_title

Neurological research

authors

Wang Q,Kjaer T,Jørgensen MB,Paulson OB,Lassen NA,Diemer NH,Lou HC

doi

10.1080/01616412.1993.11740103

subject

Has Abstract

pub_date

1993-02-01 00:00:00

pages

33-6

issue

1

eissn

0161-6412

issn

1743-1328

journal_volume

15

pub_type

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