Effects of nimodipine on EEG and 31P-NMR spectra during and after incomplete forebrain ischemia in the rat.

Abstract:

:The effect of nimodipine was studied on EEG power density spectra as well as on 31P-NMR spectra of the brain before, during and after four-vessel occlusion (FVO) in the restrained conscious rat. EEG-spectral analysis: eight rats were submitted to 5 min FVO and four of them received nimodipine (1 mg/kg orally) 75 min before FVO. In the nimodipine-treated rats the post-ischemic overshoot of the EEG power density was significantly lower for the theta, alpha and beta band activity. 31P-NMR spectroscopy: the relative concentrations of phosphocreatine (PCr), ATP and Pi as well as intracellular pH were measured at different intervals after 10 min FVO (n = 10). All values normalised within 15-30 min after restoration of cerebral blood flow without significant differences between nimodipine-treated and control rats. It is concluded that pretreatment with nimodipine has a decreasing effect on the overshoot in EEG power density after transient incomplete forebrain ischemia. This effect was not correlated to significant changes in cerebral 'energy state', as measured by 31P-NMR spectroscopy.

journal_name

Eur J Pharmacol

authors

Deutz NE,Chamuleau RA,Bovée WM,Van der Werf AJ

doi

10.1016/0014-2999(86)90799-5

subject

Has Abstract

pub_date

1986-06-24 00:00:00

pages

429-35

issue

3

eissn

0014-2999

issn

1879-0712

pii

0014-2999(86)90799-5

journal_volume

125

pub_type

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