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Evidence of functional hyperemia in the rat hippocampus during mild treadmill running.

Abstract：

:Exercise appears to improve hippocampal plasticity and cognitive function, leading us to postulate that exercise may activate hippocampal neurons, which in turn increase hippocampal cerebral blood flow (Hip-CBF). Recent studies using laser-Doppler flowmetry (LDF) have shown that Hip-CBF increases with behavior and locomotion, but it has not been examined whether these changes are due to neuronal activation. We aimed to examine whether functional hyperemia, an increase in cerebral blood flow in response to neuronal activation, can occur in the exercising rat hippocampus. We applied a treadmill running model of rats and LDF combined with microdialysis. Prolonged mild treadmill running (10 m/min) resulted in an increase in Hip-CBF of 26+/-9% versus basal level. When tetrodotoxin was infused via microdialysis into the loci where Hip-CBF was monitored, the increased Hip-CBF with running was completely suppressed. These results provide evidence that functional hyperemia occurs in the rat hippocampus during mild treadmill running and suggest that our running animal model may be useful for examining the underlying mechanisms of exercise-induced hippocampal functional hyperemia.

journal_name

Neurosci Res

journal_title

Neuroscience research

authors

Nishijima T,Soya H

doi

10.1016/j.neures.2005.11.005

subject

Has Abstract

pub_date

2006-03-01 00:00:00

pages

186-91

issue

3

eissn

0168-0102

issn

1872-8111

pii

S0168-0102(05)00299-3

journal_volume

54

pub_type

杂志文章

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