| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2009-10-13 |
| タイトル |
|
|
タイトル |
Modulation of Evoked Cerebral Blood Flow under Excessive Blood Supply and Hyperoxic Conditions |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
cerebral blood flow |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
laser-Doppler flowmetry |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
hypercapnia |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
hyperoxia |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
neuronal activation |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 著者 |
Matsuura, Tetsuya
Fujita, Hideaki
Kashikura, Kenichi
Kanno, Iwao
|
| 著者(機関) |
|
|
値 |
Akita Laboratory, Japan Science and Technology Corporation, Akita Research Institute for Brain and Blood Vessels (Present address): Department of Welfare Engineering, Faculty of Engineering, Iwate University |
| 著者(機関) |
|
|
値 |
Akita Laboratory, Japan Science and Technology Corporation,Akita Research Institute for Brain and Blood Vessels |
| 著者(機関) |
|
|
値 |
Akita Laboratory, Japan Science and Technology Corporation,Akita Research Institute for Brain and Blood Vessels |
| 著者(機関) |
|
|
値 |
Department of Radiology and Nuclear Medicine, Akita Research Institute of Brain and Blood Vessels,(Present address): National Institute of Radiological Sciences, Japan |
| 登録日 |
|
|
日付 |
2009-10-13 |
| 書誌情報 |
The Japanese Journal of Physiology
巻 50,
号 1,
p. 115-123,
発行日 2000-01-01
|
| ISSN |
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収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0021-521X |
| Abstract |
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|
内容記述タイプ |
Other |
|
内容記述 |
We measured the field potential and local cerebral blood flow (LCBF) using laser-Doppler flowmetry in α-chloralose anesthetized rats during activation of the somatosensory cortex by electrical stimulation of the hind paw under independent administration of additional carbon dioxide and oxygen. The aim of this study was to test the hypothesis that the increase in LCBF during activation of the cortex (evoked LCBF) is not directed toward supplying oxygen for oxidative metabolism. Under the hypercapnic condition (PaCO2 = 74.9 ± 14.3 mmHg), the baseline LCBF was about 46.5% higher than that under the normocapnic condition (PaCO2 = 35.7 ± 2.1 mmHg) (p < 0.001), but after normalization for each baseline (divided by the prestimulus level), there was no significant difference in the peak value and the rise time of normalized evoked LCBF. On the other hand, the baseline level of LCBF under the hyperoxic condition (PaO2 = 479.4 ± 77.2 mmHg) was about 5.0% lower than that under the normoxic condition (PaO2 = 105.5 ± 7.8 mmHg) (p < 0.01), suggesting mild vasoconstriction under the condition of hyperoxia at rest. The peak value of normalized evoked LCBF under the hyperoxic condition was about 6.5% higher than that under the normoxic condition (p < 0.05). In addition, the rise time of evoked LCBF was earlier under the hyperoxic condition (0.37 ± 0.16 s) than that under the normoxic condition (0.52 ± 0.12 s) (p < 0.01). The field potential measured during stimulation under hypercapnic and hyperoxic conditions was not significantly different when compared with that under normal gas conditions. These results support our hypothesis and suggest that the excess oxygen is involved in the mechanism underlying the regulation of LCBF. |
| 出版者 |
|
|
出版者 |
日本生理学会 |
| 権利 |
|
|
権利情報 |
Copyright (c) 2000 日本生理学会 |
| DOI |
|
|
関連タイプ |
isIdenticalTo |
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
10.2170/jjphysiol.50.115 |
| 著者版フラグ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
jjp-v50n1p115-123.pdf (121.4 kB)
