Contribution rate of cardiac output and muscle sympathetic nerve activity on orthstatic torerance after head-down bed rest in humans.

Naoki Nishimura; Satoshi Iwase; Junichi Sugenoya; Yuuki Shimizu; Hiroki Sakurai; Maki Sato; Kanikowska Dominika; Satomi Suzuki; Yoriko Watanabe; Kouji Ishida; Hiroshi Akima; Keisyo Katayama; Hiroki Takada; Yoshihisa Masuo; Kaname Hirayanagi; Tomoki Shiowaza

doi:10.14849/psjproc.2008.0_110_2

Proceedings of Annual Meeting of the Physiological Society of Japan

Session ID : 1P-I-197

DOI https://doi.org/10.14849/psjproc.2008.0_110_2

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Host: The Physiological Society of Japan

Contribution rate of cardiac output and muscle sympathetic nerve activity on orthstatic torerance after head-down bed rest in humans.

*Naoki Nishimura, Satoshi Iwase, Junichi Sugenoya, Yuuki Shimizu, Hiroki Sakurai, Maki Sato, Kanikowska Dominika, Satomi Suzuki, Yoriko Watanabe, Kouji Ishida, Hiroshi Akima, Keisyo Katayama, Hiroki Takada, Yoshihisa Masuo, Kaname Hirayanagi, Tomoki Shiowaza

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Keywords: Bed rest, MSNA, tilt test

CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract

We examine that the contribution rate of cardiac output and muscle sympathetic nerve activity (MSNA) on orthstatic torerance induced by simulated weightlessness using 20 days head-down bed rest. The subjects lay on the tilt table at the 0° horizontal position and was then inclined to the 15° head-up, 30° head-up and 60° head-up position. The tilt table remained in each position for 15 min. MSNA was recorded from the tibial nerve at the popliteal fossa with tungsten microelectrode. [J Physiol Sci. 2008;58 Suppl:S110]

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