<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Nonhuman primates are often used to investigate physiologic processes that occur in man during aerospace/cardiovascular orthostatic research. Few studies have compared nonhuman primates and man under identical test conditions to assess the degree of similarity between the two species. Impedance plethysmography was used to measure calf, thigh, pelvic, thoracic, upper arm, and lower arm volume changes in eight rhesus (Macacca Mulatta) monkeys and twelve human subjects during four hour exposures to −6 degree head down tilt (HDT).</p>
</abstract>

Nonhuman primates are often used to investigate physiologic processes that occur in man during aerospace/cardiovascular orthostatic research. Few studies have compared nonhuman primates and man under identical test conditions to assess the degree of similarity between the two species. Impedance plethysmography was used to measure calf, thigh, pelvic, thoracic, upper arm, and lower arm volume changes in eight rhesus (Macacca Mulatta) monkeys and twelve human subjects during four hour exposures to −6 degree head down tilt (HDT).

Segmental volume and circulatory changes that occur in humans and Rhesus monkeys during 4 hour, −6 degree head down tilt

Journal of Electrical Bioimpedance

This work is licensed under the Creative Commons Attribution 4.0 International License.

Nonhuman primates are often used to investigate physiologic processes that occur in man during aerospace/cardiovascular orthostatic research. Few studies have...

GROUP	TIME	NUMBER	RI-M	RI-SE	DCI-M	DCI-SE	DSI-M	DSI-SE	AI-M	AI-SE
HUMAN-CALF	240	12	1.000	0.074	1.030	0.096	0.910	0.109	1.048	0.053
RHESUS-CALF	240	8	1.068	0.173	0.754	0.095	0.727	0.107	1.021	0.051
HUMAN-L.ARM	240	12	1.264	0.080	1.087	0.141	1.008	0.099	1.070	0.122
RHESUS-L.ARM	240	8	0.890	0.236	0.967	0.030	0.954	0.047	0.949	0.027

GROUP	TIME	NUMBER	CAFM	CAFSE	THIM	THISE	PELM	PELSE
HUMAN	240	12	0.947	0.011	0.976	0.008	1.031	0.037
RHESUS	240	8	0.931	0.037	0.965	0.034	0.997	0.027

Segmental volume and circulatory changes that occur in humans and Rhesus monkeys during 4 hour, −6 degree head down tilt

Published Online: Apr 17, 2021

Page range: 11 - 16

Received: Jan 04, 2021

DOI: https://doi.org/10.2478/joeb-2021-0003

Keywords
Bioimpedance, fluid redistribution, segmental volume

© 2021 Leslie David Montgomery, and Clarence Oloff, published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Percent calf and forearm pulse waveform parameter indices relative to control values after 4 hours of −6 degrees head down tilt.

Percent segmental volumes relative to control values after 4 hours of −6 degrees head down tilt.

Segmental volume and circulatory changes that occur in humans and Rhesus monkeys during 4 hour, −6 degree head down tilt

Published Online: Apr 17, 2021

Page range: 11 - 16

Received: Jan 04, 2021

DOI: https://doi.org/10.2478/joeb-2021-0003

KeywordsBioimpedance, fluid redistribution, segmental volume

© 2021 Leslie David Montgomery, and Clarence Oloff, published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Percent calf and forearm pulse waveform parameter indices relative to control values after 4 hours of −6 degrees head down tilt.

Percent segmental volumes relative to control values after 4 hours of −6 degrees head down tilt.

Keywords
Bioimpedance, fluid redistribution, segmental volume