This subproject is one of many research subprojects utilizing theresources provided by a Center grant funded by NIH/NCRR. The subproject andinvestigator (PI) may have received primary funding from another NIH source,and thus could be represented in other CRISP entries. The institution listed isfor the Center, which is not necessarily the institution for the investigator.This is a pilot study designed to determine the contribution of myogenic tone vs. sympathetic nervous system influences on vascular tone in skeletal muscle vascular beds. Ten healthy subjects ages 18 to 35 will be recruited to undergo procedures to determine vascular resistance in both arms during lower body negative pressure and localized negative pressure in one arm. The hypothesis to be tested is that vascular resistance will be higher in the arm under the influence of both myogenic (negative arm pressure) and sympathetic activity (lower body negative pressure) than the arm under sympathetic influence alone (no negative pressure). Subjects will have their arm and legs subjected to negative pressure according to established methods. Heart rate and blood pressure will be monitored by a finger cuff. Brachial artery flow and diameter will be assessed using a Doppler probe and intravenous catheters will be placed in each arm to monitor norepinephrine levels.

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
General Clinical Research Centers Program (M01)
Project #
5M01RR010732-14
Application #
7718771
Study Section
National Center for Research Resources Initial Review Group (RIRG)
Project Start
2008-04-01
Project End
2009-03-31
Budget Start
2008-04-01
Budget End
2009-03-31
Support Year
14
Fiscal Year
2008
Total Cost
$2,434
Indirect Cost
Name
Pennsylvania State University
Department
Type
Schools of Medicine
DUNS #
129348186
City
Hershey
State
PA
Country
United States
Zip Code
17033
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