+ Visit NASA.gov + Contact NASA   + Home Select Search Field * All Report - Patent Number Abstract *Accession Number *NASA Center *Author NameDocument IDKeywordsPublication Date *Title * Find Results With All of the words At least one of the words Enter Search Term  within returned results    Search Tips: Use only the fields with * to search NIX collection. Enclose terms in double quotation marks (") to search for exact phrases, ie: "space shuttle". NOTE: Commas and dashes are removed from search term by search engine. Select Reset Search button to start a new search. See Help for more tips. + Publication Year + Subject Selected Navigations: Author > Ray, C. A. [x] Sort results by: NASA Center | Date Added to NTRS | Publication Year There are a total of 13 record(s) matching your query. Sorted by: Date Added To NTRS in Descending order 1 2 Next  Effect of gender on vestibular sympathoexcitation Author(s): Ray, C. A. Abstract: Studies have suggested that premenopausal women are more prone to orthostatic intolerance than men. Additionally, it has been postulated that the vestibulosympathetic reflex is important in regulating postural-related ... NASA Center: NASA (non Center Specific) Publication Year: 2000 Added to NTRS: 2006-08-02 Document ID: 20040112743 Comparison of sympathetic nerve responses to neck and forearm isometric exercise Author(s): Steele, S. L. Jr; Ray, C. A. Abstract: PURPOSE: Although the autonomic and cardiovascular responses to arm and leg exercise have been studied, the sympathetic adjustments to exercise of the neck have not. The purpose of the present study was twofold: 1) to ... NASA Center: NASA (non Center Specific) Publication Year: 2000 Added to NTRS: 2006-08-02 Document ID: 20040141512 Muscle pain perception and sympathetic nerve activity to exercise during opioid modulation Author(s): Cook, D. B.; O'Connor, P. J.; Ray, C. A. Abstract: The purpose of this experiment was to examine the effects of the endogenous opioid system on forearm muscle pain and muscle sympathetic nerve activity (MSNA) during dynamic fatiguing exercise. Twelve college-age men (24 /- 4 ... NASA Center: NASA (non Center Specific) Publication Year: 2000 Added to NTRS: 2006-08-02 Document ID: 20040112702 Hindlimb unweighting decreases endothelium-dependent dilation and eNOS expression in soleus not gastrocnemius Author(s): Woodman, C. R.; Schrage, W. G.; Rush, J. W.; Ray, C. A.; Price, E. M.; Hasser, E. M.; Laughlin, M. H. Abstract: We tested the hypothesis that hindlimb unweighting (HLU) decreases endothelium-dependent vasodilation and expression of endothelial nitric oxide synthase (eNOS) and superoxide dismutase-1 (SOD-1) in arteries of skeletal ... NASA Center: NASA (non Center Specific) Publication Year: 2001 Added to NTRS: 2006-08-02 Document ID: 20040112323 Neck afferent involvement in cardiovascular control during movement Author(s): Bolton, P. S.; Ray, C. A. Abstract: It is well established that labyrinth and neck afferent information contributes to the regulation of somatomotor function during movement and changes in posture. There is also convincing evidence that the vestibular system ... NASA Center: NASA (non Center Specific) Publication Year: 2000 Added to NTRS: 2006-08-02 Document ID: 20040112717 Interaction between vestibulosympathetic and skeletal muscle reflexes on sympathetic activity in humans Author(s): Ray, C. A. Abstract: Evidence from animals indicates that skeletal muscle afferents activate the vestibular nuclei and that both vestibular and skeletal muscle afferents have inputs to the ventrolateral medulla. The purpose of the present study ... NASA Center: NASA (non Center Specific) Publication Year: 2001 Added to NTRS: 2006-08-02 Document ID: 20040112642 Vestibular activation of sympathetic nerve activity Author(s): Ray, C. A.; Carter, J. R. Abstract: AIM: The vestibulosympathetic reflex refers to sympathetic nerve activation by the vestibular system. Animal studies indicate that the vestibular system assists in blood pressure regulation during orthostasis. Although human ... NASA Center: NASA (non Center Specific) Publication Year: 2003 Added to NTRS: 2006-08-02 Document ID: 20040087816 Sympathetic adaptations to one-legged training Author(s): Ray, C. A. Abstract: The purpose of the present study was to determine the effect of leg exercise training on sympathetic nerve responses at rest and during dynamic exercise. Six men were trained by using high-intensity interval and prolonged ... NASA Center: NASA (non Center Specific) Publication Year: 1999 Added to NTRS: 2006-08-02 Document ID: 20040141972 Muscle sympathetic nerve responses to physiological changes in prostaglandin production in humans Author(s): Doerzbacher, K. J.; Ray, C. A. Abstract: Previous studies suggest that prostaglandins may contribute to exercise-induced increases in muscle sympathetic nerve activity (MSNA). To test this hypothesis, MSNA was measured at rest and during exercise before and after ... NASA Center: NASA (non Center Specific) Publication Year: 2001 Added to NTRS: 2006-08-02 Document ID: 20040112605 Contribution of perfusion pressure to vascular resistance response during head-up tilt Author(s): Imadojemu, V. A.; Lott, M. E.; Gleeson, K.; Hogeman, C. S.; Ray, C. A.; Sinoway, L. I. Abstract: We measured brachial and femoral artery flow velocity in eight subjects and peroneal and median muscle sympathetic nerve activity (MSNA) in five subjects during tilt testing to 40 degrees. Tilt caused similar increases in ... NASA Center: NASA (non Center Specific) Publication Year: 2001 Added to NTRS: 2006-08-02 Document ID: 20040112403 1 2 Next  + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007