No description available.

Epidemiological studies have suggested that social support may offer a protective role for cardiovascular health. More recently, researchers have begun to examine possible mechanisms by which social support may reduce cardiovascular reactivity to stress. This study was undertaken to determine if the implementation of support (presence or absence) needs to be matched with a person's habitual level of support seeking (high or low) in order to obtain physiological benefits during laboratory stressors. It was hypothesized that high support seekers assigned to a support condition would show decreased reactivity relative to all other matched or mismatched conditions. Following the screening of480 students, 135 high and low support seeking men and women were recruited for the laboratory phase. In this phase, participants performed a math and a speech task, while alone or while receiving support. Participants were randomly assigned to a condition that either matched (e.g., support provision for support seekers) or mismatched their support seeking style. Heart rate (HR), systolic blood pressure (SBP) and diastolic blood pressure (DBP) were monitored continuously. Self-report measures evaluating the participants' reactions to the task and to support were administered pre- and post-task. Although the central (match) hypothesis of this study was not supported, several interesting findings emerged: Low support seeking men exhibited larger SBP responses than did high support seeking men during the tasks. Participants receiving support showed greater SBP responses relative to participants who were alone during the tasks. Additionally, supported men showed increased DBP reactivity relative to men who were assigned to an alone condition. Interestingly, high support seeking men and women showed lower resting blood pressures than did low support seeking participants. The findings from the self-report measures did not help to clarify the cardiovascular findings. The findings suggest that future research is needed to better understand how and when support is effective in reducing cardiovascular reactivity to stress.

Thesis (Ph. D.)--University of Canterbury, 2008. / Typescript (photocopy). "11 April 2008." Includes bibliographical references (p. 245-260).

Thesis (M.S.)--University of Michigan, 1998. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 51-63).

Thesis (M. Soc. Sc.)--University of Hong Kong, 1996. / Includes bibliographical references (leaf 198-208).

Thesis (M.S.)--University of Michigan, 1998. / Includes bibliographical references (leaves 51-63).

Thesis (M.Soc.Sc.)--University of Hong Kong, 1996. / Includes bibliographical references (leaves 198-208) Also available in print.

Epidemiological studies have suggested that social support may offer a protective role for cardiovascular health. More recently, researchers have begun to examine possible mechanisms by which social support may reduce cardiovascular reactivity to stress. This study was undertaken to determine if the implementation of support (presence or absence) needs to be matched with a person's habitual level of support seeking (high or low) in order to obtain physiological benefits during laboratory stressors. It was hypothesized that high support seekers assigned to a support condition would show decreased reactivity relative to all other matched or mismatched conditions. Following the screening of480 students, 135 high and low support seeking men and women were recruited for the laboratory phase. In this phase, participants performed a math and a speech task, while alone or while receiving support. Participants were randomly assigned to a condition that either matched (e.g., support provision for support seekers) or mismatched their support seeking style. Heart rate (HR), systolic blood pressure (SBP) and diastolic blood pressure (DBP) were monitored continuously. Self-report measures evaluating the participants' reactions to the task and to support were administered pre- and post-task. Although the central (match) hypothesis of this study was not supported, several interesting findings emerged: Low support seeking men exhibited larger SBP responses than did high support seeking men during the tasks. Participants receiving support showed greater SBP responses relative to participants who were alone during the tasks. Additionally, supported men showed increased DBP reactivity relative to men who were assigned to an alone condition. Interestingly, high support seeking men and women showed lower resting blood pressures than did low support seeking participants. The findings from the self-report measures did not help to clarify the cardiovascular findings. The findings suggest that future research is needed to better understand how and when support is effective in reducing cardiovascular reactivity to stress. / Arts, Faculty of / Psychology, Department of / Graduate

No description available.

A dissertation submitted to the Faculty of Medicine University of the Witwatersrand, Johannesburg for the degree of Doctor of Philosophy in Medicine Johannesburg, 1988 / The purpose of this thesis was to investigate the value in clinical situations of the well known in vitro anti-adrenergic effects of magnesium. Research interest in magnesium has been growing rapidly over the last twenty years. However, most of this interest has focused on the clinical consequences of magnesium deficiency states and little attention has been given to magnesium as a therapeutic agent. Despite the wide use of infusions of magnesium sulphate in obstetric practice, there is a dearth of knowledge regarding the actions of magnesium on a cardiovascular system. In laboratory studies, magnesium was shown to inhibit the release of catecholamines from adrenergic nerve terminals, an action which might have great clinical implications. / IT2018