Race differences in cardiovascular and cortisol responses to an interpersonal challenge in women who are family caregivers.

Objectives: To examine race differences in psychosocial and psychophysiological responses to family caregiving.

Design: Participants completed paper-and-pencil surveys and were exposed to a laboratory-based interpersonal challenge that included a period of rest, an interpersonal challenge, and a period of recovery.

Setting: A university research laboratory.

The effects of chronic treadmill and wheel running on behavior in rats.

In order to better understand the behavioral adaptations induced by physical activity, this set of experiments assessed the effects of two modes of running exercise on a battery of behavioral tests. The effects of 8 weeks of forced treadmill running and voluntary wheel running on behavior measures in the elevated plus maze, open field, social interaction and conditioned freezing paradigms were investigated. Eight weeks of treadmill running did not alter behavior in any test paradigm.

Physiological and psychological correlates of fatigue in HIV disease.

Fatigue is a frequent symptom reported by persons living with HIV disease and one that affects all aspects of quality of life. To improve quality of care of persons with HIV disease, it is important to address all factors that contribute to fatigue. The purpose of this study was to determine the associations of physiological, psychological, and sociological factors with fatigue in an HIV-infected population.

Differential release of corticotropin-releasing hormone (CRH) in the amygdala during different types of stressors.

The purpose of this study was to determine if differences exist between the effects of acute treadmill running and restraint stress on corticotropin-releasing hormone (CRH) release within the amygdala of rats. Extracellular CRH immunoreactivity (CRH-IR) was measured in microdialysate collected from the central nucleus of the amygdala (CeA) during exposure to an inactivated treadmill (TC), during 1 h treadmill running to exhaustion (RUN), and 1 h restraint (RES). Extracellular CRH-IR increased from control levels during the first 20-min period for TC, RUN, and RES, with the largest increase during RES.