Robert M. Bauer

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Several laboratories have shown that electrical stimulation in the posterior hypothalamus inhibits the baroreceptor reflex. However, the results of these studies are difficult to interpret since it is not known if the attenuation of the baroreflex results from activation of axons of passage or from stimulation of hypothalamic cell bodies. The purpose of(More)
It is well known that electrical stimulation of an area (subthalamic locomotor region, STLR) of the posterior hypothalamus evokes locomotion as well as increases in cardiorespiratory activity. Uncertainty exists over whether these responses are due to stimulation of STLR neurons or to activation of fibers of passage originating outside this area. The(More)
It is known that muscle afferents and the hypothalamic locomotor region (HLR) both project to the nucleus reticularis gigantocellularis (NGC) and that the NGC is capable of influencing cardiovascular and respiratory variables. Therefore, the role of NGC in the cardiovascular and respiratory response to exercise-related signals was investigated in(More)
Cardiorespiratory alterations during exercise are mediated through feedback from contracting muscles and descending drive from rostral brain sites such as the posterior hypothalamus. The role of medullary sites, which process this information, was examined in this study. In anesthetized cats, muscular contraction elicited by stimulation of L7 and S1 ventral(More)
Static muscular contraction is known to elicit reflex increases in arterial pressure. However, the areas of the central nervous system that mediate this reflex remain elusive. A recent study from this laboratory suggested that neurons in the ventrolateral medulla (VLM) participate in the pressor reflex to muscular contraction. In the present study, we(More)
Previous results from this laboratory have suggested that neurons in the ventrolateral medulla (VLM) modulate the pressor response to muscular contraction. The purpose of the present study was to determine 1) if VLM neurons with a discharge pattern related to sympathetic discharge and/or the cardiac cycle are stimulated during muscular contraction, 2) if(More)
Recent studies have shown that a GABAergic mechanism in the posterior hypothalamus modulates tonic levels of arterial pressure and heart rate and the bradycardiac response to baroreceptor stimulation. It has not been determined if this modulation involves an alteration of sympathetic discharge by an effect upon hypothalamic neurons. Therefore, the purpose(More)
OBJECTIVE To evaluate visual performance and resolution through night vision goggles (NVG) before and after photorefractive keratectomy (PRK). DESIGN Nonrandomized, comparative (self-controlled) trial. PARTICIPANTS Nineteen patients (38 eyes) of active-duty US Army Special Forces soldiers. INTERVENTION PRK for myopia and astigmatism. MAIN OUTCOME(More)