Some individuals show severe cognitive impairment when sleep deprived, whereas others are able to maintain a high level of performance. Such differences are stable and trait-like, but it is not clear whether these findings generalize to physiologic responses to sleep loss. Here, we analyzed individual differences in behavioral and physiologic measures in healthy ethnic-Chinese male volunteers (...

Instrumental acoustic measurements of the human voice have enormous potential to objectively describe pathology and, thereby, assist clinical treatment decisions. Despite increasing application and accessibility technical knowledge equipment, recent research has highlighted a lack understanding physiologic, speech/language-, culture-related influencing factors. This article presents critical re...

Rev Esp Cardiol 2004;57(12):1139-42 1139 Pressure gradients in the left ventricle (LV) during ejection have traditionally been considered a pathological finding. For more than 20 years, however, systolic intraventricular pressure gradients (IVPGs) have been known to exist in physiologic form in normal subjects. Using high-fidelity micromanometers, pressure differences of 3 to 5 mm Hg between th...

Blood transfusion in burns larger than 20% total body surface area (TBSA) are frequent due to operative procedures, blood sampling, and physiologic response to burn injury. Optimizing the use of blood transfusions requires an understanding of the physiology of burn injury, the risks and benefits of blood transfusion, and the indications for transfusion. Age also plays a role in determining bloo...

OBJECTIVE The census classification of Hispanic origin is used in epidemiological studies to group individuals, even though there is geographical, cultural, and genetic diversity within Hispanic Americans of purportedly similar backgrounds. We observed differences in our measures of adiposity between our two Mexican American populations, and examined whether these differences were attributed to...

OBJECTIVE To evaluate perfusion of abdominal organs in healthy cats by use of contrast-enhanced ultrasonography. ANIMALS 10 young healthy anesthetized cats. PROCEDURES Contrast-enhanced ultrasonography of the liver, left kidney, pancreas, small intestine, and mesenteric lymph nodes was performed on anesthetized cats. RESULTS Typical perfusion patterns were found for each of the studied or...

THE physiologic responses to surgical situations encountered in infancy and early childhood differ from those expected in adult patients. As the age of a child increases, his physiology approaches that of an adult and conversely the younger (or at times the smaller) the pediatric patient, the greater is his variation in physiologic response. The differences are not solely quantitative, and many...

background: myocardial infarctions at different locations have been related to different sets of risk factors. this study was designed to examine the association between cardiovascular risk factors and specific coronary artery calcification (cac). methods: the study population comprised 573 postmenopausal women selected from a population-based cohort study. established vascular risk factors wer...