Effect of sodium in a rehydration beverage when consumed as a fluid or meal

To investigate the impact of fluid composition on rehydration effectiveness, 30 subjects (15 men and 15 women) were studied during 2 h of rehydration after a 2.5% body weight loss. In a randomized crossover design, subjects rehydrated with water (H2O), chicken broth (CB: 109.5 mmol/l Na, 25.3 mmol/l K), a carbohydrate-electrolyte drink (CE: 16.0 mmol/l Na, 3.3 mmol/l K), and chicken noodle soup (Soup: 333.8 mmol/l Na, 13.7 mmol/l K). Subjects ingested 175 ml at the start of rehydration and 20 min later; H2O was given every 20 min thereafter for a total volume equal to body weight loss during dehydration. At the end of the rehydration period, plasma volume was not significantly different from predehydration values in the CB (-1.6 +/- 1.1%) and Soup (-1.4 +/- 0.9%) trials. In contrast, plasma volume remained significantly (P < 0.01) below predehydration values in the H2O (-5.6 +/- 1.1%) and CE (-4.2 +/- 1.0%) trials after the rehydration period. Urine volume was greater in the CE (310 +/- 30 ml) than in the CB (188 +/- 20 ml) trial. Urine osmolality was higher in the CB and Soup trials than in the CE trial. Urinary sodium concentration was higher in the Soup and CB trials than in the CE and H2O trials. These results provide evidence that the inclusion of sodium in rehydration beverages, as well as consumption of a sodium-containing liquid meal, increases fluid retention and improves plasma volume restoration.     

Centrality and Accuracy in Group Quantity Estimations.

Estimation tasks typically fall between the extremes of the intellective-judgmental task continuum. To the extent that these tasks are intellective, models predicting intragroup influence on the basis of the accuracy of proposed alternatives should provide better fit (analogous to the "truth wins" social decision scheme). To the extent that these tasks are judgmental, models predicting influence on the basis of the centrality (i.e., intragroup "averageness") of alternatives should provide better fit. Thus 2 competing hypotheses are plausible. Findings from 2 studies indicate support for the latter hypothesis. For both studies, both a median-based model and an exponentially weighted centrality model adequately fit the obtained group judgments. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Spouses of workaholics: Clinical implications for psychotherapy.

This article examines the impact of work addiction on the family system, particularly spouses of workaholics—an area that has been neglected by social scientists and mental health clinicians. An argument is made for researchers and psychotherapists to pay more attention to this essential area of mental health. Recommendations for how to address this issue in clinical settings are presented along with research considerations. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Magnetic resonance imaging for the investigation of knee injuries: an investigation of preferences

Subdural hygroma (SDG) is a common post-traumatic lesion. Despite its common occurrence, the pathogenesis and clinical significance are uncertain. The author reviewed the literature to clarify the present knowledge on the pathogenic, diagnostic and therapeutic aspects of this controversial lesion. A trivial trauma can cause a separation of the dura-arachnoid interface, which is the basic requirement for the development of a SDG. If the brain shrinks due to brain atrophy, excessive dehydration or decreased intracranial pressure, fluid collection may develop by a passive effusion. Most SDGs resolve when the brain is well expanded. However, a few SDGs become chronic subdural haematomas, when the necessary conditions persist over several weeks. Since the majority of patients with a SDG do not show a mass effect, surgery is rarely required. Outcome is closely related to the primary head injury not to the SDG itself. The complexity of SDG depends on various factors including the dynamics of absorption and expansion, duration of observation, and indication and rate of surgery, besides variety of the primary head injury in types and severity. SDG is a common epiphenomenon of head injury.     

The modulation of play fighting in rats: Role of the motor cortex.

The cortex is not necessary for rats to engage in play fighting, but it is necessary for them to modify their pattern of play fighting in different contexts. Two experiments were conducted to determine the role of the motor cortex (MC). Rats with bilateral ablations of the MC performed on Postnatal Day 10 failed to show the normally present age-related modulation in defense but were able to modulate defense with different social partners. This latter finding was confirmed in rats given ablations as adults, in which responses to social status could be monitored before and after brain damage. It appears that different forms of cortical modulation of play fighting involve different cortical circuits. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Building Fires

Abstract

This ongoing experiment in community-based, design-build pedagogy tests the deployment of direct action as a form of “insurgent architecture.” Through this we are developing strategies for design practices to mesh more productively with the everyday life of a recovering New Orleans neighborhood. While addressing both social and educational demands, this project also explores an alternative approach to architectural practice.