High-normal blood glucose levels may be associated with decreased spatial perception in young healthy adults.

The negative effects of high normal glucose on cognitive function were previously reported in euglycemic individuals of middle age and the elderly population. This study aimed at examining the effect of baseline blood glucose levels on spatial ability, specifically verticality perception on the computerized rod and frame test (CRFT) in young healthy adults. 63 healthy male medical students (age range from 18-23 years), of whom 30 were non-fasting outside the month of Ramadan and 33 fasting during Ramadan of the year 2016, were recruited in order to create varying degrees of glycemia during which verticality perception was carried out. Baseline blood glucose reading was obtained prior to commencing the CRFT test. Blood glucose levels at the time of testing decreased as the duration between the last meal and testing increased. A blood glucose range of 62-117 mg/dl was achieved among participants for this study. Linear regression analysis showed that blood glucose level at testing correlated positively with all alignment spatial error parameters, indicating a probable reduction of spatial perception ability with higher blood glucose levels. These results are consistent with other cognitive studies in older healthy humans and emphasize the critical impact of early glucose dys-homeostasis on cognitive function. They also indicate that elevated blood glucose may affect cognitive functioning outside of the usual complications of diabetes

PLASMAS DENSES A FORTE CORRÉLATION PRODUITS PAR EXPLOSION DE FILAMENT GAZEUX IONISÉ

Une décharge impulsive intense est injectée dans un filament gazeux ionisé afin d'échauffer le plus petit volume de gaz possible en utilisant un confinement inertiel et magnétique. Les mesures optiques et électriques permettent d'étudier la décharge au cours de son expansion. Au temps t = 300 ns (par exemple) le diamètre de la décharge est 2 mm, la densité de courant 1,7 MA/cm2. La pression dynamique est de quelques kbars et la pression magnétique de 1,6 kbar. La densité électronique sur l'axe est 1019 cm-3 et la température 1 keV. La couche mince de 5 µ superficielle est à 10 eV et 1021 cm-3. Ces deux plasmas très différents sont également à forte corrélation : le plasma superficiel par suite du petit nombre de particules dans la sphère de Debye et le plasma axial par suite des instabilités et de la turbulence qui y règnent.An intense impulsive discharge is fed through an ionized gaseous filament with the purpose to heat the smallest volume of plasma ; we use an inertial and a magnetic confinement. The optical and electrical measurements allow us to study the discharge during its expansion. At the time t = 300 ns (as an exemple) the discharge diameter is 2 mm and the current density reaches 1.7 MA/cm2. The dynamic pressure is about a few kilobars, and the magnetic pressure is 1.6 kbar. On the axis, the electron density is about 1019 cm-3 and the temperature 1 keV. The thin peripheral sheet has Ne = 1021 cm-3 and T = 10 eV. These two plasmas are very different, but both are strongly coupled plasmas : the surface one because of the little number of particles in Debye Sphere, and the core plasma because of the instabilities and the turbulences which occur in it