[Some functional aspects of the temporomandibular joint]. / Alguns aspectos funcionais da articulação temporomandibular.

The authors emphasize the some functional characteristics of the Temporomandibular join, TMJ, and were made comparative study of the auscultatory and sphymografic techniques to TMJ examination. The findings shown that the auscultatory technique furnished important dates to preliminary diagnosis of the TMJ disfunction.

[Effects of dehydration on voluntary consumption of rehydration solution in rats]. / Efeitos da desidrataçao sobre o consumo voluntário de soluçoes de reidrataçao em ratos.

The solutions preference and the body mass variations during rehydration was analyzed in dehydrated rats. The dehydration was provoked by hydroprivation during 72 hours. The results shows a sodium chloride specific appetite, mainly in the initial part of the rehydration, and hypo, and isotonic sodium chloride solutions preference. The sodium chloride, and glicose solutions treatment was better than other solution in the body mass recovery.

[The effects of visual and auditory stimulation on arterial pressure and urinary sodium excretion in rats]. / Efeitos do estresse visual e auditivo sobre a pressão arterial e excreção urinária de sódio, em ratos.

Countless sistemic alterations are broken out by stimuli originated by environmental, nutritional and hormonal conditions that are disadvantageous. In order to verify the effects of these stimuli on the arterial pressure and the urinary excretion of sodium, a group of 100 animals were submitted to illumination for 24 hours, auditive stimulation, dehydration and injection of adrenaline. The results show that constant illumination provokes and increase of arterial pressure (p less than 0.01), that is installed in the first 24 hours and its kept until the end of the experiment. The phasic auditive stimulation encourages an increase of arterial pressure (p less than 0.01) and its consistent to every stimulation. The arterial pressure amount in the introduction of prolonged auditive stimulation (p less than 0.01) but decreases in function of the time of the application of the stimulus. The application of illumination followed by injection of adrenaline, and illumination followed by dehydration not changing the response obtained us an isolated luminous stimulus. The urinary sodium excretion, was increased (p less than 0.01). Based on the results we arrived to the following conclusions: 1) The application of constant illumination and auditive stimulation provoke an increase of arterial pressure; 2) The pressuring responses to the phasic and continuous auditive stimulations are different; 3) There is an increase in the urinary sodium excretion.

[Influence of pre- and post-operative treatment with saline glucose solution on oral surgery wound healing. Histological study in rats]. / Influência do tratamento pré e pós-operatório com solução salina glicosada sobre o reparao tecidual de cirurgias bucais. Estudos histológico em ratos.

The liquids are essential nutrients to normal organic function. The corporal growing and development, and the tissue neoformation are affected by the hydrosaline unbalanced. In 100 albinus rats submitted to 24 hours of hydroprivation in the pre and post-operative periods was studied the effect of the saline/glucose treatment on the wound healing. With five groups of 20 animals was shaped: GI - Control, and GII.1 - Saline/glucose pre-operative treatment, and GIII.1 - Saline/glucose post-operative treatment, and GII.2 - water pre-operative treatment, and G-III.2 - water post-operative treatment. In 1, 3, 9, 15 and 21 post-exodontic days the histological analyses of wound healing was did. The results show that the saline/glucose treatment to promove amount in the bone tissue and the osteoblastic activity, with better recuperation of the unbalanced hydrosaline effect. The conclusion is that: 1) the saline/glucose solution aid the tissue neoformation and the wound healing; 2) this effect is consistent in the pre and post-operative periods.

Functional characterization of the neurodepressing hormone in the crayfish.

The effect of the neurodepressing hormone (NDH) was studied on different identified motoneurons in the abdominal ganglia of the crayfish Procambarus bouvieri (Ortmann). Although differences in sensitivity were apparent, all the neurons tested responded to NDH with a reduction in spontaneous firing rate, which lasted as long as NDH was present, and, depending on the concentration and time of action of the hormone, for even longer periods. NDH activity was determined in the various parts of the central nervous system of the crayfish, being highest in the eyestalk, gradually diminishing away from the eyestalk, with a cephalo-caudal gradient, being lowest in the abdominal ganglia. High levels of NDH activity were detected in the blood. After eyestalk ablation, NDH concentration steadily diminishes in the blood and central nervous system, until virtually disappearing after 4 days; from day 5 onwards, the activity is recovered up to its original levels. NDH synthesis takes place with a time constant of approximately 3 hr in cultured isolated segments of central nervous system, being highest in the eyestalk.