Considerations sur la ramification de L'aorte abdominale du hamster (Mesocricetus Auratus)

The disposition of the abdominal aorta branching in Mesocricetus auratus is described, establishing variation groups with relation to the celiac, cranial mesenteric, renal, genital and caudal mesenteric arteries. Sixty animals (30 males and 30 females) of different ages and weights, were anesthetized with chloroform, injected with contrasting substance in the abdominal aorta (50 animals with Neoprene latex and 10 with a radioopaque mass), after which they were dissected with the help of a stereoscopic microscope. The animals with radioopaque masses were radiographed in comparison with the other animals. The results are expressed in relative percentage figures and compared with other mammalian arterial dispositions.

Modificacoes na ação mecânica do coração isolado de cobaia por doses de propafenon capazes de alterar o eletrocardiograma

Inotropic effects of Propafenon were studied in isovolumic isolated guinea pig hearts submitted to infusion of the drug during 10 minutes. The dosages utilized caused: bradycardia, depression of AV nodal conduction and QRS widening. Simultaneously there was: decrease of the developed pressure (DP) and of the rate of rise of pressure (dp/dt), and elongation of the time of peak pressure. Since there was no clear relation between the heart rate and the inotropic indices (PD and dp/dt), it could be supposed that the depressor effect was not due to impairment of the chronotropism only. After the infusion of Propafenon, the chronotropic effect disapeared after 15 min, while the inotropic state presented a less satisfatory recuperation. The coronary output accompanied the myocardial metabolic needs, that is to say, there was a fall during the period of depressed cardiac function and a later tendency to increase during recovery.

The cervical lymphatic system in newborn rats

In the present work the authors studied the morphology of the cervical lymphatic system using 26 new-born white rats of both sexes. The studies were performed by injecting China-ink under the skin of the angle of mouth and dorsal region of the auricle in order to visualize and then to proceed the dissection of lymph vessels and nodes under stereoscopic microscope. Morphological descriptions of superficial and deep lymph vessels and lymph nodes were made, recording: a dense capillary network of the superficial system that joins to larger branches going to the submaxillary lymph nodes, generally the only ones on each side; those lymph nodes send efferent branches to deep cervical lymph nodes generally also the only ones on each side; those lymph nodes give efferent branches which form the jugular lymphatic sac that joins the jugulo-subclavian junction; the jugular lymphatic sac may receive branches from the plexus, which accompany the omocervical and external jugular veins and branches coming from the thoracic limb, as well as may join the branches coming from the thorax and the branches in most of the cases form plexus branches and seldom appear by themselves.

Atividade da beta-glucuronidase no suco gástrico e mucosa gástrica de ratos submetidos a carência proteica

An experiment was performed in order to evaluate the beta-glucuronidase activity in gastric juice and gastric mucosa of rats submitted to a protein-free diet. A group of 36 young adult male Wistar rats was fed a protein-free diet ad libitum for five weeks; a second group of 36 Wistar rats ingested a purified isocaloric 12,5% casein diet for the same period. The concentration of proteins in plasma, gastric juice and gastric glandular mucosa and the beta-glucuronidase activity in the gastric juice and gastric glandular mucosa were determined. Protein deficient rats had lower plasma protein concentrations and also lower protein concentrations in gastric juice and gastric mucosa. In these animals there was no significant change of beta-glucuronidase activity in the gastric juice, but there was a significant increase of the specific enzymatic activity in the gastric mucosa. The results suggest that protein restriction in young adult rats affects the gastric mucosa. The increase of the specific beta-glucuronidase activity might be due to heightened local catabolism or to a comparatively more severe protein depletion.

CARCINO-SARCOMA 256 DE WALKER: DISSEMINACAO METASTATICA EM DUAS LINHAGENS DO TUMOR

Walker's 256 carcinoma changes its behaviour as a consequence of various factors. In this paper the authors compare the evolution of 2 lines of the tumor: WM 16 (muscular) and Christ Hospital (ascitic) both inoculated intramuscularly. Animals receiving line WM 16 had a severe rapidly progressive evolution dying around day 14 after inoculation with diffuse metastases to lymph nodes (65% of animals), kidneys (53%), spleen (50%), lungs (46.5%), liver (45%), bone marrow (44.8%), in 56% of the animals there were circulating tumoral cells. Animals receiving the Christ Hospital line survived up to 40 days, metastases were limited to lungs (48.7%) and lymph nodes (31.7%) and only in 2 of 45 animals circulating tumoral cells were observed.

the human hand. I. Movements of the index ANALYSE ELECTROMYOGRAPHIQUE DU PREMIER MUSCLE INTEROSSEUX DORSAL DE LA MAIN HUMAINE

An electromyographic study of the musculus interosseus dorsalis was performed on the right hand of 25 young adult male right-handed volunteers. The electrodes, simple coaxial needles, were implanted one at the ulnar head and the other at the radial head of the muscle. The muscles were analyzed during free movements of the index and against resistance. The same movements were done in four different positions of the fore-arm and hand, without variation in the results for each one of the movements. There was no significant difference between the activities of the ulnar head and radial head. During freely performed movements, muscle activity was recorded only during abduction. During movements against resistance, muscle activity was completely nil only during adduction; during the remaining movements, however, moderate (2+), strong (3+) and very strong activity (4+) was recorded.