[Microsurgical anatomy of perforating branches of anterior communicating artery]. / Anatomie microchirurgicale des branches perforantes de l'artère communicante antérieure.

INTRODUCTION: The anterior communicating artery (ACoA) gives perforating branches to the optic chiasma, the hypothalamus and the corpus callosum. Perforating branches are variable (number, direction). Nevertheless, their knowledge is crucial during surgery of this area to spare injuries leading to ischemic post-operative complications. OBJECTIVE: The objective was to update the anatomical knowledge about perforating branches of the ACoA. METHODS: The study was led on a series of seven brains taken from human cadavers. An injection of latex neoprene was performed for every case. The region of interest was observed under operating microscope. Were examined: the length of the ACoA, its diameter, its orientation, its configuration and perforating branches (number and areas). RESULTS: Three cases on five presented with an anatomical variation at the level of the ACoA. The average length of AcoA was 2.1 millimeters (min: 2, max: 2.2). The average diameter of the ACoA was 1.67 mm (min: 1.1, max: 2.1). The average number of perforating branches was 4.2 (min: 2, max: 6). The presence of a median artery of the corpus callosum seemed to correlated with a low number of perforating branches. Branches supplying the optic chiasma seemed to be more numerous.

RF system of the SPring-8 storage ring.

Construction of three RF stations in the storage ring of SPring-8 has been completed. The design concept concentrates on avoiding a coupled-bunch instability which limits the stored current or makes the synchrotron radiation beam unstable. The cavity is bell-shaped to reduce the coupling impedance of the higher-order modes. The cavity dimensions are trimmed systematically to distribute the higher-order mode frequencies. Each cavity has two movable tuners. The temperature of the cavity cooling water is controlled within 0.02 K and the water flow is kept constant. The construction and commissioning of the SPring-8 storage ring RF system is reported.

[General pharmacology of 6-amino-2-fluoromethyl-3-(o-tolyl)-4(3H)-quinazolinone (afloqualone), a new centrally acting muscle relaxant. II. Effects on the peripheral system (author's transl)].

The general pharmacology of afloqualone, a new centrally acting muscle relaxant, in the peripheral system, was examined in laboratory animals and findings compared with those of some other central muscle relaxants. Afloqualone dose dependently inhibited respiration, lowered arterial blood pressure, decreased heart rate, and slightly increased femoral and renal arterial blood flow in parallel with hypotension, at doses of 1 or 2 to 20 mg/kg iv. in anesthetized cats. Afloqualone also inhibited cardiac movement in situ in anesthetized rabbits and decreased internal pressure in the urinary bladder in anesthetized cats. In in vitro experiments, afloqualone inhibited spontaneous movements of isolated rabbit atrium and ileum and isolated rat uterus at considerably high concentrations of 10(-6) g/ml or more. Oral administration of afloqualone, however, had no significant influence on respiration, the cardiovascular, digestive, and autonomic nervous systems, and urogenital organs, at doses up to 50 mg/kg except for a comparatively potent inhibitory effect on carrageenin-induced paw edema in rats. Afloqualone induced neither surface nor infiltration anesthesia.