Biomedical subjects
Publications and source records attributed to M Laude.
The pisiform is the only moving structure of the canalis carpi. In the power grip, it undergoes a posterior and medial movement, limited by the pisohamate ligament. This motion is indispensable for a good prehension. The strength of the pisohamate ligament effectively balances the dislocation tendency the flexors carpi ulnaris exert on the pisiform.
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The tela choroidea of the fourth ventricle of the cat is vascularized principally by the caudal cerebellar artery and secondarily by the dorsal plexus of the medulla oblongata. The choroidal branches that result from these two systems give the capillary network of the choroidal plexus. This drains rostrally into the emissary veins, tributaries of the cerebellar veins, or caudally, towards the dorsal plexus of the medulla oblongata, which is itself a tributary of the rostral petrosal veins.
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By 25 dissections, an angulation of 40 degrees at the emergency of the trigeminal nerve was observed. To the three types of fibers described by SICARD, a fourth type is added of V2 fibers wrapped by cranio-median and caudo-lateral fibres. Two groups form the motor root, a postero-superior group and an antero-inferior group. Anastomoses exist between the motor and sensitive roots as well as a few unusual sensitive rootlets.
The study has been carried out on eight cases of pulmonary atresia with ventricular septal defect, this abnormality involves both valvular atresia and the stenosis of the outflow tract of the right ventricle; that means a pulmonary atresia both valvular and infundibular. The atresia is always combined with a dextroposition of the aorta, overriding the ventricular septum; often with an auricular septal defect or a patency of the foramen ovale. In two cases, other associative caridac malformations exist : either a single ventricle or an atresia of the tricuspid valve. The arterial supply to the lungs may be assured by a persistent duct or by systemic arteries, or an association of both.
The human inferior choroid tela is vascularized by the posterior inferior cerebellar arteries and the anterior inferior cerebellar arteries. These arteries give off small choroid branches which supply the velate and choroid capillary networks. The latter drain downwards, into the posterior bulbar veins system, or upwards, into the veins of the lateral recess of the fourth ventricle, all of which are tributary to the two superior petrosal veins.
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The main features of the arterial plane of the base of the brain of 15 sheep are studied. Details of the topography and the importance of the manifold twigs going to the optic-peduncular formations and grey central nuclei are given also. In spite of the presence of a peculiar arterial polygon, since it has direct supply from a rete mirabile and that it depends almost exclusively on the external carotid arteries, the general diagram of the different arterial pedicles appears comparable with what was formerly pointed out in the dog (LIBERSA an coll., 1974) and even in man. It seems to be a proof of the morphological independance of the cerebral arterial system beyond the arterial polygon. The reason of the existence and appearance of the arterial plane of the base of the brain (internal carotid, external carotid, vertebral arteries) keeps an essentially functional meaning.
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