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V Smith Agreda

Publications and source records attributed to V Smith Agreda.

5 recordsLinked to original sources
PubMed1990

[Angiodysplasia of the colon and Crohn's disease. A study with vascular resin casts].

All the previous studies which have associated arteriovenous malformations of the colon with chronic inflammatory disease have always been performed on a diseased intestine. This study, which uses the intravascular injection of resin, shows morphological evidence that angiodysplasia of the colon and intestinal inflammatory disease can coexist independently. This fact suggests that in cases of severe hemorrhage in a patient with inflammatory disease of the small intestine, it cannot simply be assumed that it originates in the macroscopically abnormal intestine, and that angiographic examination is a wise measure to rule out the possibility of arteriovenous malformations in the "normal" intestine.

Aged↗
PubMed1988

Neuronal relationships between the dorsal periaqueductal nucleus and the inferior colliculus (nucleus commissuralis) in the cat. A Golgi study.

Cell types in the dorsal periaqueductal nucleus (PAGd) were studied with the aid of the rapid Golgi method in young cats. The neurons were subdivided into fusiform and stellate types with several varieties of the latter class according to the final destination of their axons. Fusiform neurons send their axons to the neuropil of the Ncom. In turn these neurons receive descending fibres from the nucleus commissuralis (Ncom) which seem to establish axo-dendritic contacts. Also commissural neurons receive contacts from ascending fibres of the PAGd. On the basis of Golgi material it is concluded that particular neuronal types of the PAGd could establish reciprocal connections with neuronal elements of the ventral part of the Ncom. The present study supports the hypothesis that the PAGd could be subdivided into discrete cell groups according to their afferent and efferent projections.

Animals↗