[The specific features of the anatomical structure of the XXXX (an anatomical and topographical study)].

@entity5487 @entity389
UNASSIGNED: The objective of the present work was to study syntopy of the @entity389 using block-preparations of the posterior cranial fossa, variants of its branching-off from the vertebro-basiliar basin (VBB), and peculiar features of its anatomical structure. A total of 12 block-preparations of the posterior cranial fossa were available for the investigation. They were preliminarily stained with red latex and fixed in a three-point system. These procedures were followed by retrosigmoid craniotomy, opening of dura mater in the supero-lateral part of the cerebellomedulllary cistern, traction of the cerebellum, and blunt separation of the basiliar artery (BA). Variants of @entity5487 from @entity5487 were studied. It was shown that the @entity5487 in 100% of the cases. The latter artery formed a loop in 14% of the cases (3 ears). The average diameter of the labyrinth artery was 0.32 mm and its mean area 0.06 sq.cm. The @entity389 branched off from the posterior para-stem segment of the @entity5487 in 42.6% of the cases (9 ears), and from the anterior para-stem segment of @entity5487 in 14.2% of the cases (3 ears). Within the conventional   rhombus  , the @entity389 was straight in 76.2% of the cases (16 ears) and arc-shaped in 23.8% (4 ears).
