[The internal thoracic blood vessels (internal thoracic arteries and veins) and their practical significance].

Internal thoracic blood vessels (A. et Vv. thoracicae internae) are parietal vessels of the thoracic anterior wall.

Arcus palmaris superficialis.

The purpose of this study was to investigate in depth the arcus palmaris superficialis in order to evaluate two different views of the superficial blood supply of the palm; the classical view which puts emphasis on the existence of the arcus palmaris superficialis and a new interpretation in which the arcus palmaris superficialis is not mentioned. Fifty upper extremities from fresh human cadavers of both sexes, age range 20-80, were studied. The observations showed that the arcus palmaris superficialis was present in 97% of the cases, that in 85% of the cases it anastomosed with different arteries originating from the radial artery.

[The posterior inferior cerebellar artery].

The posterior inferior cerebellar artery has a curved course in the region of the medulla oblongata. Besides its frequent individual variations, this vessel exhibits three morphological types: in type 1 (the commonest type, i.e.

[Postnatal development and anatomical relationship of the maxillary sinus].

In children, the maxillary sinus is pyramidal in shape. The apex of the pyramid looks forward, and the base looks backwards. The maxillary sinus has three walls--the superior, the medial and the inferior.