TOPOGRAPHY OF THE FETAL PONS IN WEEKS 1622 OF PRENATAL ONTOGENESIS

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Background. The fetal brain attracts considerable and constant interest from the point of view of its neuroanatomy and physiology. The hindbrain and its departments in the prenatal period are most created. Aim. Obtaining new data about topography of the brain pons and its relationship with structures of a skull became the purpose of the real research. Material and Methods. The research is executed on material of 40 fetus of 16-22 weeks of development without congenital malformations of a brain. Material has been investigated by method of macro-microscopic preparation and a method of gistotopographical cuts in three mutually perpendicular planes. Cuts were coloured according to Van Gieson and subjected microscopy. Results and Discussion. Results of a research have shown that the most informative for studying of this department of a brain are horizontal cuts. On horizontal cuts at the level of a middle part of the pons (external reference points - the middle of a frontal sinus and the upper border of the auricle) the distance from the brain pons to a frontal bone has made 33.69±0.5 mm on the left side and 33.92±0.5 mm on the right. The distance to the temporal bone was equal to 18.67±0.5 mm at the left and 18.73±0.5 mm on the right, to the occipital bone of 24.1±0.5 mm and 24.33±0.5 mm respectively. Sagittal and frontal cuts allow to receive a number of additional data on pons neuroanatomy.