[Experimental anatomic basis for tentorium cerebelli incisions].

The histotopographic features of the structure of the upper and lower layers of the tentorium cerebelli and the range of the age and individual variability of its dimensions were studied on 152 preparations. The main neuro-vascular structures are located in the lower layer of the tentorium. Two extreme forms of the structure of the neuro-vascular bundle are distinguished: main-line and spreading. Various localizations of the tentorial bundle are described: lateral, medial, and separate bilateral. A zone of the tentorium cerebelli that is relatively poor in vessels and nerves and comparatively favourable for incision is established. Measurements of the tentorium cerebelli according to age and sex made it possible to determine the optimum length of its incisions.