[Distribution of GABA-immunoreactive elements in the reptile amygdaloid complex]. / Issledovanie raspredeleniia GAMK-immunoreaktivnykh élementov v amigdaloidnom komplekse reptilii.

GABA-immunoreactive (GABA-I) elements (neuronal somata and neuropile) are detected in turtle Emys orbicularis and lizard Ophysaurus spodus in all structures of ventral and dorsal parts of amygdaloid complex (AC) considered as phylogenetic more ancient and younger, respectively by means of the immunohistochemical method. Their maximal quantity in the ventral section of AC is found in the lateral region, lesser--in the ventral, central and medial regions. Besides in lizards a specialized laminar distribution of GABA-I elements in n. sphaericus is observed. GABA-I neurons are also detected in structures of dorsal part in turtles and lizards against the background of the immunopositive neuropile of a moderate density. It is supposed that GABA-ergic innervation of AC is liable to considerable variations in connection with taxonomic, ecological and other factors.

[Participation of anterior thalamic nuclei in the visual afferentation of the hippocampus in the rat]. / Uchastie iader perednego talamusa v zritel'noi afferentatsii gippokampa u krys.

The localization of retinofugal projections in the rat studied by means of the autoradiography and HRP methods coincides with the site of sources of direct hippocampal projections in the anterior thalamic nuclei found on the basis of the HRP retrograde axonal transport. The data obtained firstly represent the anterodorsal and anterolateral thalamic nuclei as a main thalamic source of hippocampal visual afferents in mammals and permit reconstructing the short visual input to the hippocamp, i.e. the retino-thalamo-hippocampal pathway.

[Retinopetal neurons and fibers in the lamprey]. / Retinopetal'nye neirony i volokna u minogi.

The structure of the retinopetal system was studied in lampreys (Lampetra fluviatilis) using the HRP method. Preliminary chemical destruction of the retina or the optic nerve transsection ceased the anterograde axonal transport in the retinofugal fibres, and permitted observing the centrifugal visual projections without marking the retinofugal fibres. The cells of retinopetal system were found in the periventricular tegmental zone and in the reticular zone of mesencephalon. Retinopetal fibres followed the axial optic tract.