Fig 3 - uploaded by Margarita Gennadievna Belekhova
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Tectal neurons immunoreactive to CaBPr with apical dendrites terminating in superficial regions of retinorecipient layer. (a) PV, (b), (c) CB, (d) CR. Apical dendrites of SGC neurons (a, b, c), SGFSi (c) and SGP (d) are shown by arrows. Designations: see List of abbreviations. Scale in μm: 50.
Source publication
Using immunohistochemistry and a tracer technique we investigated the distribution in the optic tectum of turtles (Emys orbicularis and Testudo horsfieldi) of the calcium-binding proteins (CaBPr) parvalbumin (PV), calbindin (CB) and calretinin (CR) before and after labeling of the nucleus rotundus (Rot) with horseradish peroxidase. The optic tectum...
Contexts in source publication
Context 1
... of the superficial SGFSe (Figs. 1b-1d). Particularly numerous are the CB-ir neuronal dendrites often united into bundles and residing in the underly- ing SGFSi layer (Figs. 1b and 2b). The superficial SGFSe sublayers comprising the intensely immu- noreactive neuropil are reached by the dendrites of the sparse PV-, CB-, and CR-ir SGC neurons (Figs. 3a-3c) as well as the dendrites of the PV-, CB-, and CR-ir neurons situated in other tectal layers (Figs. 2b, 3c, and ...
Context 2
... μm 2 ). They are multi- shaped (multipolar, spindle-shaped, rounded, tri- angular, pyriform) and have the labeled, often ram- ified dendritic processes. Their synaptic endings are observed in SGFSi (Figs. 5d-5f ); sometimes the dendrites can be traced throughout SGFS reaching most superficial SGFSe layers (1-2) with heavily labeled CB-ir neuropil (Figs. 3b, 3c). Among the CB-ir neurons no cells similar to the largest PV-ir neurons were ...
Citations
... In birds, the tectorotundal pathway contains multiple parallel channels, deriving from different types of tectal neurons [25,26] and processing different aspects of visual information [27,28]. We found that tectorotundal projection neurons in birds and reptiles expressed PV and CB [29,30]. Thus, a heterogeneous distribution of РV and СВ immunoreactivity in the avian and reptilian Rot may relate to different chemospecificity of parallel tectorotundal channels. ...
