Nikolai Petrovich Vesselkin

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The distribution of serotonin(5HT)-immunoreactive cell bodies, nerve fibers and terminals was investigated by light microscopy in the lamprey Lampetra fluviatilis. Twenty-three distinct groups of 5HT neuronal somata were identified from diencephalic to rhombencephalic levels in the brain. The diencephalon contained a subependymal population of(More)
Calbindin-D28K and calretinin are homologous cytosolic calcium binding proteins localized in many retinal neurons from different species. In this report, location of cells immunoreactive to both proteins was investigated in the retina of the lamprey, Lampetra fluviatilis. This organism constitutes one of the older representative vertebrates and possesses a(More)
Projections of the pretectal region to forebrain and midbrain structures were examined in two species of turtles (Testudo horsfieldi and Emys orbicularis) by axonal tracing and immunocytochemical methods. Two ascending gamma-aminobutyric acid (GABA)ergic pathways to thalamic visual centers were revealed: a weak projection from the retinorecipient nucleus(More)
In two species of turtle (Emys orbicularis and Testudo horsfieldi), retrograde and anterograde tracer techniques were used to study projections from the optic tectum to the nucleus rotundus (Rot) and to the dorsal lateral geniculate nucleus (GLd). The ipsilateral Rot received the most massive tectal projections, stemming from numerous neurons located in the(More)
Light-microscopic immunocytochemistry was used to study serotonin (5HT)-containing retinal cells in the lamprey (Lampetra fluviatilis). Observations of sections and flatmounted retinas enabled us to distinguish four principal types of 5HT-immunoreactive neurons, on the basis of the localization of their somata and the arrangement of their processes in the(More)
Crushing or freezing the optic nerve of the viper leads initially to the anterograde degeneration of the optic nerve fibers and to an extensive retrograde demyelination process associated with the degeneration of some retinal ganglion cells. By the 45th postoperative day, regenerating unmyelinated axons can be identified in the damaged region of the optic(More)
The projections from the lateral (LPl), intermediate (LPi) and medial (LPm) subdivisions of the cat lateral posterior nucleus (n. LP) to visual areas 17, the posteomedial (PMLS) and posterolateral (PLLS) lateral suprasylvian and anterior ectosylvian (AEV) were studied using the retrograde labeling technique following concomitant injections of fluorescent(More)
The present review is a detailed survey of our present knowledge of the centrifugal visual system (CVS) of vertebrates. Over the last 20 years, the use of experimental hodological and immunocytochemical techniques has led to a considerable augmentation of this knowledge. Contrary to long-held belief, the CVS is not a unique property of birds but a constant(More)
Argiopin, a low-molecular weight component of the spider Argiope lobata venom, inhibited depolarizations of motoneurones induced by glutamate in experiments on the frog isolated spinal cord, but had no effect on aspartate-induced responses. Half of the blocking effect (ED50) was seen at 7.5 +/- 3.7 x 10(-8) M argiopin. The same concentrations of argiopin(More)