Collection: Brain of fishes (Pisces)

Species: Squalus acanthias Linnaeus, 1758    Pisces

Description: Frontal (transverse) celloidin section through a telencephalic hemisphere of the brain of a cartilaginous fish (spiny dogfish) impregnated with silver salts by the Golgi method. Dorsal region of the pallium. The section shows a separately stained short-axon, spineless, stellate nerve cell with a system of dendritic (d) and axonal (ax) arborizations. Note a rich network of axonal collaterals (aхc) and the lack of spines on the dendrites. According to the classification of E. Ramon-Molinera, these neurons belong to a group of highly specialized, idiodendritic cells, which shows a high level of neuronal organization of the brain in some sharks. It is important to note that this kind of cells are found only in the pallium of higher vertebrates (birds and mammals).

Comments: none

Organs: cerebral brain or its part, сentral nervous system

Methods: Neurohistology - Golgi method of silver impregnation of nervous elements

Publications: 

1. Обухов Д.К. Нейронная организация паллиума переднего мозга акулы Squalus acanthyas L // В сб.: : Морфологические основы эволюции, - Л., Наука, 1976. С. 51-57.
2. Обухов Д.К. Нейронная и синаптическая организация дорсального паллиума конечного мозга акулы // В сб.: Труды Института мозга РАМН, М.: РАМН,1985, вып. 14, с. 63-66.

Microscope: Leica DM 6000 with DFC 5000 EC3 camera