PMID: 1214047Jan 1, 1975Paper

The telencephalon of the sea catfish Galeichthys felis

Journal für Hirnforschung
G C Morgan

Abstract

The sea catfish is a relatively abundant teleost fish. Its placement on the phylogenetic scale remains in question, although its brain resembles grossly those of some of the other teleosts which also possess pedunculated olfactory bulbs. The forebrain of Galeichthys felis consists of two hemispheres which lack lateral ventricles. They are joined at the midline by a thin membrane ventromedially and by the hippocampal and anterior commissures. The telencephalic hemispheres are overlaid by a single, ventrolaterally attached membrane which is continuous rostrally with the roofs of the olfactory ventricles. Six basic nuclear regions are evident in the telencephalon of the sea catfish: a dorsomedial, a ventromedial, a ventral, a lateral, a dorsal and a central. Dorsomedially, the primordial hippocampal formation is divided into an anterior continuation, a primordial dentate gyrus, a primordial cornu ammonis and a primordial subiculum. Ventromedially, the precommissural septum consists of the medial septal nucleus (pars dorsalis and pars ventralis), the lateral septal nucleus and the nuclei of the hippocampal and anterior commissure. Ventrally, the medial and the lateral zones and the medial island constitute the tuberculum olfactoriu...Continue Reading

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