Nuclei and Tracts in the Telencephalon of Crocodiles: Identification and Characterization Using an Organizational Scheme Applicable to Other Reptiles

ABSTRACT The telencephalon of reptiles has been suggested to be the key to understanding the evolution of the forebrain. Nevertheless, a meaningful framework to organize the telencephalon in any reptile has, with rare exception, yet to be presented. To address this gap in knowledge, the telencephalo...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of comparative neurology (1911) 2024-07, Vol.532 (7), p.e25659-n/a
1. Verfasser: Pritz, Michael B.
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:ABSTRACT The telencephalon of reptiles has been suggested to be the key to understanding the evolution of the forebrain. Nevertheless, a meaningful framework to organize the telencephalon in any reptile has, with rare exception, yet to be presented. To address this gap in knowledge, the telencephalon was investigated in two species of crocodiles. A variety of morphological stains were used to examine tissue in transverse, horizontal, and sagittal planes of sections. Besides providing a description of individual nuclei, brain parts were organized based on two features. One was related to two fixed, internal structures: the lateral ventricle and the dorsal medullary lamina. The other was the alignment of neurons into either layers, cortex, or not, nucleus. Viewed from this perspective, all structures, with limited exceptions, could be accurately placed within the telencephalon regardless of the plane of section. Furthermore, this framework can be applied to other reptiles. A further extension of this scheme suggests that all structures in the telencephalon could be grouped into one of two categories: pallial or basal. Schematic illustration of crocodile telencephalon shows subdivisions not drawn to scale. Division of structures into pallial and basal regions are marked by arrows. Pallial areas include cortex, pallial thickening, and dorsolateral area. Basal areas are ventrolateral area, accumbens, anterior olfactory nucleus, olfactory tuberculum, and the nucleus of the diagonal band.
ISSN:0021-9967
1096-9861
1096-9861
DOI:10.1002/cne.25659