Topological analysis of the brain stem of the crossopterygian fish Latimeria chalumnae

The Journal of Comparative Neurology
J W Kremers, Rudolf Nieuwenhuys

Abstract

The ventricular sulcal pattern and the cellular structure of the brain stem of the single surviving crossopterygian species Latimeria chalumnae have been studied in transversely cut Nissl, Klüver-Barrera and Bodian stained serial sections. Five longitudinal sulci, the sulcus medianus inferior, the sulcus medianus superior, the sulcus intermedius ventralis, the sulcus limitans and the sulcus intermedius dorsalis could be delimited. The latter three of these sulci are confined to the rhombencephalon. The walls of the mesencephalon also display some longitudinal grooves, but none of these could be traced into continuity with any of the rhombencephalic sulci. Although the neuronal perikarya in many places show a diffuse arrangement, 27 cell masses could be delineated; eight of these are primary efferent nuclei, seven are primary afferent centers, seven nuclei are considered as components of the reticular formation, and the remaining five cell masses may be interpreted as "relay" nuclei. In order to study the zonal pattern of the brain stem, this structure was subjected to a topological analysis (cf., Nieuwenhuys, '74, and fig. 16). This analysis yielded the following results. The sulcus limitans divides the greater part of the rhom...Continue Reading

References

Oct 1, 1979·The Journal of Comparative Neurology·F Thors, R Nieuwenhuys
Aug 15, 1977·The Journal of Comparative Neurology·R G Northcutt
Oct 7, 1977·Anatomy and Embryology·R NieuwenhuysC van Huijzen
Feb 1, 1976·The Journal of Comparative Neurology·R OpdamR Nieuwenhuys
Feb 1, 1976·The Journal of Comparative Neurology·P Opdam, R Nieuwenhuys
Feb 1, 1976·The Journal of Comparative Neurology·W J Smeets, R Nieuwenhuys
Aug 1, 1974·The Journal of Comparative Neurology·W L Cruce, R Nieuwenhuys
Aug 1, 1974·The Journal of Comparative Neurology·R Nieuwenhuys
Jun 1, 1972·The Journal of Comparative Neurology·R Nieuwenhuys

❮ Previous
Next ❯

Citations

Oct 7, 1977·Anatomy and Embryology·R NieuwenhuysC van Huijzen
Oct 1, 1980·The Journal of Comparative Neurology·J R Rosiles, R B Leonard
Oct 1, 1979·The Journal of Comparative Neurology·F Thors, R Nieuwenhuys
Jan 10, 1983·The Journal of Comparative Neurology·R Nieuwenhuys, P L Oey
Jan 1, 1994·The Journal of Comparative Neurology·Y F Heijdra, R Nieuwenhuys
Jun 1, 2021·Brain, Behavior and Evolution·Rudolf Nieuwenhuys

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.