Trochlear-oculomotor nerve interactions in Xenopus laevis tadpoles: a temporal study

The Journal of Experimental Zoology
R F Fangboner

Abstract

When the trochlear nerve (NIV), which innervates the superior oblique muscle (SOM), is crushed or cut at stages 48-49 in Xenopus tadpoles, fibers from the oculomotor nerve (NIII) sprout and invade the SOM. The maximal percentage of specimens having at least one oculomotor nerve fiber on the SOM on a given day increased from 9.1% following a single crushing of NIV to 84.2% following three successive severings of NIV and the average number of silver-impregnated NIII fibers per specimen increased from 0.23 +/- 0.16 (mean +/- S.E.M.) in the single-crush experiment to 7.35 +/- 1.33 in the triple-cut experiment. This increase directly reflects the delay in the return of NIV. As NIV returns to the SOM, a portion of the inappropriate innervation is lost; while another portion appears to be stable and is in evidence 90 days after a single sectioning of NIV. The more rapidly NIV returns to the SOM, the more complete is the displacement of the NIII fibers. This suggests that the association between NIII and the SOM changes with time so that easy displacement of the inappropriate innervation is likely only when the reinnervation by the appropriate nerve fibers is rapid.

References

Apr 26, 1977·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·B R Genat, R F Mark
Mar 1, 1978·Brain : a Journal of Neurology·J E O'Connell
Jun 20, 1975·Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character·D T Cass, R F Mark
Jun 20, 1975·Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character·M C Prestige, D J Willshaw
Mar 10, 1978·Brain Research·G S Sohal, T A Weidman
Apr 15, 1977·Brain Research·T A Weidman, G S Sohal
Jul 15, 1977·The Journal of Comparative Neurology·D Ehrlich, R F Mark
Sep 1, 1977·Nature·P Grobstein, C Comer
Jan 1, 1976·Journal of Neurophysiology·E Frank, J K Jansen
Jan 1, 1972·Zeitschrift Für Anatomie Und Entwicklungsgeschichte·G D Das, R J Hine
May 1, 1974·British Medical Bulletin·R F Mark
Oct 15, 1974·The Journal of Comparative Neurology·R F Fangboner, J W Vanable
Dec 1, 1974·The Journal of Experimental Zoology·J E Turner, M Singer
Apr 5, 1972·Nature: New Biology·R M GazeM J Keating
Jun 22, 1972·Brain Research·M C Prestige, M A Wilson
Dec 1, 1971·The Journal of Experimental Zoology·L M Grimm
Apr 1, 1971·Quarterly Journal of Experimental Physiology and Cognate Medical Sciences·M A Wilson
May 1, 1968·Journal of Neurophysiology·J Cronly-Dillon
Oct 1, 1952·The Journal of Comparative Neurology·A VAN HARREVELD
Aug 1, 1953·The Anatomical Record·E P SAMUEL
Nov 1, 1956·The Journal of Comparative Neurology·N DEUPREE, R W SPERRY
Jul 1, 1950·The Australian Journal of Experimental Biology and Medical Science·H HOFFMAN

❮ 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.

© 2021 Meta ULC. All rights reserved