Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

An isthmo-optic system in a bony fish.

D L Meyer, K Gerwerzhagen, E Fiebig

    Cell and Tissue Research
    |January 1, 1983
    PubMed
    Summary

    This study found a novel isthmo-optic system in bony fish, with cell projections to both eyes. This discovery offers insights into early vertebrate brain evolution and developmental processes.

    Related Concept Videos

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    The influence of creatine and a high glycemic carbohydrate on the growth performance and meat quality of market hogs fed ractopamine hydrochloride.

    Meat science·2011
    Same author

    Effects of dry matter intake restriction on diet digestion, energy partitioning, phosphorus retention, and ruminal fermentation by beef steers.

    Journal of animal science·2007
    Same author

    Serum hormone concentrations relative to carcass composition of a random allotment of commercial-fed beef cattle.

    Journal of animal science·2006
    Same author

    Growth rate, body composition, and meat tenderness in early vs. traditionally weaned beef calves.

    Journal of animal science·2005
    Same author

    A comparative evaluation of conventional and pretargeted radioimmunotherapy of CD20-expressing lymphoma xenografts.

    Blood·2001
    Same author

    High-resolution correlation in apparently monotonous rocks: upper Ordovician Kope Formation, Cincinnati Arch.

    Palaios·2001

    Area of Science:

    • Neuroscience
    • Evolutionary Biology
    • Ichthyology

    Background:

    • The isthmo-optic system, crucial for visual processing, is well-documented in various vertebrates.
    • Its presence and evolutionary trajectory in early fish lineages remain less understood.

    Purpose of the Study:

    • To investigate the existence and characteristics of an isthmo-optic system in a representative bony fish species.
    • To explore the evolutionary implications of observed neural connections in early vertebrate visual pathways.

    Main Methods:

    • Histological examination of the brain in Polypterus, a basal bony fish.
    • Tracing neural projections from the isthmic region to the eyes using cell-specific markers.

    Main Results:

    • Identification of two distinct cell aggregates within the isthmic region projecting to each eye.
    • Demonstration of predominantly crossed connections (contralateral eye) compared to uncrossed (ipsilateral eye) projections.
    • The findings confirm a bilaterally projecting isthmo-optic system in this species.

    Conclusions:

    • This is the first report of an isthmo-optic system in a bony fish, supporting its ancient origins.
    • The observed projection patterns suggest that developmental or evolutionary loss of connections relates to neural parcellation.
    • The study provides evidence for the parcellation theory in the context of vertebrate visual system evolution.

    Related Experiment Videos