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[Tecto-cortical connections in the rat visual system].

T M Zagorul'ko, A V Khachatrian

    Fiziologicheskii Zhurnal SSSR Imeni I. M. Sechenova
    |March 1, 1976
    PubMed
    Summary

    Electric stimulation of the rat

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    Fiziologicheskii zhurnal SSSR imeni I. M. Sechenova·1987

    Area of Science:

    • Neuroscience
    • Visual System Research

    Context:

    • Investigating the rat's visual pathway.
    • Understanding the superior colliculus's role in visual processing.

    Purpose:

    • To identify the neural pathway for visual information from the superior colliculus to the visual cortex in rats.
    • To determine the number of synaptic relays in the rat's tecto-cortical visual system.

    Summary:

    • Electrical stimulation of the superior colliculus in rats elicits evoked potentials (EPs) in the ipsilateral visual cortex.
    • Maximal EP amplitude occurred with stimulation of central superior colliculus layers.
    • Short EP latency (3.2 ms) suggests a single relay in the rat's tecto-cortical visual pathway.

    Impact:

    • Provides evidence for a direct, single-synapse pathway in the mammalian visual system.
    • Offers insights into the evolution of visual processing across vertebrate species.

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