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Related Experiment Video

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Horizontal Whole Mount: A Novel Processing and Imaging Protocol for Thick, Three-dimensional Tissue Cross-sections of Skin
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Histological data: Hollard and Davison (1971).

V Hollard, M C Davison

    Journal of the Experimental Analysis of Behavior
    |January 1, 1978
    PubMed
    Summary

    Histological analysis revealed electrode placements in pigeons were primarily in the paleostriatum, not the intended ectostriatum. This finding impacts interpretations of self-stimulation experiments in avian brain research.

    Area of Science:

    • Neuroscience
    • Histology
    • Animal Behavior

    Background:

    • Previous research assumed electrode placement in the avian ectostriatum.
    • Histological verification is crucial for interpreting experimental results.

    Purpose of the Study:

    • To present histological data verifying electrode tip locations in pigeons.
    • To clarify the precise anatomical sites used in self-stimulation experiments.

    Main Methods:

    • Pigeons (93, 95, 119) were sacrificed post-experimentation.
    • Brain sections (50 microns) were processed and visualized photographically.
    • Electrode tip positions were determined via histological analysis.

    Main Results:

    • Electrode tips for pigeons 93 and 119 were located in the paleostriatal complex.

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  • Precise localization was not possible for pigeon 95 due to damaged sections.
  • Subsequent studies confirmed electrode placements often target the paleostriatum, not the ectostriatum.

    • Conclusions:

    • The study corrects assumptions about electrode placement in avian neurostimulation research.
    • Paleostriatal electrode placements were associated with sustained self-stimulation.
    • Ectostriatal placements yielded low or unstable self-stimulation rates, suggesting functional differences.