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Dendrite bundles, central programs and the olfactory bulb.

M E Scheibel, A B Scheibel

    Brain Research
    |September 23, 1975
    PubMed
    Summary
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    Dendrite bundles in the mammalian neonate olfactory bulb may store innate behavioral programs. These structures are hypothesized to control early behaviors like nipple search and suckling.

    Area of Science:

    • Neuroscience
    • Developmental Biology
    • Olfactory System Research

    Background:

    • Long secondary dendrites of mitral cells in the mammalian neonate olfactory bulb exhibit extensive interweaving and coiling, forming characteristic dendrite bundles.
    • A correlation has been observed between the development of dendrite bundles in various central nervous system areas and the emergence of specific output performances.
    • This suggests dendrite bundles might act as repositories for central programs that shape neural responses.

    Purpose of the Study:

    • To further investigate the hypothesis that dendrite bundles in the olfactory bulb serve as repositories for central programs.
    • To explore potential mechanisms by which these bundles influence early behaviors in neonates.

    Main Methods:

    • Observational analysis of mitral cell dendrite morphology in mammalian neonates.

    Related Experiment Videos

  • Correlation studies between dendrite bundle development and behavioral performance.
  • Hypothetical modeling of neural mechanisms within the olfactory bulb.

    • Main Results:

    • Mitral cell dendrites in the neonate olfactory bulb are well-developed and form bundles.
    • The presence of these bundles is provisionally linked to the development of specific neural output performances.
    • Mechanisms are proposed for how encoded programs within dendrite bundles could trigger and control neonatal behaviors.

    Conclusions:

    • Dendrite bundles in the olfactory bulb are proposed to contain and manage innate behavioral programs.
    • These structures may play a crucial role in controlling essential early life functions such as nipple search and suckling in neonates.
    • The specialized environment within these bundles could facilitate the encoding and execution of rudimentary appetitive programs.