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Related Experiment Videos

Corrosion casts of the temporal bone.

G E Tremble

    The Journal of Otolaryngology
    |August 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    The bony labyrinth, including the semicircular canals and cochlea, is fully developed at birth. This study measured these structures in infant and adult temporal bones.

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    Area of Science:

    • Anatomy
    • Otolaryngology
    • Developmental Biology

    Background:

    • The bony labyrinth is a complex structure within the temporal bone housing the organs of hearing and balance.
    • Understanding the developmental trajectory of the bony labyrinth is crucial for diagnosing congenital conditions and interpreting imaging studies.

    Purpose of the Study:

    • To compare the size of the bony labyrinth in infant specimens with that of adult specimens.
    • To determine if significant growth occurs in the bony labyrinth after birth.

    Main Methods:

    • Dried human temporal bones from infants and adults were utilized.
    • Fusible metal was injected into the bony labyrinth.
    • Surrounding bone was dissolved using weak acid to expose the labyrinthine structures.

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  • Measurements of the semicircular canals and cochlea were taken and compared between age groups.

    • Main Results:

    • The bony labyrinth, encompassing the semicircular canals and cochlea, demonstrates adult-like dimensions in infants.
    • No significant size difference was observed between the bony labyrinth of infants and adults.

    Conclusions:

    • The bony labyrinth reaches its full size early in development, likely before or at birth.
    • Postnatal development does not significantly alter the overall dimensions of the bony labyrinth.