Anatomic and morphometric examination of auditory ossicles in sheep

Area of Science:

• Anatomy
• Otolaryngology
• Comparative Morphology

Background:

• Accurate morphometric data of auditory ossicles is crucial for middle ear surgical procedures.
• Understanding the relationships between auditory ossicles aids in surgical planning and training.

Purpose of the Study:

• To measure the morphometry of sheep auditory ossicles (malleus, incus, stapes).
• To analyze the interrelationships between these ossicles in sheep.
• To assess the suitability of sheep auditory ossicles for human ear surgery training.

Main Methods:

• Examination of 100 auditory ossicles (50 each of malleus, incus, stapes) from 50 Akkaraman sheep.
• Utilized a trinocular stereo microscope for detailed morphometric analysis.
• Performed 19 distinct morphometric measurements and correlation analyses.

Main Results:

• Identified similarities between sheep and human auditory ossicle measurements, including malleus and incus lengths, and stapes base width.
• Found significant positive correlations between various parts of the malleus, incus, and stapes.
• Established specific correlations between stapes components and the intercrural foramen.

Conclusions:

• Sheep auditory ossicles exhibit anatomical similarities to human ossicles.
• The morphometric data and correlations support the use of sheep auditory ossicles in surgical training.
• Sheep ossicles present a viable model for practicing human ear surgery.