Type of Article:  Original Research

Volume 7; Issue 1.1 (January 2019)

Page No.: 6113-6118

DOI: https://dx.doi.org/10.16965/ijar.2018.417


Mamatha Y *1, Trisha.K.R  2, Vishal Kumar 3.

*1 Associate Professor, Department of Anatomy, Koims, Madikeri, Karnataka, India.

2 Medical Student, Koims, Madikeri, Karnataka, India.

3 Professor, Department of Anatomy, Koims, Madikeri, Karnataka, India.

Correspondance Address: Dr. Mamatha Y, Associate Professor, Department of Anatomy, Koims, Madikeri, Karnataka, India. Phone No: 09448669850 E-Mail: drmamthay@gmail.com


Background: The internal acoustic canal (IAC), is a bony canal within the petrous portion of the temporal bone that transmits the VII and VIII cranial nerves and labyrinth vessels. Quantitative and morphometric assessment of the internal auditory canal (IAC) are essential to establish the anatomical bases for microsurgery of the cerebellopontine angle and acoustic neuroma, which may produce bone changes and is an important intracranial pathology.

Materials and Methods: The present study was conducted on 40 adult temporal bone of adult skulls.The impression of IAM/IAC was taken using impression material Poly Vinyl Silioxane, then the measurement were taken on dry cast using digital vernier calliper. The obatined data was tabulated and analysed statistically.

Results: The mean height and width of right and left side of IAM at porous end, middle portion and fundus end was 3.56 & 3.86mm & 3.48 & 4.13 mm, 3.52 & 3.37mm & 3.44 & 3.47mm, 3.26mm & 3.08mm, 3.36 & 3.19mm respectively. The Mean superior length & inferior length on right side was 9.89 & 8.43mm & 9.94 & 8.59 mm on left side respectively. On comparing the parameters between right and left sides by using unpaired t test, it was found to be statistically insignificant.

Conclusion: The present study presents a baseline data on morphometric measurements of IAM of dry adults skulls among south Indian population, also confirms that there is a differences in dimensions of IAM among different races and regions and thus emphasises need to have knowledge of normal data of different population.

Key words: Temporal Bone, Variant, Meatus, Facial, Acoustic, Neuroma.


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Cite this article: Mamatha Y, Trisha.K.R, Vishal Kumar. ANTHROPOMETRY OF INTERNAL ACOUSTIC MEATUS IN DRY ADULT HUMAN SKULL USING CASTING METHOD. Int J Anat Res 2019;7(1.1):6113-6118. DOI: 10.16965/ijar.2018.417