Muhammad Alamgir Rana, Saqib Sohail, Muhammad Amin, Fasih Nisar, Atiya Mubarik Khalid.
A morphometric study of vascular patterns in primary auditory area of human brain.
Pak J Med Health Sci Jan ;6(1):16-9.

Objectives: To investigate the blood supply of primary auditory area to provide comprehensive knowledge of morphology and variations of cerebral vessels supplying this area and to illuminate the collateral vessels to this area. Subject and methods: A total number of 50 cerebral hemisphees were obtained from cadavers and put in 10% formalin for one week so as to fix them. A mixture of gelatin and Indian ink of various colours was injected in anterior cerebral artery, middle cerebral artery and posterior cerebral artery separately. Measurement of length and diameter of each vessel was made by digital vernier caliper. Results: The middle cerebral artery is the sole supply to the primary auditory area while the posterior cerebral artery appeared as collateral artery to the primary auditory area. Conclusion: Variations of arteries supplying the primary auditory area already mentioned were noted frequently and significantly. Variations in appearance were noted as smooth and nodular. Variations regarding course were noted as straight or tortuous. Modularity and tortuous course could explain the high incidence of cerebrovascular accidents in mankind. The presence of collateral vessels to this area can modify the outcome of cerebral infarcts.

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