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Extracranial and Intracranial Structure

Iain M. S. Wilkinson, BSc, MD, MRCP

Arch Neurol. 1972;27(5):392-396.

Abstract
As the vertebral artery enters the skull, its adventitia and media undergo a significant reduction in thickness, associated with gross diminution or total loss of elastic fibers in these two layers of the artery wall. This transformation is most marked in the last 0.5 cm extradurally, but is not complete until about 0.5 cm beyond the point of dural perforation.

Author Affiliations
Manchester, England

From the Department of Neurology, Royal Infirmary, Manchester, England.

Footnotes
Accepted for publication April 28, 1972.

Reprint requests to Department of Neurology, Royal Infirmary, Manchester 13, England.

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