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Angiographic Examination of the Vertebral Artery at the Atlantoaxial Joint during Head Rotation Isao TAKAHASHI 1,2 , Sadao KANEKO 1 , Katsuyuki ASAOKA 1 , Tatsuo HARADA 1 1Department of Neurosurgery, Iwamizawa Municipal General Hospital Keyword: Vertebral artery , Heay rotation , Angiography , Atlantoaxial joint pp.749-753
Published Date 1994/8/10
DOI https://doi.org/10.11477/mf.1436900888
  • Abstract
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Stenosis or occlusion of the vertebral artery at the atlantoaxial joint associated with head rotation is gener-ally considered an uncommon cause of vertebrobasilar insufficiency. This rotational contralateral (to the face) vertebral artery occlusion is considered to be a “phy-siological phenomenon”. The purpose of the present article is to investigate whether stenosis or occlusion of the vertebral artery at the atlantoaxial joint really occurs with head rotation.

The authors performed vertebral angiography both in the neutral position and with contralateral rotation of the head (about 80-90 degrees) on 39 patients (44 ver-tebral arteries), who didn't have any disease of the cer-vical region or of the posterior cranial fossa. The au-thors discussed the angiographic findings concerning the vertebral artery at the atlantoaxial joint during con-tralateral rotation of the head.

In some cases a vertebral artery was stretched with head rotation. However occlusion or stenosis of the ver-tebral artery was never found to occur at the atlantoax-ial joint level in any of the cases. This result indicates that rotational vertebral artery occlusion is not a “phy-siological phenomenon”. There may be many other de-velopmental and degenerative factors contributing to this rotational occlusion, such as atherosclerosis, kink-ing, and tortuosity of the vertebral artery, hyperos-teosis, tightness of the paravertebral muscle, stenosis of transverse foramen and the depth of the vascular groove of the atlas.


Copyright © 1994, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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