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Vertebrobasilar ischemia revealed atlantoaxial instability in a patient who had cervical spine trauma 2 years previously. Vertigo was elicited by rotation of the head to the right; angiography demonstrated the occlusion of the left vertebral artery in the same position. The patient recovered totally after surgical fusion of the atlantoaxial joint.
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Vinchon et al. (1995) studied this question.
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