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Occlusion of these penetrating branches to one side of the medial medulla may result in a pattern of deficits characteristic of the medial medullary syndrome ( Dejerine syndrome. On the other hand, occlusion of the ASA may result in bilateral deficits reflecting damage to both pyramids, both medi…

Occlusion of these penetrating branches to one side of the medial medulla may result in a pattern of deficits characteristic of the medial medullary syndrome ( Dejerine syndrome. On the other hand, occlusion of the ASA may result in bilateral deficits reflecting damage to both pyramids, both medial lemnisci, and both of the hypoglossal nuclei or their exiting roots. Vascular insufficiency of the PICA territory (or blockage of one vertebral artery) gives rise to a characteric