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Medial medullary syndrome : ウィキペディア英語版 | Medial medullary syndrome
Medial medullary syndrome, also known as inferior alternating syndrome, hypoglossal alternating hemiplegia, lower alternating hemiplegia,〔(【引用サイトリンク】title=Atlas of Microscopic Anatomy: Section 17 - Central Nervous System. Plate 17.330 Medulla Oblongata )〕 or Dejerine syndrome, is a type of alternating hemiplegia characterized by a set of clinical features resulting from occlusion of the anterior spinal artery. This results in the infarction of medial part of the medulla oblongata. ==Pathophysiology== The infarction leads to death of the ipsilateral medullary pyramid, the medial leminiscus, and the hypoglossal nerve fibers that pass through the medulla. The spinothalamic tract is spared because it is located more laterally in the brainstem and is not supplied by the anterior spinal artery, but rather by the vertebral and posterior inferior cerebellar arteries. The trigeminal nucleus is also spared, since most of it is higher up in the pons, and the spinal part of it found in the medulla is lateral to the infarct.
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