问题：
[名词解释] medial medullary syndrome
问题：
[名词解释] pure sensory stroke
问题：
[名词解释] syndrome 0f anterior cerebral artery
问题：
[名词解释] syndrome of the stem of middle cerebral artery
问题：
[名词解释] dysarthric-clumsy hand syndrome
问题：
[名词解释] syndrome of posterior cerebral artery
问题：
[名词解释] vertebral-basilar syndrome
