What is the Arnold-Chiari syndrome?
['Arnold Chiari syndrome is a condition characterized by herniation of the cerebellar tonsils through the foramen magnum.', 'The Arnold-Chiari malformation is very rare hindbrain abnormalities characterized by herniation of the hindbrain through the foramen magnum.', 'The origin of Arnold-Chiari syndrome is connected with narrowness in the posterior fossa, particularly with narrowing of the arachnoid spaces.', 'Arnold-Chiari Syndrome I is a malformation of the cervicomedullary junction, manifesting usually with downbeat nystagmus, palsy of the caudal cerebral nerves, headache, and vertigo.']
['Arnold Chiari syndrome is a condition characterized by herniation of the cerebellar tonsils through the foramen magnum, manifesting usually with downbeat nystagmus, palsy of the caudal cerebral nerves, headache, and vertigo.']
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