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Special sensory ataxia in Miller Fisher syndrome detected by postural body sway analysis
Author(s) -
Kuwabara Satoshi,
Asahina Mayumi,
Nakajima Masashi,
Mori Masahiro,
Fukutake Toshio,
Hattori Takamichi,
Yuki Nobuhiro
Publication year - 1999
Publication title -
annals of neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.764
H-Index - 296
eISSN - 1531-8249
pISSN - 0364-5134
DOI - 10.1002/1531-8249(199904)45:4<533::aid-ana19>3.0.co;2-h
Subject(s) - proprioception , ataxia , sensory system , cerebellar ataxia , medicine , reflex , muscle spindle , cerebellum , afferent , neuroscience , psychology , audiology , physical medicine and rehabilitation
To investigate whether ataxia in Miller Fisher syndrome (MFS) is caused by loss of proprioception or cerebellar dysfunction, we studied the power spectrum peak of the body sway frequency in 10 MFS patients, and compared the results with those of patients with cerebellar or sensory ataxia. The cerebellar patients had a peak at 2.4 Hz, whereas sensory ataxia patients had a 1‐Hz peak. Nine of the MFS patients had a distinct 1‐Hz peak. Clinical sensory loss or abnormal sensory nerve potentials were present in only 3 patients, whereas soleus H‐reflexes were absent in all the MFS patients. MFS patients have dysfunction of the proprioceptive afferent system, and the special sensory ataxia may be caused by the selective involvement of muscle spindle afferents. Ann Neurol 1999;45:533–536