Research Article| Volume 324, ISSUE 1-2, P109-112, January 15, 2013

Acoustic impairment is a distinguishable clinical feature of Asidan/SCA36

Published:November 09, 2012DOI:



      To investigate acoustic function of Asidan/spinocerebellar ataxia type 36 (SCA36) in which sensorineural hearing loss may be found as one of extracerebellar symptom that can be a distinguishable feature from other degenerative ataxias.


      Acoustic function in the groups of normal control (n=31), Asidan/SCA36 (n=13), cortical cerebellar atrophy (CCA, n=28), multiple system atrophy of cerebellar predominance (MSA-C, n=48), SCA31 (n=4), and other forms of SCAs (n=14) was evaluated by pure tone average (PTA) calculated by the results of audiogram and brainstem auditory evoked potentials (BAEPs).


      PTA was significantly decreased in Asidan/SCA36 in comparison to normal control and other ataxic groups, but not significant within other ataxic groups and normal control. In comparison to other groups, Asidan/SCA36 showed a constant depression at 7 different frequencies in audiogram, especially at 4000 and 8000 Hz. BAEPs in 2 Asidan/SCA36 cases suggested possible involvement in the inner ear or the peripheral part of the auditory system. PTA in Asidan/SCA36 cases significantly correlated with their severity of ataxia.


      In addition to signs for motor neuron involvement, acoustic impairment in Asidan/SCA36 is another characteristic clinical feature that is distinguishable from other forms of SCAs.


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