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A rare genetic autosomal recessive cerebellar ataxia disease with characteristics of slowly progressive spinocerebellar ataxia developing during childhood, manifesting with gait and limb ataxia, postural tremor, dysarthria, sensory alterations (for example decreased vibration sense), eye movement anomalies (such as nystagmus, saccadic pursuit, oculomotor apraxia), upper and lower limb fasciculations and hyperreflexia with Babinski signs. Brain imaging reveals cerebellar, pontine, vermian and medullar atrophy. There is evidence the disease is caused by compound heterozygous mutation in the TPP1 gene on chromosome 11p15.
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