Children with classic galactosemia are at risk for motor speech disorders 
resulting from disruptions in motor planning and programming (childhood apraxia 
of speech or CAS) or motor execution (dysarthria). In the present study of 33 
children with classic galactosemia, 21% were diagnosed with CAS, 3% with ataxic 
dysarthria, and 3% with mixed CAS-dysarthria. Voice disorders due to laryngeal 
insufficiency were common in children with dysarthria and co-occurred with CAS. 
Most (58%) of the children with classic galactosemia had decreased 
respiratory-phonatory support for speech, and 33% had disturbed vocal quality 
that was indicative of cerebellar dysfunction. Three children, two diagnosed 
with CAS and one not diagnosed with a motor speech disorder, had vocal tremors. 
Treatment of voice dysfunction in neurogenic speech disorders is discussed.