Developmental stuttering (DS) may be related to the extrapyramidal mot
or system and shares many clinical similarities with Tourette's syndro
me (TS), which is widely believed to be associated with extrapyramidal
dysfunction. Twenty-two stutterers were examined for neuropsychiatric
features commonly seen in TS, including ties, obsessive-compulsive be
haviors (OCB), and attention deficit disorders. Eleven stutterers disp
layed motor ties, and symptoms of OCB were observed at rates similar t
o those seen in persons with TS. Few stutterers demonstrated significa
nt attentional deficits. Findings are consistent with models suggestin
g extrapyramidal involvement in DS and raise the possibility that DS a
nd TS are pathogenetically related. (C) 1998 Academic Press.