spasmodic dysphonia
noun [ U ] medical specialized uk/spæzˌmɒd.ɪk dɪsˈfəʊn.i.ə/ us/spæzˌmɑːd.ɪk dɪsˈfoʊ.ni.ə/
痉挛性发音困难
a condition in which someone has difficulty speaking because of spasms (= muscles suddenly becoming tighter in an uncontrolled way)