Effect of Levodopa on Speech Dysfluency in Parkinson's Disease.
Hannah ImScott AdamsAnita AbeyesekeraMarcus PietermanGreydon GilmoreMandar JogPublished in: Movement disorders clinical practice (2018)
The results of this study indicate that levodopa medication can have a significant effect on speech dysfluency. The beneficial levodopa effect appears to be related to the severity of the off-medication speech dysfluency. Results did not provide strong support for the excess dopamine theory of stuttering in IWPD. A dualistic model of the effects of dopamine on speech fluency in PD is proposed.