P300 Event-Related Potentials in Stutterers Pre- and Post-Treatment

Claudia Andrade, Fernanda Chiarion Sassi, Carla Gentile Matas, Ivone Ferreira Neves and Vanessa de Oliveira Martins

This study investigated the relationship between stuttering amelioration and cerebral activity. P300 event-related potentials were obtained pre and post-treatment in order to verify changes in signal amplitude and in the latency between waves. Three adult males, all stutterers, aged 20 to 31 years, volunteered to participate in the present study. Results indicate a significant positive correlation between the reduction in the percentage of stuttered syllables and the improvement in wave amplitude for the right ear, i.e. stutterers can exhibit different patterns of interhemispheric activity with a tonal P300 task after undergoing a fluency-enhancing program.