A rare form of stuttering with a psychological origin (conversion disorder), rather than neurological damage. It often has an abrupt onset associated with emotional trauma or stress, and is characterized by atypical dysfluencies that persist regardless of the speaking situation; patients may exhibit a relative lack of anxiety or concern about their speech symptoms, reflecting the emotional (not organic) etiology. Careful evaluation is required to rule out neurologic causes and confirm the psychogenic nature.
Almada, A., Fonseca, M. J., Guimarães, L., Amstalden-Mendes, L., & Maximino, L. P. “Feeding, Swallowing and Communication in Infants with Cleft Lip and Palate.” Paediatria Croatica 65, no. 1 (2021).