Individual differences in neural regions functionally related to real and imagined stuttering  

Oleh:

Wymbs, Nicholas F. ; Ingham, Roger J. ; Ingham, Janis C. ; Paolini, Katherine E. ; Grafton, Scott T.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Brain and Language (Full Text) vol. 124 no. 2 (2013), page 153-164.
Topik: Stuttered words; Mental imagery; Brain imaging; fMRI; Reliability
Fulltext: 124_02_Wymbs.pdf (1.27MB)

Isi artikel

Recent brain imaging investigations of developmental stuttering show considerable disagreement regarding which regions are related to stuttering. These divergent findings have been mainly derived from group studies. To investigate functional neurophysiology with improved precision, an individualparticipant approach (N = 4) using event-related functional magnetic resonance imaging and test–retest reliability measures was performed while participants produced fluent and stuttered single words during two separate occasions. A parallel investigation required participants to imagine stuttering or not stuttering on single words. The overt and covert production tasks produced considerable within-subject agreement of activated voxels across occasions, but little within-subject agreement between overt and covert task activations. However, across-subject agreement for regions activated by the overt and covert tasks was minimal. These results suggest that reliable effects of stuttering are participant-specific, an implication that might correspond to individual differences in stuttering severity and functional compensation due to related structural abnormalities.

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