Background Cluttering is a fluency disorder characterised by overly rapid or jerky speech
patterns that compromise intelligibility. The neural correlates of cluttering are unknown but
theoretical accounts implicate the basal ganglia and medial prefrontal cortex. Dysfunction in
these brain areas would be consistent with difficulties in selection and control of speech
motor programs that are characteristic of speech disfluencies in cluttering. There is a
surprising lack of investigation into this disorder using modern imaging techniques. Here, we …