title: Perceived articulatory precision in patients with Parkinson's disease after deep brain stimulation of subthalamic nucleus and caudal zona incerta.
abstract: The effect of deep brain stimulation (DBS) of the subthalamic nucleus (STN) and caudal zona incerta (cZi) on speech articulation in patients with Parkinson's disease (PD) was investigated. Read speech samples were collected from nine patients with STN-DBS and 10 with cZi-DBS. The recordings were made pre-operatively and 12 months post-operatively with stimulator on and off (on medication). Blinded, randomised, repeated perceptual assessments were performed on words and isolated fricatives extracted from the recordings to assess (1) overall articulatory quality ratings, (2) frequency of occurrence of misarticulation patterns and (3) fricative production. Statistically significant worsening of articulatory measures on- compared with off-stimulation occurred in the cZi-DBS group, with deteriorated articulatory precision ratings, increased presence of misarticulations (predominately altered realisations of plosives and fricatives) and a reduced accuracy in fricative production. A similar, but not significant, trend was found for the STN-DBS group.
authors.affiliation: Department of Clinical Sciences, Division of Speech and Language Pathology and.
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Eklund
authors.forename: Johanna
authors.initials: J
authors.lastname: Qvist
authors.forename: Lena
authors.initials: L
authors.lastname: Sandström
authors.forename: Fanny
authors.initials: F
authors.lastname: Viklund
authors.forename: Jan
authors.initials: J
authors.lastname: Van Doorn
authors.forename: Fredrik
authors.initials: F
authors.lastname: Karlsson
mesh_terms: D000368:Aged; D001184:Articulation Disorders / Q000175:diagnosis / Q000503:physiopathology* / Q000628:therapy*; D046690:Deep Brain Stimulation; D004311:Double-Blind Method; D005260:Female; D005500:Follow-Up Studies; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000503:physiopathology* / Q000628:therapy*; D010700:Phonetics; D011446:Prospective Studies; D011897:Random Allocation; D012660:Semantics; D013061:Speech Acoustics; D013062:Speech Articulation Tests; D013065:Speech Intelligibility; D020531:Subthalamic Nucleus / Q000503:physiopathology*; D065820:Zona Incerta / Q000503:physiopathology*
keywords: Assessment; Parkinson’s disease; deep brain stimulation; dysarthria; phonetics