title: Kinematic investigation of lingual movement in words of increasing length in acquired apraxia of speech.
abstract: The current study aimed to use electromagnetic articulography (EMA) to investigate the effect of increasing word length on lingual kinematics in acquired apraxia of speech (AOS). Tongue-tip and tongue-back movement was recorded for five speakers with AOS and a concomitant aphasia (mean age = 53.6 years; SD = 12.60) during target consonant production (i.e. /t, s, k/ singletons; /kl, sk/ clusters), for one and two syllable stimuli. The results obtained for each of the participants with AOS were individually compared to those obtained by a control group (n = 12; mean age = 52.08 years; SD = 12.52). Results indicated that the participants with AOS exhibited longer movement durations and, in some instances, larger tongue movements during consonant singletons and consonant cluster constituents embedded within mono- and multisyllabic utterances. Despite this, two participants with AOS exhibited a word length effect that was comparable with the control speakers, and possibly indicative of an intact phonological system.
authors.affiliation: School of Health and Rehabilitation Sciences, The University of Queensland, Brisbane, Queensland, Australia. c.bartle@uq.edu.au
authors.forename: Carly J
authors.initials: CJ
authors.lastname: Bartle-Meyer
authors.forename: Justine V
authors.initials: JV
authors.lastname: Goozee
authors.forename: Bruce E
authors.initials: BE
authors.lastname: Murdoch
mesh_terms: D000328:Adult; D000368:Aged; D001072:Apraxias / Q000503:physiopathology*; D001696:Biomechanical Phenomena; D003952:Diagnostic Imaging; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011597:Psychomotor Performance; D013060:Speech; D013064:Speech Disorders / Q000503:physiopathology*; D013068:Speech Production Measurement; D014059:Tongue / Q000503:physiopathology*