Oral Dynamics Laboratory

Faculty Research Areas

Laboratory:

Oral Dynamics Lab (ODL)

Description

Research areas (keywords)

Oral motor control; speech production; nonlinear dynamical systems theory; coordination dynamics; Articulatory Phonology; speech disorders; speech motor-linguistic interface; swallowing

Target populations

Healthy young and older subjects; Individuals with speech (apraxia of speech, Parkinson’s disease, fluency disorders) and/or swallowing disorders

Available resources/facilities

Electromagnetic 2D & 3D Articulograph (EMA); 3-D video system (APAS); Electromyography (EMG); Respitrace; Electro-glottography (EGG); acoustic analysis (Praat); force measuring equipment (ELF); Electropalatography (EPG)

Sample of recent projects

• Coordination in speech motor control: Dynamic determinants
• Speech motor practice and learning in people who stutter (SI: A. Namasivayam)
• Speech motor development (SI: H. Diepstra)
• Gestural basis of speech errors (SI: A. Slis)
• Dietary influences on stuttering severity (SI: J. Hum)
• Relationship between speech acoustics and facial motion in Parkinson's disease (Co-investigator: Dr. W. Wong; SIs: L. Ma, C. Li, & A.Kusumoto)
• Tongue control in swallowing in Parkinson's disease (Co-investigators: Drs. C. Steele & A. Lang)
• Spectral analysis of voice in Parkinson's patients and control subjects (Co-investigator: Dr. W. Wong; SI: C. Li)
  

Sample of recent publications

• Namasivayam, A. K., Van Lieshout, P. H. H. M., McIlroy, W. E., & De Nil, L. F. (2009). Sensory feedback dependence hypothesis in persons who stutter. Human Movement Science, 28, 688-707.
• Bose, A., & Van Lieshout, P. (2008). Effects of utterance length on lip kinematics in aphasia. Brain & Language, 106, 4 – 14.
• Namasivayam, A.K., Van Lieshout, P.H.H.M., & De Nil, L. (2008). Bite-block perturbation in people who stutter: Immediate compensatory and delayed adaptive processes. Journal of Communication Disorders, 41, 372-394.
• Namasivayam, A.K., & Van Lieshout, P.H.H.M. (2008). Investigating speech motor practice and learning in people who stutter. Journal of Fluency Disorders, 33, 32-51.
• Steele, C.M. & Van Lieshout, P.H.H.M. (2008). The dynamics of lingual-mandibular coordination during liquid swallowing. Dysphagia, 23, 33-46.
• Craig, M., Van Lieshout, P., & Wong, W. (2007). Suitability of a UV-Based Video Recording System for the Analysis of Small Facial Motions during Speech. Speech Communication, 49, 679-686.
• Van Lieshout, P.H.H.M., Bose, A., Square, P.A., & Steele, C.M. (2007). Speech motor control in fluent and dysfluent speech production of an individual with apraxia of speech and Broca’s aphasia. Clinical Linguistics & Phonetics, 21(3), 159-188.
• Van Lieshout, P.H.H.M. & Goldstein, L.M. (2008). Gestural phonology and speech impairments. In M.J. Ball, M. Perkins, N. Müller, & S. Howard (eds.), Handbook of Clinical Linguistics (Chapter 29; pp. 467-479). Blackwell Publishing: Oxford, UK.
• Van Lieshout, P.H.H.M. (2006). La utilización de la articulografia mediosagital electromagnética en la investigación sobre movilidad oral [The use of Electro-Magnetic Midsagittal Articulography in oral motor research] (4.12.1; pp. 1140-1156). In Eduardo Padrós-Serrat (Ed.), Bases diagnósticas terapéuticas y posturales del funcionalismo craneofacial. [Diagnostic, therapeutic and postural basis of craniofacial functionalism]. Madrid, Spain: Ripano Editorial Médica
• Van Lieshout, P.H.H.M. (2004). Dynamical systems theory and its application in speech. In: B. Maassen, R. Kent, H.F.M. Peters, P. van Lieshout and W. Hulstijn (eds.). Speech Motor Control In Normal And Disordered Speech (p. 51-82). Oxford, UK: Oxford University Press
• Van Lieshout, P.H.H.M., Hulstijn, W., & Peters, H.F.M. (2004). Searching for the weak link in the speech production chain of people who stutter: A motor skill approach. In: B. Maassen, R. Kent, H.F.M. Peters, P. van Lieshout and W. Hulstijn (eds.). Speech Motor Control In Normal And Disordered Speech (p. 313-356). Oxford, UK: Oxford University Press.

Lab director info

Pascal van Lieshout, PhD
p.vanlieshout@utoronto.ca

Personal homepage

Funding

Natural Sciences and Engineering Research Council (NSERC)

Canadian Institutes of Health Research (CIHR)

Canada Research Chair (CRC) - CIHR

Canada Foundation for Innovation (CFI)

Ontario Innovation Trust (OIT)

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