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EMA Assessment of Tongue Function in dysarthria following stroke
Yea-Tzy Chen, Justine V. Goozée, Bruce E. Murdoch

The present study aimed to investigate tongue kinematics in a group of participants following stroke. Participants included 10 individuals (8 male, 2 female) with dysarthria post stroke (mean age: 53.9 years; SD: ± 15.77). Ten non-neurologically impaired individuals matched for age and gender served as controls. Each participant was assessed using electromagnetic articulatography during five repetitions of the sentence “Tess told Dan to stay fit.” Kinematic parameters estimated included velocity, acceleration/deceleration, distance moved, and duration of movement during both the approach and release phase of the alveolar consonant productions. Statistical analysis revealed a significant difference between the post-stroke and control groups on several kinematic parameters including velocity, acceleration/deceleration, and duration of movement. There was no significant difference between the two groups on distance of tongue movement during alveolar consonant production. Results were interpreted as indicating a reduction in the speed of tongue movement post-stroke resulting in longer movement durations. Clinical implications are discussed in the context of the need to improve speed of tongue movements in dysarthric speakers post stroke.

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