Abstract
Objective: The present study investigated lingual kinematics in a
group of seven participants diagnosed with idiopathic Parkinson’s
disease (PD) using the electromagnetic articulography (AG-200 EMA
Carstens).
Background: Articulatory imprecision in PD has been attributed
to reduced range of movement, rigidity and abnormal speed of movement
of the articulatory structures. Most of the previous studies provided
acoustic and kinematic evidence of lip muscle rigidity, reduced
amplitude and velocity of lip and jaw movement. Although reduced
tongue strength in PD has been reported, to date very limited studies
have documented the effects of PD on lingual kinematics.
Methods: Seven participants with idiopathic PD were rated as
non-dsysarthic on the basis of a perceptual assessment. A group of
seven age and sex matched non-neurologically impaired participants
served as controls participants. While fitted with the EMA system,
each participant was required to read aloud one sentence loaded with
alveolar consonants, /t/, to examine movement of the tongue tip and
one sentence loaded with velar consonants, /k/, to examine movement
of the tongue back. Three repetitions of each sentence by each
participant were analyzed.
Results: There was no difference between the PD and control
groups on the distance of tongue movement during either the
approach or release phases of either alveolar or velar consonants.
However, the PD did showed significant reduced acceleration
(p<.05) and deceleration (p<.01) of the tongue movement during the
approach phase of alveolar consonant production. Duration of tongue
movement was also significantly longer for the PD group than controls
during production of both alveolar (p<.01) and velar (p<.01)
consonants.
Conclusions: Findings suggest ‘‘articulatory undershoot’’ may be
the cause of articulatory impairment in PD. The implications of the
presence of subclinical changes in lingual kinematics for the management
of persons with PD are discussed.
| Original language | English |
|---|---|
| Pages (from-to) | S345-S345 |
| Number of pages | 1 |
| Journal | Movement Disorders |
| Volume | 24 |
| Issue number | S1 |
| DOIs | |
| Publication status | Published - 27 May 2009 |
| Externally published | Yes |
| Event | MDS 13th International Congress: The Movement Disorder Society’s 13th International Congress of Parkinson’s Disease and Movement Disorder - Paris, France Duration: 7 Jun 2009 → 11 Jun 2009 Conference number: 13th |