Ziegler, W., Hoole, P., Hartmann, E., & von Cramon, D. (1988). Accelerated
speech in dysarthria after acquired brain injury: Acoustic correlates.
British
Journal of Disorders of Communication, 23,215-228.
Type
of
Study |
Research study
with controls |
| Subjects |
8 males, 4 females;
ages 18-68 |
| Diagnoses |
"Accelerated dysarthrics"-TBI (6), CVA
(5), Aneurysm surgery (1)
"Slow dysarthrics" ranging in severity(12)-control
group
Normal controls (15) |
Speech
Condition |
Dysarthria with rapid speech ranging in
severity
Dysarthria with slow speech ranging in
severity |
| Purpose |
To acoustically characterized accelerated
speech in people with varying degrees dysarthria following TBI. |
| Methods |
Sound pressure level contours were computed
for each test sentence.
Temporal speech parameters included SPL
maxima and minima, extended nucleus durations, and nucleus duration.
SPL minima were measured as related to
the tape noise.
Oscillographic tracings of the test words
were examined for unharmonic and harmonic signal energy and silent intervals. |
| Results |
"Accelerated dysarthrics" were minimally
different from the controls in temporal speech parameters.
"Accelerated dysarthrics" were impaired
in their ability to reduce the energy of radiated speech sound during stop
closures.
Even mildly impaired "accelerated dysarthrics"
had acoustic signs of undershooting their articulation while the "slow
dysarthrics" did not.
The "slow dysarthrics" had longer nuclei
and extended nuclei while they were shorter than normal in the "accelerated
dysarthrics".
Two contrastive patterns of incomplete
sound reduction during closures were identified including inappropriate
voicing versus the presence of friction noise during closures for voiceless
stops. |
Treatment
Implications |
n/a |
| |
|
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