Ziegler, W. & von Cramon, D. (1986). Spastic dysarthria after acquired
brain injury: An acoustic study. British Journal of Disorders of Communication,
21,173-187.
Type
of
Study |
Research study
with controls |
| Subjects |
9 males, 1 female;
ages 21-62; 10-36 months post-onset
Gender-matched, age-matched controls |
| Diagnoses |
Severe TBI (8)
CVA (2)
Normal controls |
Speech
Condition |
Spastic dysarthria with varying degrees
of severity |
| Purpose |
To obtain a quantitative description of
speech rate and articulatory motility by acoustic measures of vowel and
consonant realization in CVC sequences.
To analyze sustaining lingual fricatives.
To examine syllable repetitions to assess
the subjects' ability to perform rapid changes in movement direction. |
| Methods |
Phonetic testing including repeating utterances
in carrier phrases, sustaining /s/, and rapid repetitions of diphthongs.
Consonant production was assessed with
sound pressure level contours.
Vowel articulation was characterized by
the frequencies of the first 2 formants.
Total word duration of the trisyllabic
utterances and period duration were used as time parameters.
FFT spectra were calculated for the sustained
fricative.
Formant trajectories were used to assess
the repeated diphthongs. |
| Results |
There was an increase in word and CV syllable
duration for TBI subjects.
There was a reduction of SPL contrast
in consonant articulation.
There was a centralization of vowel formants.
Stability of the sustained fricatives
was preserved.
Rapid diphthongs repetitions were impaired
in all TBI subjects.
There was a disproportionate impairment
of the tongue back movements compared to the tongue blade movements. |
Treatment
Implications |
n/a |
| |
|
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