Ziegler, W. & von Cramon, D. (1983). Vowel distortion in traumatic
dysarthria: Lip rounding versus tongue advancement. Phonetica, 40,312-322.
Type
of
Study |
Research study
with controls |
| Subjects |
8 males; ages
20-30
9 gender-matched, age-matched controls |
| Diagnoses |
Severe TBI
Normal controls |
Speech
Condition |
Severe dysarthria following a period of
being nonverbal |
| Purpose |
To determine if the lingual-independent
gesture related to rounding was affected to a higher degree in the context
of conflicting gestures or if a preceding labial movement would help in
reaching the lip rounding target. |
| Methods |
Subjects said 3 vowels, /i/, /y/, and
/u/ in words and were recorded.
Formant trajectories were estimated for
the voiced segments.
The steady state sections of the vowels
were segmented.
The formant frequencies of F1 and F2 were
averaged over the stable portion of each vowel. |
| Results |
There were no dissociated defects of labial
and lingual motility.
The degree of undershoot of the gestures
was dependent on the context conditions.
The subjects used anticipatory coarticulation
to achieve targets. |
Treatment
Implications |
n/a |
| |
|
To
return to the Abstract References, click on Assessment
, Treatment , or
Speech
Characteristics
or
use your browser to go Back.
|