Barlow, S.M. &
Burton, M.K. (1990). Ramp-and-hold force control in the upper and lower
lips: Developing new neuromotor assessment applications in traumatically
brain injured adults. Journal of Speech and Hearing Research, 33,660-675.
Type
of
Study |
Preliminary
research study with controls |
| Subjects |
4
males; ages 17, 19, 26, and 31; 1, 16, 1, and 2 years
post-injury
20 males, 20 males; ages 18-36; normal controls |
| Diagnoses |
Motor
impairments in the lower face |
Speech
Condition |
Dysarthria |
| Purpose |
To
demonstrate refinements in protocol development, transducer
design, and the application of specially written digital
signal processing algorithms intended to characterize
several parameter of force control.
To establish normalized ramp-and-hold force data.
To obtain ramp-and-hold force data for people with TBI. |
| Methods |
Subjects
produced lip force as fast as possible while being accurate
for ten contractions for each target force level (.25,
.5, 1, 2).
Three maximum contractions were sampled for each structure.
The upper lip and lower lip were test separately. |
| Results |
Normative
data was obtained from the 40 normal adults.
TBI subjects have differences in magnitude and time course
of force instability following force attainment.
All TBI subjects had some force control impairment for
one or both lips.
The TBI subjects with less intelligibility were more severely
impaired for force control.
Hold phase weakness was not as problematic as force control. |
Treatment
Implications |
Physiology
assessment will expand knowledge about how brain damage
affects the cranial and spinal motor systems. |
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