Abstract
Fatigue and increased effort are common symptoms for people with movement disorders and dysarthria, but they are rarely quantified. In an attempt to develop a clinically useful and physiologically meaningful measure of fatigue, we used a task that involves sustaining a target effort level without visual feedback while squeezing a bulb connected to a pressure transducer. In the first experiment, 12 healthy young adults performed the constant-effort task with the tongue and the preferred hand at 3 submaximal levels of effort. The resulting pressure declined over time as a negative exponential function with a nonzero asymptote. In the second experiment, 6 subjects performed the constant-effort task before and after acutely fatiguing the tongue and hand. The rate of pressure decline was significantly greater after fatigue. One possible mechanism for the characteristic negative exponential function is that it reflects a constant descending drive from higher centers in the CNS to the appropriate motoneuron pools. Thus, this technique may elucidate the contribution of central fatigue to normal and disordered speech.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 114-125 |
| Number of pages | 12 |
| Journal | Journal of Speech, Language, and Hearing Research |
| Volume | 39 |
| Issue number | 1 |
| State | Published - Feb 1996 |
| Externally published | Yes |
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Keywords
- Effort
- Fatigue
- Hand
- Speech
- Tongue
ASJC Scopus subject areas
- Rehabilitation
- Linguistics and Language
- Health Professions(all)
- Otorhinolaryngology
Cite this
Sense of effort and the effects of fatigue in the tongue and hand. / Solomon, Nancy Pearl; Robin, Donald A.; Mitchinson, Sara I.; VanDaele, Douglas J.; Luschei, Erich S.
In: Journal of Speech, Language, and Hearing Research, Vol. 39, No. 1, 02.1996, p. 114-125.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Sense of effort and the effects of fatigue in the tongue and hand
AU - Solomon, Nancy Pearl
AU - Robin, Donald A.
AU - Mitchinson, Sara I.
AU - VanDaele, Douglas J.
AU - Luschei, Erich S.
PY - 1996/2
Y1 - 1996/2
N2 - Fatigue and increased effort are common symptoms for people with movement disorders and dysarthria, but they are rarely quantified. In an attempt to develop a clinically useful and physiologically meaningful measure of fatigue, we used a task that involves sustaining a target effort level without visual feedback while squeezing a bulb connected to a pressure transducer. In the first experiment, 12 healthy young adults performed the constant-effort task with the tongue and the preferred hand at 3 submaximal levels of effort. The resulting pressure declined over time as a negative exponential function with a nonzero asymptote. In the second experiment, 6 subjects performed the constant-effort task before and after acutely fatiguing the tongue and hand. The rate of pressure decline was significantly greater after fatigue. One possible mechanism for the characteristic negative exponential function is that it reflects a constant descending drive from higher centers in the CNS to the appropriate motoneuron pools. Thus, this technique may elucidate the contribution of central fatigue to normal and disordered speech.
AB - Fatigue and increased effort are common symptoms for people with movement disorders and dysarthria, but they are rarely quantified. In an attempt to develop a clinically useful and physiologically meaningful measure of fatigue, we used a task that involves sustaining a target effort level without visual feedback while squeezing a bulb connected to a pressure transducer. In the first experiment, 12 healthy young adults performed the constant-effort task with the tongue and the preferred hand at 3 submaximal levels of effort. The resulting pressure declined over time as a negative exponential function with a nonzero asymptote. In the second experiment, 6 subjects performed the constant-effort task before and after acutely fatiguing the tongue and hand. The rate of pressure decline was significantly greater after fatigue. One possible mechanism for the characteristic negative exponential function is that it reflects a constant descending drive from higher centers in the CNS to the appropriate motoneuron pools. Thus, this technique may elucidate the contribution of central fatigue to normal and disordered speech.
KW - Effort
KW - Fatigue
KW - Hand
KW - Speech
KW - Tongue
UR - http://www.scopus.com/inward/record.url?scp=0029889179&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0029889179&partnerID=8YFLogxK
M3 - Article
C2 - 8820703
AN - SCOPUS:0029889179
VL - 39
SP - 114
EP - 125
JO - Journal of Speech, Language, and Hearing Research
JF - Journal of Speech, Language, and Hearing Research
SN - 1092-4388
IS - 1
ER -