Journal article
Sense of Effort and the Effects of Fatigue in the Tongue and Hand
Journal of speech, language, and hearing research, Vol.39(1), pp.114-125
02/1996
DOI: 10.1044/jshr.3901.114
PMID: 8820703
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.
Details
- Title: Subtitle
- Sense of Effort and the Effects of Fatigue in the Tongue and Hand
- Creators
- Nancy Pearl Solomon - Department of Speech Pathology and Audiology and National Center for Voice and Speech University of Iowa Iowa CityDonald A Robin - Department of Speech Pathology and Audiology and National Center for Voice and Speech University of Iowa Iowa CitySara I Mitchinson - Department of Speech Pathology and Audiology and National Center for Voice and Speech University of Iowa Iowa CityDouglas J VanDaele - Department of Speech Pathology and Audiology and National Center for Voice and Speech University of Iowa Iowa CityErich S Luschei - Department of Speech Pathology and Audiology and National Center for Voice and Speech University of Iowa Iowa City
- Resource Type
- Journal article
- Publication Details
- Journal of speech, language, and hearing research, Vol.39(1), pp.114-125
- DOI
- 10.1044/jshr.3901.114
- PMID
- 8820703
- ISSN
- 1092-4388
- eISSN
- 1558-9102
- Language
- English
- Date published
- 02/1996
- Academic Unit
- Communication Sciences and Disorders; Radiation Oncology; Medicine Administration; Otolaryngology
- Record Identifier
- 9984006416202771
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