Laryngeal Reaction Time Profiles in Spasmodic Dysphonia
- 1 April 1991
- journal article
- Published by American Speech Language Hearing Association in Journal of Speech, Language, and Hearing Research
- Vol. 34 (2) , 269-278
- https://doi.org/10.1044/jshr.3402.269
Abstract
This study combines measures of linguistic and vocal performance and long-latency auditory electrophysiology to investigate task-dependent variability in spasmodic dysphonia (SD). Linguistic performance was evaluated using several measures of relatively complex linguistic ability (i.e., discourse analysis). Vocal performance was evaluated by measuring acoustic laryngeal reaction time (LRT) for tasks that differ in complexity. Normal structure of the cortex and subcortex was confirmed by magnetic resonance imaging. Cortical function was measured using multichannel quantitative auditory evoked potentials (AEPs). As a group, SD subjects who demonstrated subtle linguistic deficits also demonstrated prolonged LRT for the complex task and repeated and persistent auditory electrophysiologic abnormalities over the anterior quadrant of the left hemisphere. As a group, linguistically normal SD subjects demonstrated no significant increase in LRT for the complex task and no recurrent electrophysiologic abnormalities over the left anterior cortex relative to normal controls. Results support a neurogenic origin of SD and suggest that some aspects of inter- and intrasubject variability may be related to differences in loci and magnitude of cortical abnormalities.Keywords
This publication has 28 references indexed in Scilit:
- Spasmodic Dysphonia, Whether and WhereJournal of Speech, Language, and Hearing Research, 1989
- Discourse in aphasia: Integration deficits in processing referenceBrain and Language, 1989
- Sequential mapping favours the hypothesis of distinct generators for Na and Pa middle latency auditory evoked potentialsElectroencephalography and Clinical Neurophysiology/Evoked Potentials Section, 1988
- Supplementary motor area structure and function: Review and hypothesesBehavioral and Brain Sciences, 1985
- Symptom Improvement of Spastic Dysphonia in Response to Phonatory TasksAnnals of Otology, Rhinology & Laryngology, 1985
- Auditory brainstem response abnormalities in adductor spasmodic dysphoniaAmerican Journal of Otolaryngology, 1982
- Central auditory function in spastic dysphoniaAmerican Journal of Otolaryngology, 1981
- Brain electrical activity mapping (BEAM): A method for extending the clinical utility of EEG and evoked potential dataAnnals of Neurology, 1979
- Participation of Mesial Cortex in Speech: Evidence from Cerebral Potentials Preceding Speech Production in ManPublished by Springer Nature ,1979
- Procedures for Detecting Outlying Observations in SamplesTechnometrics, 1969