Document Detail


Somatosensory feedback mechanisms in tongue and speech muscle movements.
MedLine Citation:
PMID:  7330748     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The silent period of the tongue muscles was examined in two groups of 3 patients after operation upon the two main somatosensory pathways of the tongue in order to find out whether the servocontrol theory is also applicable to tongue and speech movements. The silent period was found to be in the normal range in the first group of patients (group I) who underwent surgery to the three upper cervical roots and was not detectable in the second group of patients (group II) who had undergone surgery to both trigeminal nerves. None of the patients in group I had any postoperative alteration of articulation or of the non-articulatory tongue movements, whereas the patients in group II showed a marked orolingual ataxia without disturbance in articulation. These results imply that the servocontrol theory is not completely applicable to the tongue movements and that the speech organ operates independently from a feedback control of the muscle spindles of the tongue. The speech process seems to be preprogrammed.
Authors:
R Sandyk
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde     Volume:  60     ISSN:  0256-9574     ISO Abbreviation:  S. Afr. Med. J.     Publication Date:  1981 Dec 
Date Detail:
Created Date:  1982-04-22     Completed Date:  1982-04-22     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0404520     Medline TA:  S Afr Med J     Country:  SOUTH AFRICA    
Other Details:
Languages:  eng     Pagination:  992-3     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Electromyography
Feedback
Humans
Somatosensory Cortex / physiology*
Speech / physiology*
Tongue / innervation*,  physiology

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