Affordable Access

Analysis of abnormal articulatory dynamics in two dysarthric patients.

Authors
  • Hirose, H
  • Kiritani, S
  • Ushijima, T
  • Sawashima, M
Type
Published Article
Journal
The Journal of speech and hearing disorders
Publication Date
Feb 01, 1978
Volume
43
Issue
1
Pages
96–105
Identifiers
PMID: 633876
Source
Medline
License
Unknown

Abstract

By means of pellet tracking techniques using an X-ray microbeam system, observations of the articulatory movements of various types of dysarthric subjects were conducted. In selected cases, electromyography (EMG) was also performed. The data were specifically examined for range, velocity, and consistency (reproducibility) of the movements of the articulators, as well as the pattern of coordination of the different articulators involved. It was found in the case of ataxic dysarthria of cerebellar origin, for example, that the dynamic patterns were best represented as a difficulty in the initiation of purposeful movements and an inconsistency of articulatory movements, particularly in the repetitive production of a monosyllable. On EMG, breakdown of the rhythmical patterns in the articulatory muscles was quite obvious in the repetition of a monosyllable. In the case of amyotrophic lateral sclerosis (ALS), decrease in the range and velocity of movements was noted. This resulted from reduced neuromuscular units (NMU) activities manifested in clinical EMG. Analysis of the dynamic aspects of the dysarthrias is a promising approach for elucidating the nature of central problems of speech production and for a differential diagnosis of various types of dysarthrias.

Report this publication

Statistics

Seen <100 times