Volume 4, Issue 2 (9-2014)                   MEJDS (2014) 4: 33 | Back to browse issues page

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Abnavi F, Ghasisin L, Alinejad B, Mahaki B. Acoustic Analysis of Speech Timing of Individuals with Broca’s Aphasia in Nasal Consonant Production. MEJDS. 2014; 4 (2) :33-42
URL: http://jdisabilstud.ir/article-1-358-en.html
Abstract:   (11341 Views)
Objective: Broca’s aphasia is one type of non-fluent aphasia, of which imprecise speech sound production is a main feature. Acoustic patterns of speech in patients with Broca’s aphasia exhibit certain defects in the field of motor control such as difficulties in timing, articulatory coordination, and laryngeal control. In this study, the speech timing parameter in patients with mild to moderate Broca’s aphasia was investigated by the acoustic variable of murmur duration /m/ to determine the nature of motor control as well as the nature of errors.
Methods & Materials: This was a cross-sectional case-control study. The subjects included 13 patients with mild to moderate Broca's aphasia as well as 13 normal individuals. After exposure to the appropriate test environment, acoustic signals related to target words were collected and recorded. After recording data with the PRAAT software, the spectrogram of each word was carefully examined to determine the murmur duration. Moreover, Paired T-test was used to compare the murmur duration between the two groups.
Results: People with mild to moderate Broca’s aphasia possess longer murmur duration in comparison to normal individuals. There was a significant difference between the two groups (p<0.001).
Conclusion: The increasing duration of the nasal murmur in individuals with mild to moderate Broca’s aphasia indicated that speech errors in these patients are due to defects in coordination, timing of movements and articulatory implementation in producing the target segment. Therefore, understanding the nature of errors and effective mechanisms in creating them in this group of patients allows the planning of more appropriate therapeutic strategies on the basis of more accurate assessments.

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Type of Study: Original Research Article | Subject: Rehabilitation
Received: 2014/08/1 | Accepted: 2014/09/4

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