Relationships Between Laryngoscopic Analysis Metrics of Supraglottic Compression and Vocal Effort in Primary Muscle Tension Dysphonia.
Adrianna C Shembel, Robert A Morrison, Sarah McDowell and 4 others
PMID 37865541WHAT IT FOUND
Supraglottic compression appeared in both voice-disordered and healthy occupational voice users.
False vocal fold compression was more severe in muscle tension dysphonia, but it did not correspond to self-reported vocal effort.
Key findings
01Whether supraglottic compression was present did not separate the voice-disordered group from the healthy group.
02On continuous area measures, the voice-disordered group had more mediolateral compression and the healthy group had more anteroposterior compression.
03In the voice-disordered group, neither mediolateral nor anteroposterior compression scores were significantly related to self-reported vocal effort.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The laryngoscope and lidocaine spray may have changed supraglottic position, although vocal effort was rated before these procedures. The raters were speech-language pathologists, not laryngologists. The voice-disordered and control groups differed in age; the paper reports a mean difference of 20 years. The study did not collect data on the level or type of formal vocal training. Primary muscle tension dysphonia diagnosis has circular logic because the condition is not well defined, so some voice-disordered participants may have had another voice disorder. Controls were occupational voice users, so some supraglottic patterns may reflect heavy vocal demands rather than pathology.
Declared interests
The authors declared no conflicts of interest.
The easy way to misread this
Do not conclude that supraglottic compression causes vocal effort in primary muscle tension dysphonia. The study found compression in both groups and no significant correlation between voice-disordered group compression scores and self-reported effort.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →