Impairment of speech auditory feedback error detection and motor correction in post-stroke aphasia.
Stacey Sangtian, Yuan Wang, Julius Fridriksson and 1 others
PMID 34768093WHAT IT FOUND
People with left-hemisphere stroke were less accurate at hearing pitch changes in their own speech or in recordings, and their early speech corrections were smaller.
These deficits correlated with poor repetition scores, suggesting auditory feedback problems contribute to speech errors in aphasia.
Key findings
01Stroke participants had significantly lower accuracy detecting and rejecting pitch changes, and lower sensitivity scores, compared to controls, regardless of whether they were speaking or listening.
02Stroke participants showed reduced magnitude of early speech compensation responses (150-200 ms after pitch shift) compared to controls, though later responses were similar.
03Deficits in speech error detection during listening correlated with the size of early motor correction deficits, and error detection during speaking correlated with WAB-R repetition scores.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
Read the rest of this summary
You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.
What it does not show
The sample was heterogeneous, including various aphasia subtypes and some with apraxia, without controlling for lesion characteristics. The error detection task was subjective (button press), and neurophysiological data (EEG) were not analyzed in this report. Some participants may have had fatigue or comprehension difficulties, though training was provided. The study did not measure individual pitch discrimination thresholds, which could affect performance.
Declared interests
The authors declare no conflict of interest.
The easy way to misread this
Do not assume this is a treatment trial. This is an experimental study measuring sensory and motor deficits. It does not show that any specific therapy improves these functions. The correlations with repetition scores are moderate and do not prove that auditory feedback deficits cause all speech errors in aphasia.