How can near infrared spectroscopy be informative about the brain activation of children using a hearing implant? Preliminary case-control findings.
Dayanna Apolinário Diniz, Débora Marques de Miranda, Ana Lívia Libardi Bertachini and 3 others
PMID 41221978WHAT IT FOUND
One child using a cochlear implant and contralateral hearing aid showed temporal and parieto-occipital activation to mother's voice.
Compared with three hearing children, findings were preliminary and cannot show the implant alone caused the activation.
Key findings
01The child received a right cochlear implant at one year and four months and continued using a hearing aid in the other ear.
02During fNIRS recording, the implanted child showed greater activation in temporal and parieto-occipital regions in response to mother's voice stimulation.
03The power test comparing the implanted child with three hearing children produced a blank image, and the hearing group showed no difference from baseline.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
Only one implanted child and three hearing children were included, so the study cannot show that cochlear implantation changes brain activation or hearing outcomes. The child used a cochlear implant and a contralateral hearing aid, so the effect of either device alone cannot be separated. The fNIRS comparison was preliminary: the hearing group showed no difference from baseline, and the paper does not provide a validated clinical endpoint. The child had no significant improvements with hearing aids and weekly speech therapy before implantation, so later responses cannot be attributed only to the implant. The study is described as being expanded to a larger number of children, so the current findings are not definitive.
Declared interests
Financial support: CNPq (302296/2022-0), CAPES (001).
The easy way to misread this
Do not conclude that the cochlear implant alone caused the observed brain activation. The child also used a contralateral hearing aid, and the study included a child with the implant and three hearing controls.
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 →