Early Auditory Stimulation, Not Device Type: Comparable Cortical Maturation in Children Using Cochlear Implants or...

Area of Science:

• Audiology
• Neuroscience
• Pediatrics

Background:

• Congenital severe-to-profound sensorineural hearing loss impacts auditory development.
• Cortical auditory evoked potentials (CAEPs), specifically P1 latency, are key indicators of auditory pathway maturation.
• Comparing cochlear implants (CIs) and hearing aids (HAs) is crucial for optimizing rehabilitation strategies.

Purpose of the Study:

• To compare cortical auditory maturation, assessed by P1 latency, in children with congenital hearing loss using unilateral CIs versus bilateral HAs.
• To investigate the influence of early device fitting and aided thresholds on auditory development.

Main Methods:

• Retrospective study of 85 children with congenital severe-to-profound hearing loss, divided into unilateral CI (n=42) and bilateral HA (n=43) groups.
• All participants received devices before 48 months with aided free-field thresholds between 30-50 dB HL.
• CAEPs were recorded using speech stimuli, and P1 latency was analyzed and compared between groups.

Main Results:

• No significant difference in P1 latency was found between the CI and HA groups for any speech stimulus (/m/, /g/, /t/).
• Age at device fitting was comparable between groups.
• Despite longer device use duration in the HA group, no correlation was observed between duration of use and P1 latency.

Conclusions:

• Unilateral cochlear implantation and bilateral hearing aids demonstrate comparable P1 latency, indicating similar cortical auditory maturation when fitted early and optimally.
• Early and adequate auditory stimulation is vital for supporting auditory development in children with congenital hearing loss.
• Clinical management should consider individual patient needs and optimize device fitting for best outcomes.