Adult cochlear implant success depends on prior experience with sound

Evidence

In adults, cochlear implants are fitted mainly to those individuals who already spoke before their hearing loss. In adults who were born deaf, the results of cochlear implantation have not been optimal: with no previous sound-evoked input, the adult auditory system may be unable to interpret auditory input and may not have the plasticity to learn it. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 2767

Categorization

• QUESTION: The paragraph is cut off mid-sentence at the contrast (children) — worth chasing the pediatric outcome data.
• XREF: Connects to critical-period / neural plasticity literature familiar to the reader.