Multiple effects of childhood deafness on cortical activity in children receiving bilateral cochlear implants simultaneously

► Cortical responses evoked with newly provided cochlear implants in children captured a measure of function in the deaf and immature brain. ► These responses were highly variable reflecting heterogeneous effects of deafness on brain development. ► Cortical function was more uniform when the aetiology of deafness was known to be associated with bilallelic GJB-2 mutations.