Intracranial auditory detection and discrimination potentials as substrates of echoic memory in children

In children, intracranial responses to auditory detection and discriminatio n processes have not been reported. We, therefore, recorded intracranial ev ent-related potentials (ERPs) to both standard and deviant tones and/or syl lables in 4 children undergoing pre-surgical evaluation for epilepsy. ERPs to detection (mean latency = 63 ms) and discrimination (mean latency = 334 ms) were highly localized to areas surrounding the Sylvian fissure (SF). Th ese potentials reflect activation of different neuronal populations and are suggested to contribute to the scalp recorded auditory N1 and mismatch neg ativity (MMN). (C) 1999 Elsevier Science B.V. All rights reserved.