Neural basis in the generation of auditory evoked potentials of stable state at multiple frequencies

Abstract

OBJECTIVE: To study the neural bases involved in the generation of the auditory evoked potentials of stable state at multiple frequencies.

METHODS: Is designed a multi-channel high spatial resolution registry protocol for the potential auditory steady state at multiple frequencies and applies the Bayesian method for the estimation of its neurogenerators, defining restrictions priori to focus the initial calculation of the sources in the auditory system.

RESULTS: Shows that the superior temporal lobe of both hemispheres and brainstem are activated in response to amplitude-modulated tones. In addition, described tonotopic map of the primary auditory cortex, with areas of activation posteromedial at high frequencies carriers’ and anterolateral to the low frequencies. Also demonstrates synchronization and reactivity of the gamma band of the EEG at the level of the left superior temporal lobe in response to amplitude-modulated tones. The present results obtained a new methodology for the evaluation of the auditory system, which can be applied on the characterization of the cortical reorganization and neuroplasticity in hearing loss severe neurosensory and other sensory deprivation.