Evaluating signal-correlated noise as a control task with language-related gamma activity on electrocorticography.

ABSTRACT:

Objective

Our recent electrocorticography (ECoG) study suggested reverse speech, a widely used control task, to be a poor control for non-language-related auditory activity. We hypothesized that this may be due to retained perception as a human voice. We report a follow-up ECoG study in which we contrast forward and reverse speech with a signal-correlated noise (SCN) control task that cannot be perceived as a human voice.

Methods

Ten patients were presented 90 audible stimuli, including 30 each of corresponding forward speech, reverse speech, and SCN trials, during ECoG recording with evaluation of gamma activity between 50 and 150 Hz.

Results

Sites of the lateral temporal gyri activated throughout speech stimuli were generally less activated by SCN, while some tempor

SUBMITTER: Brown EC 

PROVIDER: S-EPMC4035421 | biostudies-literature | 2014 Jul

REPOSITORIES: biostudies-literature