Detecting Silent Vocalizations in a Locked-In Subject
Lower beta band peaks associated with three different testing conditions. During the rest period, virtually no beta peaks were detected. During the speaking of “Two” beta peaks appeared over the posterior part of the temporalis muscle (that overlies the speech area), but not the anterior (that is not over the speech area). During articulatory movement of jaw clenching, beta peaks were observed similar to the say “Two” data collection, namely, over the posterior part of the temporalis muscle, not the anterior, indicating that articulator movements are related to beta peaks.