Roman Cmejla

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High-frequency cortical activity, particularly in the 250-600 Hz (fast ripple) band, has been implicated in playing a crucial role in epileptogenesis and seizure generation. Fast ripples are highly specific for the seizure initiation zone. However, evidence for the association of fast ripples with epileptic foci depends on animal models and human cases with(More)
Although articulatory deficits represent an important manifestation of dysarthria in Parkinson's disease (PD), the most widely used methods currently available for the automatic evaluation of speech performance are focused on the assessment of dysphonia. The aim of the present study was to design a reliable automatic approach for the precise estimation of(More)
The disorders of voice and speech in Parkinson's disease (PD) result from involvements in several subsystems including respiration, phonation, articulation, and prosody. We investigated the feasibility of acoustic measures for the identification of voice and speech disorders in PD, using a quick vocal test consisting of sustained phonation, diadocho-kinetic(More)
The purpose of this study was to analyze vowel articulation across various speaking tasks in a group of 20 early Parkinson's disease (PD) individuals prior to pharmacotherapy. Vowels were extracted from sustained phonation, sentence repetition, reading passage, and monologue. Acoustic analysis was based upon measures of the first (F1) and second (F2)(More)
The contribution addresses a sliding window modification of the Bayesian autoregressive change-point detector (BACD) enabling the sequential localization of signal changes (change-point detection). The modification consists in using the simplified data-dependent Bayesian evidence normalizing the classical BACD formula and in the recursive evaluation of(More)
Although rehabilitative training is a necessary adjunct in the management of gait ataxia, it remains unknown whether the possible beneficial effect of intensive coordinative training may translate to activities of daily living, which are closely connected with postural alignment. The aim of the present study was to examine the effectiveness of a 2-week(More)