The purpose of this study was to describe the methodology necessary for simultaneous recording of intracranial EEG (ICEEG) and magnetoencephalography (MEG) and to assess the sensitivity of whole-head MEG versus depth electrode EEG in the detection and localization of epileptic spikes. Interictal MEG and depth electrode activities from the temporal mesial… (More)
Auditory deviance detection occurs around 150 ms after the onset of a deviant sound. Recent studies in animals and humans have described change-related processes occurring during the first 50 ms after sound onset. However, it still remains an open question whether these early and late processes of deviance detection are organized hierarchically in the human… (More)
A new method of summation of slowly convergent series is proposed. It may be successfully applied to the summation of generalized and basic hypergeometric series, as well as some classical orthogonal polynomial series expansions. In some special cases, our algorithm is equivalent to Wynn's epsilon algorithm, Weniger transformation (Computer Physics Reports… (More)
There is not yet a formal definition of magnetoencephalography (MEG) spike. This study provides a parametric description and definition of clear-cut MEG spikes recorded simultaneously by MEG and depth electrodes (iEEG). A total number of 367 simultaneous MEG/iEEG spikes were selected for analysis. Distribution of morphologic spike parameters and detailed… (More)
In a recent paper (Appl. a method of summation of some slowly convergent series. The purpose of this note is to give more analysis for this transformation, including the convergence acceleration theorem, in the case of summation of generalized hypergeometric series. Some new theoretical results and illustrative numerical examples are given.
The formation of echoic memory traces has traditionally been inferred from the enhanced responses to its deviations. The mismatch negativity (MMN), an auditory event-related potential (ERP) elicited between 100 and 250ms after sound deviation is an indirect index of regularity encoding that reflects a memory-based comparison process. Recently, repetition… (More)
The bivariate big q-Jacobi polynomials are defined by  and H ± n,i (i = 1, 2) are tridiagonal matrices of appropriate dimensions. We discuss in full detail the case of the polynomials P n,k (x, y; a, b, c, 0; q), which are closely related to Dunkl's bivariate (little) q-Jacobi polynomials .
Magnetoencephalography is a technique that can noninvasively measure the brain signal. There are many advantages of using this technique rather than similar procedures such as the EEG for the evaluation of medical diseases. However, one of its main problems is its high sensitivity to sources causing metallic distortion of the signal, and the removal of this… (More)
A well known method for convergence acceleration of a continued fraction K(a n /b n) is based on the use of modified approximants S n (ω n) in place of the classical ones S n (0), where ω n are close to tails f (n) of the continued fraction. Recently (Numer. Algorithms 41 (2006), 297–317), the author proposed an iterative method producing tail… (More)