Showing papers in "Electroencephalography and Clinical Neurophysiology in 1994"

TL;DR: This year's jurors included A.M.

TL;DR: A new multiple source eye correction (MSEC) method of eye artifact treatment based on multiple source analysis is presented, which incorporates a model of brain activity to enhance the precision of topographical EEG analyses.

TL;DR: The results show that the generators of components at 30, 50, 60 and 75 msec latency are distributed medio-laterally along Heschl's gyrus, and the localization of N100 generators is discussed.

TL;DR: This study learned to use two channels of bipolar EEG activity to control 2-dimensional movement of a cursor on a computer screen using multichannel EEG-based communication to help those with severe motor disabilities.

TL;DR: This study examines the hypothesis that in contrast to semantic memory processes that are assumed to be reflected primarily within the alpha band, episodic memory processes are related to activity within the theta band and shows that semanticMemory processes are indeed primarily reflected in the upper alpha band whereas episodicmemory processes are reflected inTheta band.

TL;DR: The new high resolution methods to improve the spatial resolution of EEG can provide a dramatic increase in the information content of EEG and appear to have widespread application in both clinical and cognitive studies.

TL;DR: Responses evoked by LM stimulation were less affected by changes in motor cortical excitability than those to PA stimulation, and it is suggested that LM stimulation can sometimes stimulate corticospinal fibres directly, at or near the same site as anodal stimulation.

TL;DR: The high-resolution visual field maps demonstrated that clinical field testing using the VEP is not feasible because of effects of cortical convolutions on responses, but the vast improvement in data quality and quantity make it a useful tool for VEP source localization and identification.

TL;DR: The assumption that full-blown burst-suppression is achieved through virtually complete disconnection in brain circuits implicated in the genesis of the EEG is corroborated by the revival of normal cellular and EEG activities after volleys setting into action thalamic and cortical networks.

TL;DR: Differences in the timing and topographical features of the ERD responses in the various frequency bands suggest a distinct functional significance for the various spectral components of the electrical activity in the motor cortex.

TL;DR: The results suggest that DPFCx andDPFCx-temporal projections play a critical role in involuntary orienting to physical changes in sequences of non-attended auditory stimuli.

TL;DR: The extraoperative electrical stimulation studies of 15 patients with intractable epilepsy who were evaluated with chronically implanted interhemispheric subdural electrodes showed SMA-type positive motor responses were elicited not only from the mesial portion of the superior frontal gyrus but also from its dorsal convexity, and from the paracentral lobule, cingulate gyrus, and precunes.

TL;DR: Combination of spectral analysis, reactivity of the rhythms with respect to tasks or stimuli, and source localization will allow focusing on well-specified cortical rhythms and assist in gaining an understanding of the functional significance of cortical rhythms.

TL;DR: A role of FDB in the fine-tuning of postural adjustment during forward leaning, and a weight-supporting role of Sol are suggested in the common range of inclination.

TL;DR: The dissociation of an exogenous, obligatory frontal component from the sensory-specific response in the auditory N1 suggests that parallel processes served by distinct neural systems are activated during acoustic stimulation.

TL;DR: Using a combination of 3 suitably located dipoles in a homogeneous sphere, the scalp potential due to a dipole source in a 4-shell spherical head model can be approximated with a high degree of precision and a more than 30-fold increase in computing speed.

TL;DR: It is concluded that somatosensory evoked magnetic high-frequency (600 Hz) wavelets have generators at or near the primary somatoensory cortex.

TL;DR: Results suggest that deblurred 124-channel topographic maps, registered with a subject's MRI and rendered in 3 dimensions, provide better spatial detail than has heretofore been obtained with scalp EEG recordings, and suggest that the potential for EEG as a functional neuroimaging modality has yet to be fully realized.

TL;DR: This new dry electrode has the advantages of no need for skin preparation or conductive paste, potential for reduced sensitivity to motion artifacts and an enhanced signal-to-noise ratio, and may be useful for the production of high resolution surface maps of brain activity where a large number of electrodes or prolonged recording times are required.

TL;DR: It now appears technically feasible to filter and decompose EEG using wavelet transforms in real time with ordinary microprocessors, without compromising the accuracy of feature extraction.

TL;DR: In this article, the median and posterior tibial nerve SEPs were tested for short latency and long latency SEPs, and the recommended standards set out below address specifically the short latency median SEPs.

TL;DR: In this article, a novel approach is introduced to examine EEG coherence in different frequency bands of 17 locations from the 10-20 system. Fifty patients with clinically diagnosed Alzheimer's disease were compared with 42 age-approximated non-demented controls.

TL;DR: The present data confirm the close relation of one subcomponent of the late positive complex, the P-CR, to the cognitive response-selection process and show the dependence and independence of P-SR on response selection by manipulating response selection complexity.

TL;DR: It is suggested that the source of augmented No-Go P300s is a generator involved with sensorimotor inhibition, and the mechanism of P300 waves and evidence linking these waves with inhibition in other task arrangements is discussed.

TL;DR: Auditory event-related potentials and especially the mismatch negativity component (MMN) were examined in dysphasic and normal children and a negative correlation between the peak latency of the frequency MMN and age was found.

TL;DR: Using the most frequent occurring spike topography patterns from a large sample of spikes improved goodness-of-fit values for both MEG and EEG localization and there was excellent agreement between MEG dipole sources and ECoG sources as well as surgical outcome and presence of MRI lesions.

TL;DR: It was found that, based on single EEG trials, the data from the 4 movements could be differentiated with an accuracy of 70% when alpha and gamma band activity were used but only with 58% in the case of the alpha band activity alone.

TL;DR: The results show that middle-latency auditory evoked responses receive a strong contribution from auditory cortical structures, and that differences of input latency to cortical auditory areas, evaluated from MLAEF latencies, do not explain the latency differences seen in late auditoryevoked fields to contralateral vs. ipsilateral stimulation.