Electroencephalography and clinical neurophysiology最新文献_第4页

EEG findings during basilar migraine attacks in children 儿童基底偏头痛发作时的脑电图

Electroencephalography and clinical neurophysiology Pub Date : 1998-11-01 DOI: 10.1016/S0013-4694(98)00094-7

G.P Ramelli , M Sturzenegger , F Donati , K Karbowski

引用次数: 23

Auditory and somatosensory evoked potentials in coma following spontaneous cerebral hemorrhage: early prognosis and outcome 自发性脑出血后昏迷的听觉和体感诱发电位:早期预后和结果

Electroencephalography and clinical neurophysiology Pub Date : 1998-11-01 DOI: 10.1016/S0013-4694(98)00080-7

E Facco, A.U Behr, M Munari, F Baratto, S.M Volpin, F Gallo, M.A Lanzillotta, G.P Giron

{"title":"Auditory and somatosensory evoked potentials in coma following spontaneous cerebral hemorrhage: early prognosis and outcome","authors":"E Facco, A.U Behr, M Munari, F Baratto, S.M Volpin, F Gallo, M.A Lanzillotta, G.P Giron","doi":"10.1016/S0013-4694(98)00080-7","DOIUrl":"10.1016/S0013-4694(98)00080-7","url":null,"abstract":"<div><p>The aim of this study was to check the prognostic power of auditory brain-stem responses (ABRs) and somatosensory evoked potentials (SEPs) in coma following spontaneous cerebral hemorrhage. Seventy patients comatose following subarachnoidal or hypertensive hemorrhage were submitted to ABR and SEP recordings during the acute phase of clinical course. Twenty-one patients survived (30%), two remained vegetative (2.9%) and 47 died (68.1%). The Glasgow Coma Score (GCS) was significantly related to the outcome (<em>P</em><0.001), but showed a low sensitivity, about 50% of patients with GCS=5–8 died or remained vegetative. ABRs and SEPs showed a much closer correlation with outcome (<em>P</em><0.001): their combined use allowed there to be a sensitivity of 96%, a specificity of 90% and a predictive power of 96%; the relative risk of poor outcome in patients with at least one abnormal modality was equal to 223 times the one for patients with normal evoked potentials. Moreover, in surviving patients a significant relationship appeared to exist between abnormalities of SEPs during the acute phase and the severity of disability. Our results confirm the prognostic effectiveness of short latency evoked potentials in cerebral hemorrhage: they are far superior to clinical data, being able to yield a marked decrease of falsely optimistic predictions.</p></div>","PeriodicalId":72888,"journal":{"name":"Electroencephalography and clinical neurophysiology","volume":"107 5","pages":"Pages 332-338"},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0013-4694(98)00080-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20780266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

Influence of spontaneous activity on peak-ratio analysis 自发活性对峰比分析的影响

Electroencephalography and clinical neurophysiology Pub Date : 1998-10-01 DOI: 10.1016/S0013-4694(98)00066-2

J Finsterer

{"title":"Influence of spontaneous activity on peak-ratio analysis","authors":"J Finsterer","doi":"10.1016/S0013-4694(98)00066-2","DOIUrl":"10.1016/S0013-4694(98)00066-2","url":null,"abstract":"<div><p><strong>Objectives</strong>: To prove or disprove the assumption that in neuropathy patients with abundant spontaneous activity, peak-ratio interference pattern analysis may lead to false negative results.<strong>Methods</strong>: Spontaneous activity >100 <em>μ</em>V, automatically analysed by turn/amplitude analysis and expressed as (turns/second)/2 ((T/S)/2), and interference patterns, analysed by the peak-ratio technique, were recorded, one after the other, from the right anterior tibial muscle of 21 patients with neuropathy, aged 36–87 years.<strong>Results</strong>: The mean number of spontaneous discharges ((T/S)/2) was 12.3 (range 5.5–26) and its mean amplitude 261 <em>μ</em>V (range 146–478 <em>μ</em>V). Despite this abundant spontaneous activity, peak-ratio analysis was neurogenic in 81% of the patients. All peak-ratio parameters were independent on the amount and amplitude of spontaneous discharges.<strong>Conclusions</strong>: Spontaneous discharges >100 <em>μ</em>V could be adequately assessed by means of the turn/amplitude analysis and did not influence peak-ratio analysis in neuropathies.</p></div>","PeriodicalId":72888,"journal":{"name":"Electroencephalography and clinical neurophysiology","volume":"107 4","pages":"Pages 254-257"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0013-4694(98)00066-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20779423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

35th annual meeting of the SENFC (Spanish Society of Clinical Neurophysiology). December 11-13, 1997, Barcelona, Spain. 第35届西班牙临床神经生理学学会年会。1997年12月11日至13日，西班牙巴塞罗那。

Electroencephalography and clinical neurophysiology Pub Date : 1998-10-01

引用次数: 0

Characteristic EEG findings in ring 20 syndrome as a diagnostic clue 环20综合征的特征性脑电图表现作为诊断线索

Electroencephalography and clinical neurophysiology Pub Date : 1998-10-01 DOI: 10.1016/S0013-4694(98)00069-8

Keiko Kobayashi , Masumi Inagaki , Masayuki Sasaki , Kenji Sugai , Shigeru Ohta , Toshiaki Hashimoto

{"title":"Characteristic EEG findings in ring 20 syndrome as a diagnostic clue","authors":"Keiko Kobayashi , Masumi Inagaki , Masayuki Sasaki , Kenji Sugai , Shigeru Ohta , Toshiaki Hashimoto","doi":"10.1016/S0013-4694(98)00069-8","DOIUrl":"10.1016/S0013-4694(98)00069-8","url":null,"abstract":"<div><p><strong>Objective</strong>: To review the EEG features of ring 20 syndrome in two patients to disclose the characteristic pattern of this syndrome. The features of our cases and 24 patients reported in the literature will be discussed.</p><p><strong>Subjects and methods</strong>: Report of two patients and review of literature.</p><p><strong>Results</strong>: The two patients had intractable epilepsy since childhood. Their clinical seizures were mostly complex partial seizures. Often the patients seizures were of prolonged duration. Ictal EEG revealed characteristic slow waves, and sharp waves. The slow waves were (1) usually synchronous high-voltage slow waves with or without a spike component predominantly in the frontal and frontopolar areas, (2) sometimes showed a change in frequency every several seconds, (3) continued for a long period, and (4) easily spread diffusely. The sharp waves were 5–6 Hz irregular and diffuse discontinuous sharp waves, and sometimes appeared predominantly in the centroparietal area. The clinical seizure pattern and EEG findings were similar in the 24 published cases.</p><p><strong>Conclusions</strong>: These EEG findings may be a characteristic feature of ring 20 syndrome and thus may be useful as a diagnostic clue.</p></div>","PeriodicalId":72888,"journal":{"name":"Electroencephalography and clinical neurophysiology","volume":"107 4","pages":"Pages 258-262"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0013-4694(98)00069-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20779424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 41

Intracerebral recording of potentials accompanying simple limb movements: a SEEG study in epileptic patients 伴随简单肢体运动的脑内电位记录:癫痫患者的SEEG研究

Electroencephalography and clinical neurophysiology Pub Date : 1998-10-01 DOI: 10.1016/S0013-4694(98)00073-X

Ivan Rektor , Jacques Louvel , Michel Lamarche

{"title":"Intracerebral recording of potentials accompanying simple limb movements: a SEEG study in epileptic patients","authors":"Ivan Rektor , Jacques Louvel , Michel Lamarche","doi":"10.1016/S0013-4694(98)00073-X","DOIUrl":"10.1016/S0013-4694(98)00073-X","url":null,"abstract":"<div><p><strong>Objectives</strong>: Slow potentials appearing during simple repetitive acral limb movement were investigated. Twenty-six patients suffering from drug resistant partial epilepsies and explored with implanted intracerebral electrodes were examined using two protocols.<strong>Methods</strong>: In 18 patients, readiness potential (RP), in 13 patients contingent negative variation (CNV), and in 7 patients both protocols, were tested. The recordings from leads with evident pathological EEG activity were excluded from evaluation. The results concerning the slow potentials preceding the movements in RP and CNV protocols have already been published. <strong>Results</strong>: The movement-accompanying slow potentials (MASP) were polyphasic or monophasic, started before or during the movement. In the primary motor cortex they followed the pre-movement potentials depending on the protocol: in the RP paradigm they were present only contralateral to the movement, but were bilateral in the CNV protocol. In other areas they either followed the potentials preceding the movement, in some cases with opposite polarity, or they occurred alone. MASP was recorded in motor and supplementary motor, premotor and prefrontal, midtemporal, somatosensory, superior parietal and cingular cortices. The cingular cortex was heavily involved in the self-paced movements but rarely in the cued movements.<strong>Conclusion</strong>: The major involvement of the cingular gyrus contrasted with the absence of slow potentials in temporal limbic structures. MASP is evidently a heterogenic phenomenon. Its genesis could be involved in a spread of information through the relevant structures.</p></div>","PeriodicalId":72888,"journal":{"name":"Electroencephalography and clinical neurophysiology","volume":"107 4","pages":"Pages 277-286"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0013-4694(98)00073-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20779426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 41

Perception of motion and qEEG activity in human adults 成人运动知觉和qEEG活动

Electroencephalography and clinical neurophysiology Pub Date : 1998-10-01 DOI: 10.1016/S0013-4694(98)00071-6

S Cochin , C Barthelemy , B Lejeune , S Roux , J Martineau

{"title":"Perception of motion and qEEG activity in human adults","authors":"S Cochin , C Barthelemy , B Lejeune , S Roux , J Martineau","doi":"10.1016/S0013-4694(98)00071-6","DOIUrl":"10.1016/S0013-4694(98)00071-6","url":null,"abstract":"<div><p>This study was designed to relate visual perception of motion to cortical activity, by evaluation of the association of quantified electroencephalogram (qEEG) parameters with a video film projection. The EEG was recorded from 14 sites according to the International 10–20 system and a common average reference was used. Forty right-handed volunteers (mean age=24 years) were examined. The video film consisted of 20 s sequences showing still shots and moving shots with human movements or object movements. The EEG was then subjected to spectral analysis; the spectral powers for the theta, alpha and beta bands were calculated for 14 s epochs and compared with sequences of the video film. All analyses were based on logarithmically transformed absolute spectral power values. The power values of each frequency band were analysed in a 3-way repeated measure ANOVA (Hemisphere×Electrode×Sequence). The results were represented by EEG cartography. Significant decreases in the alpha 1, beta 1 and beta 2 power values of EEG in centro-parietal regions of both hemispheres were shown during perception of human motion sequences. This suggests participation of the sensorimotor cortex during visual observation of human motion.</p></div>","PeriodicalId":72888,"journal":{"name":"Electroencephalography and clinical neurophysiology","volume":"107 4","pages":"Pages 287-295"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0013-4694(98)00071-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20779427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 276

Abstract 摘要

Electroencephalography and clinical neurophysiology Pub Date : 1998-10-01 DOI: 10.1016/S0013-4694(98)00067-4

引用次数: 0

Neurophysiological evaluation of pain 疼痛的神经生理学评估

Electroencephalography and clinical neurophysiology Pub Date : 1998-10-01 DOI: 10.1016/S0013-4694(98)00075-3

Burkhart Bromm, Jürgen Lorenz

引用次数: 418

Inter-hemispheric lateralization of event related potentials; motoric versus non-motoric cortical activity 事件相关电位的脑内偏侧化;运动与非运动的皮层活动

Electroencephalography and clinical neurophysiology Pub Date : 1998-10-01 DOI: 10.1016/S0013-4694(98)00068-6

Dennis Van 't Ent, Patricia Apkarian

{"title":"Inter-hemispheric lateralization of event related potentials; motoric versus non-motoric cortical activity","authors":"Dennis Van 't Ent, Patricia Apkarian","doi":"10.1016/S0013-4694(98)00068-6","DOIUrl":"10.1016/S0013-4694(98)00068-6","url":null,"abstract":"<div><p>To study hemispheric lateralization of cortical potentials associated with motoric and non-motoric function, cortical activity was recorded accompanying either finger extension or saccadic eye movements in a contingent negative variation (CNV) paradigm. Subjects viewed computer-generated pacing stimuli, presented in the left visual hemi-field, and were instructed to either initiate or inhibit a motor response following an imperative signal. Motoric lateralization was assessed by means of the lateralized readiness potential (LRP). In addition, a measure complementary to the LRP was introduced to investigate non-motoric lateralization (NML). Contralateral inter-hemispheric lateralization was evident in the LRP preceding finger movement, but was absent prior to eye movements. However, pre-saccadic cortical response profiles did exhibit a right hemispheric, non-motoric lateralization (NML) during stimulus presentation. Comparable non-motoric lateralization was found for finger extension. Results of the present study suggest that non-motoric lateralization may be a contributing factor to the frequently reported inter-hemispheric asymmetry preceding self-initiated saccadic eye movements. Results of the present study also suggest that the latter may be related to a covert shift of visuospatial attention toward the saccadic target. Associated shifts of attention are suppressed in a CNV paradigm, where attentional focus is primarily on the CNV stimulus during the pre-saccade period.</p></div>","PeriodicalId":72888,"journal":{"name":"Electroencephalography and clinical neurophysiology","volume":"107 4","pages":"Pages 263-276"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0013-4694(98)00068-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20779425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15