EEG-EMG Zeitschrift fur Elektroenzephalographie, Elektromyographie und verwandte Gebiete最新文献_第6页

[Pattern recognition techniques in sleep polygraphy]. [睡眠测谎中的模式识别技术]。

EEG-EMG Zeitschrift fur Elektroenzephalographie, Elektromyographie und verwandte Gebiete Pub Date : 1991-09-01

M Jobert, W Scheuler, W Röske, E Poiseau, S Kubicki

引用次数: 0

[Primary extinct evoked cerebral potentials in the diagnosis of brain death]. 【原发性绝灭诱发脑电位在脑死亡诊断中的应用】。

EEG-EMG Zeitschrift fur Elektroenzephalographie, Elektromyographie und verwandte Gebiete Pub Date : 1991-09-01

W F Haupt

引用次数: 0

[The median nerve evoked potential in normal children and youths: normal values]. [正常儿童和青少年正中神经诱发电位:正常值]。

EEG-EMG Zeitschrift fur Elektroenzephalographie, Elektromyographie und verwandte Gebiete Pub Date : 1991-09-01

G Mattigk

{"title":"[The median nerve evoked potential in normal children and youths: normal values].","authors":"G Mattigk","doi":"","DOIUrl":"","url":null,"abstract":"The derivation of cortical somatosensory evoked potentials permits a good local and functional diagnosis of supratentorial structures and the localisation of damage in this area. The special diagnostical relevance of early cortical somatosensory evoked potentials as a sage, non-invasive examination method in pediatric neurology is given both by these characteristics and by the fact that they cannot, in principle, be influenced by sleep or by drugs affecting the central nervous system. Somatosensory evoked cortical potentials of N. medianus were investigated for 35 children (17 boys, 18 girls) between the ages of 6 and 17, for whom there were no anamnestic or clinical indications of neurological or otological diseases. Investigations demonstrate that the SEPs of the N. medianus from the P15 up to and including the N55, is in every case clearly measurable in children from preschool age up to the end of adolescence. In the evaluation of the cortical SEPs, the P15, N20 and P25 were considered to be the components most stable and those most valuable for clinical practice. These could also be presented with the smallest standard deviations and side differences. The latencies of the P15 and N20 of the N. medianus show significant dependencies on the height of the children. The later potential components, side differences, interpeak intervals and amplitudes show no correlations with height. The SEPs of N. medianus show no dependencies on gender or on physical parameters such as weight or head circumference of the experiments. In summary it can be established that, using the procedure mentioned above, the cortical somatosensory evoked potentials in children can be described well and reproducibly and within practical narrow standard limits.","PeriodicalId":75812,"journal":{"name":"EEG-EMG Zeitschrift fur Elektroenzephalographie, Elektromyographie und verwandte Gebiete","volume":"22 3","pages":"147-51"},"PeriodicalIF":0.0,"publicationDate":"1991-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12927231","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: 0

[The effect of the lead electrodes on the conduction velocity of the sural nerve]. [铅电极对腓肠神经传导速度的影响]。

EEG-EMG Zeitschrift fur Elektroenzephalographie, Elektromyographie und verwandte Gebiete Pub Date : 1991-09-01

I W Husstedt, K H Grotemeyer, H P Schlake

{"title":"[The effect of the lead electrodes on the conduction velocity of the sural nerve].","authors":"I W Husstedt, K H Grotemeyer, H P Schlake","doi":"","DOIUrl":"","url":null,"abstract":"The result of nerve conduction velocity measuring depends upon all components of the measurement system. Earlier investigations showed that the nerve conduction velocity of the sural nerve depends also on technical attributes of recording electrodes. It was the objective of our study to investigate correlations between different recording electrodes and neurophysiological norm values as nerve conduction velocity and latency prolongation after paired stimulation of the sural nerve. Our investigations were carried out in twenty healthy volunteers aged 39 +/- 14 years. Stimulation of the sural nerve was performed at the lateral malleolus using always surface electrodes of the same type. Recording of nerve action potentials was done in each proband by four different types of electrodes. Surface electrodes consisted of tin, stainless steal and sintered silver/silver chloride, needle electrodes of stainless steel. The nerve conduction velocity using silver/silver chloride was 53.6 +/- 4.3 m/sec, using tin electrodes 53.1 +/- 3.9 m/s, using stainless steel 51.4 +/- 3.0 m/s and using needle electrodes 48,7 +/- 2.7 m/s. The Wilcoxon-test confirmed the differences of nerve conduction velocity between needle and silver/silver chloride and tin electrodes yielding p less than 0.05. Latency prolongation after paired stimulation of the sural nerve was independent from electrodes. In conclusion, our results indicate that electrodes take part in the system of standardization. Changing of recording or stimulation electrodes provoke the necessity of new standardization of norm values in clinical neurophysiology.","PeriodicalId":75812,"journal":{"name":"EEG-EMG Zeitschrift fur Elektroenzephalographie, Elektromyographie und verwandte Gebiete","volume":"22 3","pages":"152-6"},"PeriodicalIF":0.0,"publicationDate":"1991-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12927142","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: 0

[Somatosensory evoked potentials in moderate hyperthermia]. [中等高温的体感诱发电位]。

EEG-EMG Zeitschrift fur Elektroenzephalographie, Elektromyographie und verwandte Gebiete Pub Date : 1991-09-01

H Strenge

引用次数: 0

[Potential reversal/amplitude analysis: problems of normal value determination]. [电位反转/振幅分析:确定正常值的问题]。

EEG-EMG Zeitschrift fur Elektroenzephalographie, Elektromyographie und verwandte Gebiete Pub Date : 1991-09-01

J Finsterer, B Mamoli

引用次数: 0

[SEP monitoring during clonidine therapy of alcohol delirium]. [可乐定治疗酒精性谵妄时SEP监测]。

EEG-EMG Zeitschrift fur Elektroenzephalographie, Elektromyographie und verwandte Gebiete Pub Date : 1991-09-01

M Lorenz, L Verner, M Hartmann, M R Gaab

引用次数: 0

[Dose-response relationships between blood alcohol concentrations and cognitive potentials (visual P300) in man]. [人体血液酒精浓度与认知电位(视觉P300)之间的剂量-反应关系]。

EEG-EMG Zeitschrift fur Elektroenzephalographie, Elektromyographie und verwandte Gebiete Pub Date : 1991-06-01

A Taghavy, C F Kügler, L Brütting, D Taghavy, G Machbert

引用次数: 0

[Analysis of the generators of early cortical somatosensory evoked potentials (N. medianus) using dipole source analysis: initial results]. [用偶极子源分析早期皮层体感诱发电位(N. medianus)的产生器:初步结果]。

EEG-EMG Zeitschrift fur Elektroenzephalographie, Elektromyographie und verwandte Gebiete Pub Date : 1991-06-01

H Buchner, M Scherg

{"title":"[Analysis of the generators of early cortical somatosensory evoked potentials (N. medianus) using dipole source analysis: initial results].","authors":"H Buchner, M Scherg","doi":"","DOIUrl":"","url":null,"abstract":"There is still much controversy about the contribution of the brainstem, the thalamus and the somatosensory and motor areas of the various scalp recorded peaks of the somatosensory evoked potentials (SEP) after median nerve stimulation. This study addressed the generator problem of the scalp recorded potentials using brain electric source analysis. In 11 normal subjects median nerve SEPs were recorded from 32 locations. The brain-electric-source-analysis revealed a minimum of 5 sources with overlapping activities in the interval of 12-35 ms post stimulus. The initial deflections were in the time range of the scalp peaks (P14, P18, N20, P22, N30), but there was no single source to fully explain a scalp peak except for the brainstem source of P14. The other sources appeared to reflect activities of the thalamo-cortical-pathway (P18), of the somatosensory areas 3b (N20) and 1 (P22) and of a fifth source (contribution maximal around 30 ms) with no consistent location. The close location of multiple sources makes the precise separation and localisation of the various sources quite difficult in individual data sets.","PeriodicalId":75812,"journal":{"name":"EEG-EMG Zeitschrift fur Elektroenzephalographie, Elektromyographie und verwandte Gebiete","volume":"22 2","pages":"62-9"},"PeriodicalIF":0.0,"publicationDate":"1991-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13095414","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: 0

[Methodologic studies in dynamic EMG mapping based on the Hilbert transformation]. [基于Hilbert变换的动态肌电图映射方法研究]。

EEG-EMG Zeitschrift fur Elektroenzephalographie, Elektromyographie und verwandte Gebiete Pub Date : 1991-06-01

H Witte, N P Schumann, G Griessbach, H C Scholle, P Eskelinen

{"title":"[Methodologic studies in dynamic EMG mapping based on the Hilbert transformation].","authors":"H Witte, N P Schumann, G Griessbach, H C Scholle, P Eskelinen","doi":"","DOIUrl":"","url":null,"abstract":"On the basis of Discrete Hilbert Transformation spectral parameters for dynamic EMG analysis can be introduced. Within analysis intervals which are used in the same manner as in spectral analysis, the momentary power of EMG frequency bands can be computed as time series of the same interval duration. A close connection exists between momentary power and the current phenomenology of power spectral analysis because the momentary power of a defined frequency band can be seen as the exact dynamic equivalent of the corresponding mean power value deduced from the power spectrum. A multichannel EMG recording (greater than or equal to 16 channels) makes the representation of the topographical distribution of the spectral parameter by a coloured map possible. Additionally, the momentary power can be used to calculate map sequences. In this way, changes of EMG activity can be quantified by map sequences of an arbitrary time resolution. By calculation of momentary frequency via DHT an artefact detection scheme for ECG interference can be suggested. A completion of this methodology can be carried out by applications of adaptive filtration procedures. Using this concept of EMG processing, a new and common methodical basis of EMG power spectral analysis can be introduced.","PeriodicalId":75812,"journal":{"name":"EEG-EMG Zeitschrift fur Elektroenzephalographie, Elektromyographie und verwandte Gebiete","volume":"22 2","pages":"77-82"},"PeriodicalIF":0.0,"publicationDate":"1991-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13095416","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: 0