Clinical EEG (electroencephalography)最新文献_第5页

Electroencephalographic changes during intravenous olfactory stimulation in humans. 人类静脉嗅觉刺激时的脑电图变化。

Clinical EEG (electroencephalography) Pub Date : 2002-10-01 DOI: 10.1177/155005940203300410

Hirofumi Harada, Fumihide Rikimaru, Takashi Mori, Masahiro Tanaka, Kimio Shiraishi, Toshihiko Kato

{"title":"Electroencephalographic changes during intravenous olfactory stimulation in humans.","authors":"Hirofumi Harada, Fumihide Rikimaru, Takashi Mori, Masahiro Tanaka, Kimio Shiraishi, Toshihiko Kato","doi":"10.1177/155005940203300410","DOIUrl":"https://doi.org/10.1177/155005940203300410","url":null,"abstract":"The intravenous olfaction test with thiamin propyl disulfide (TPD) is a simple procedure widely used in Japan. An olfactory stimulus is provided by intravenous injection of TPD (2 ml) over the course of 20 sec. The subject smells n-propyl mercaptan (a decomposition product of TPD discharged from the blood into alveoli) in expired air after treatment. In this preliminary study we recorded electroencephalograms (EEGs) in normal subjects during three stages: 1) eyes-closed rest (prestimulus), 2) olfactory sensation after TPD injection, and 3) disappearance of sensation. In each of these stages, we calculated and compared EEG powers according to the band components of each electrode position. This study was designed a) to evaluate by frequency analysis EEG changes during olfactory sensation after TPD injection, and b) to identify the most significant changes in EEG power according to frequency band and electrode location. During the intravenous olfactory stimulation, alpha 2 and beta 2 waves were activated over the frontal and temporal regions. After disappearance of olfactory sensation, these waves decreased in the same regions. EEG powers returned to prestimulus levels.","PeriodicalId":75713,"journal":{"name":"Clinical EEG (electroencephalography)","volume":"33 4","pages":"189-92"},"PeriodicalIF":0.0,"publicationDate":"2002-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/155005940203300410","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"22127511","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: 4

Topographic quantitative EEG response to acute caffeine withdrawal: a comprehensive analysis of multiple quantitative variables. 急性咖啡因戒断的地形定量脑电图反应:多定量变量的综合分析。

Clinical EEG (electroencephalography) Pub Date : 2002-10-01 DOI: 10.1177/155005940203300409

Roy R Reeves, Frederick A Struve, Gloria Patrick

{"title":"Topographic quantitative EEG response to acute caffeine withdrawal: a comprehensive analysis of multiple quantitative variables.","authors":"Roy R Reeves, Frederick A Struve, Gloria Patrick","doi":"10.1177/155005940203300409","DOIUrl":"https://doi.org/10.1177/155005940203300409","url":null,"abstract":"Most previous studies of the neurophysiological effects of caffeine have focused on the effects of caffeine ingestion, and few studies have examined the effects of caffeine withdrawal. This open study evaluated the quantitative EEG (QEEG) changes occurring during a 4-day period of abstinence in subjects who habitually consume 300 mg or more of caffeine daily. Thirteen subjects underwent QEEG studies during their usual caffeine consumption (baseline) and on days 1, 2, and 4 of a 4-day period of caffeine abstinence. Ten of the subjects underwent a second QEEG on day 4 that consisted of a period of recording after reinstitution of caffeine. A comprehensive analysis of multiple quantitative variables was performed for each study during the abstinence period and compared to the variables obtained at baseline for each subject. Changes occurring during caffeine abstinence included: 1) increases in theta absolute power over all cortical areas, 2) increases in delta absolute power over the frontal cortex, 3) decreases in the mean frequency of both the alpha and beta rhythm, 4) increase in theta relative power and decrease in beta relative power, and 5) significant changes in interhemispheric coherence. Most of these changes tended to return to pre-abstinence baseline levels rapidly after resumption of caffeine consumption. The caffeine withdrawal state affects a number of neurophysiological variables. Further investigation of the neurophysiological aspects of caffeine withdrawal using placebo controlled double blind assessment methods is warranted.","PeriodicalId":75713,"journal":{"name":"Clinical EEG (electroencephalography)","volume":"33 4","pages":"178-88"},"PeriodicalIF":0.0,"publicationDate":"2002-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/155005940203300409","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"22127510","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: 10

Sources of EEG activity in learning disabled children. 学习障碍儿童脑电图活动的来源。

Clinical EEG (electroencephalography) Pub Date : 2002-10-01 DOI: 10.1177/155005940203300405

Thalía Fernández, Thalía Harmony, Antonio Fernández-Bouzas, Juan Silva, Wendy Herrera, Efraín Santiago-Rodríguez, Liliana Sánchez

引用次数: 39

Sources of abnormal EEG activity in brain infarctions. 脑梗死患者异常脑电图活动的来源。

Clinical EEG (electroencephalography) Pub Date : 2000-10-01 DOI: 10.1177/155005940003100403

A Fernández-Bouzas, T Harmony, T Fernández, J Silva-Pereyra, P Valdés, J Bosch, E Aubert, G Casián, G Otero Ojeda, J Ricardo, A Hernández-Ballesteros, E Santiago

引用次数: 51

Correlation between clinical stages and EEG findings of subacute sclerosing panencephalitis. 亚急性硬化性全脑炎临床分期与脑电图的关系。

Clinical EEG (electroencephalography) Pub Date : 2000-10-01 DOI: 10.1177/155005940003100409

C Gürses, A Oztürk, B Baykan, A Gökyiğit, M Eraksoy, M Barlas, A Calişkan, H Ozcan

{"title":"Correlation between clinical stages and EEG findings of subacute sclerosing panencephalitis.","authors":"C Gürses, A Oztürk, B Baykan, A Gökyiğit, M Eraksoy, M Barlas, A Calişkan, H Ozcan","doi":"10.1177/155005940003100409","DOIUrl":"https://doi.org/10.1177/155005940003100409","url":null,"abstract":"In this retrospective study 67 patients with SSPE seen between the years 1980 and 1998 were reviewed. Using the criteria of SSPE diagnosis (clinical signs, characteristic EEG patterns, high titres of measles antibodies in the serum and CSF), the patients were divided into two groups. Group A fulfilled all criteria, however, due to the inability of measuring measles antibody before 1987, it was not possible to observe the third criterion in Group B. Among 67 patients, groups A and B consisted of 51 boys and 16 girls ranging in age between 1 to 23 years, mean age 13.1. The male/female ratio was 3.1. The periodic EEG complexes (PCs) were usually bilateral, synchronous and symmetrical. PC amplitude asymmetry was seen in 12 patients and 2 patients had no PC synchronization between the hemispheres. Six patients had more than one form of PC. Delta activity in anterior hemispheres after PC was seen in 40 patients, mostly in stage 2A. Thirty-two patients had focal epileptiform abnormalities in multiple locations at every stage but most frequently in frontal, central and temporal regions. One patient had PC over both hemispheres and periodic lateralized epileptiform discharges (PLEDs) over the right hemisphere. The EEG findings described and observed in our study do not seem to be specific to SSPE but these findings were not atypical or unusual.","PeriodicalId":75713,"journal":{"name":"Clinical EEG (electroencephalography)","volume":"31 4","pages":"201-6"},"PeriodicalIF":0.0,"publicationDate":"2000-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/155005940003100409","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21885206","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: 23

Effect of normal aging upon interhemispheric EEG coherence: analysis during rest and photic stimulation. 正常衰老对脑电相干性的影响:休息和光刺激时的分析。

Clinical EEG (electroencephalography) Pub Date : 2000-10-01 DOI: 10.1177/155005940003100404

M Kikuchi, Y Wada, Y Koshino, Y Nanbu, T Hashimoto

引用次数: 40

Transitory cognitive impairment in epileptic children during a CPT task. 癫痫儿童在CPT任务中的短暂性认知障碍。

Clinical EEG (electroencephalography) Pub Date : 2000-10-01 DOI: 10.1177/155005940003100405

A A González-Garrido, J L Oropeza de Alba, F R Gómez-Velázquez, T Fernández Harmony, J L Soto Mancilla, H Ceja Moreno, D Pérez Rulfo, S González Cornejo, R Riestra Castñeda, L E Aguirre Portillo, E Gómez Limón, J L Ruiz Sandoval

{"title":"Transitory cognitive impairment in epileptic children during a CPT task.","authors":"A A González-Garrido, J L Oropeza de Alba, F R Gómez-Velázquez, T Fernández Harmony, J L Soto Mancilla, H Ceja Moreno, D Pérez Rulfo, S González Cornejo, R Riestra Castñeda, L E Aguirre Portillo, E Gómez Limón, J L Ruiz Sandoval","doi":"10.1177/155005940003100405","DOIUrl":"https://doi.org/10.1177/155005940003100405","url":null,"abstract":"EEGs and behavioral responses were studied in two sex matched groups of 58 epileptic and 20 healthy children between 8 and 12 years of age, during the execution of a go-no go CPT (X; A-X) task to determine transitory cognitive impairment (TCI) incidence. Paroxysmal discharges were found on 87.9% and 5% of the EEGs in the epileptic and control groups respectively, with no differences related to sex. The predominant EEG findings with respect to paroxysmal discharges were the association of two or more types of paroxysms with frequency higher than 5/minute, an average duration less than 0.5 second and topographical distribution over temporal-parietal-occipital areas without significant interhemispheric differences. TCI was detected in 36.2% of epileptic children. The epileptic group showed significantly higher numbers of behavioral errors and longer reaction times (RTs) in relation to the control group. Analyzing RTs on the two blocks of the task, linear discriminant analysis showed an acceptable classification of TCI incidence between groups.","PeriodicalId":75713,"journal":{"name":"Clinical EEG (electroencephalography)","volume":"31 4","pages":"175-80"},"PeriodicalIF":0.0,"publicationDate":"2000-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/155005940003100405","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21885202","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: 17

Wavelet analysis of transient biomedical signals and its application to detection of epileptiform activity in the EEG. 瞬态生物医学信号的小波分析及其在脑电图癫痫样活动检测中的应用。

Clinical EEG (electroencephalography) Pub Date : 2000-10-01 DOI: 10.1177/155005940003100406

H Goelz, R D Jones, P J Bones

引用次数: 70

EEG findings in Konzo: a spastic para/tetraparesis of acute onset. 近藏的脑电图表现:急性发作的痉挛性下肢瘫痪。

Clinical EEG (electroencephalography) Pub Date : 2000-10-01 DOI: 10.1177/155005940003100408

D Tshala Katumbay, V M Lukusa, K E Eeg-Olofsson

引用次数: 24

The role of tiagabine in the treatment of intractable epilepsy of childhood with multifocal independent spikes: a case report. 替加滨在治疗儿童期多灶独立尖峰难治性癫痫中的作用:1例报告。

Clinical EEG (electroencephalography) Pub Date : 2000-10-01 DOI: 10.1177/155005940003100410

C I Akman, R Schubert

引用次数: 3