ISSN:0002-9238    

DOI:10.1080/00029238.1986.11080185

出版商:Taylor&Francis    

年代:1986

数据来源: Taylor

摘要:

ABSTRACT.In elderly individuals suspected to have dementia, EEG changes are different from those in normal aging. In the early stages of dementia due to degenerative disorders of the CNS (e.g. Alzheimer's disease), the EEG is either normal or shows scattered theta-delta activities and decreasing frequency of the alpha rhythm. As the disease progresses, the EEG is almost always abnormal and the severity of the slowing is increased. In toxic-metabolic causes of intellectual impairment, the EEG abnormalities are more pronounced and include continuous medium-to-high amplitude anterior dominant theta-delta activities. In patients with dementia due to focal CNS insult (e.g. multiple infarcts, neoplasm, etc.), the EEG may show focal slowing and/or suppression of the background rhythms on the involved site. In certain dementing processes, EEG features may be more specific although not pathognomonic; e.g. periodic sharp waves in Jakob-Creutzfeldt disease, low amplitude background activities in Huntington's disease, paroxysms of sharp and spike waves superimposed on a slow background in dialysis dementia. EEG is most helpful in separating organic dementia from pseudodementia. Normal EEG or age-related changes support the later diagnosis. Since EEG is easily available and noninvasive, it is one of the most important screening tests in patients suspected of dementia.

ISSN:0002-9238    

DOI:10.1080/00029238.1986.11080186

出版商:Taylor&Francis    

年代:1986

数据来源: Taylor

摘要:

ABSTRACT.Mu rhythms can be considered as intrinsic or resting activity of the central region. Somatosensory stimulations or motor behavioral activity affect the generation mechanism of mu rhythms and result in an amplitude attenuation or blocking reaction. Mu rhythms can be found only in a small part of the population when standard electrode montages and visual EEG evaluation are used. Mu rhythms can be detected in nearly 100% of cases when closely spaced electrodes in a transverse montage are used and the EEG is recorded during slowly repeated, voluntary movements. Mu rhythms are of great importance in functional testing of patients with cerebrovascular insufficiency.

ISSN:0002-9238    

DOI:10.1080/00029238.1986.11080187

出版商:Taylor&Francis    

年代:1986

数据来源: Taylor

摘要:

ABSTRACT.REM sleep can be easily identified in standard EEG montages by analysis of eye movements in sleep, and the method of visual analysis was described. The patient should be asked upon arousal whether or not dreaming has occurred. Identification of REM sleep is important, because it may indicate significant abnormality of the wake-sleep cycle. Overnight sleep deprivation alone may be sufficient to cause shortening of the REM latency. Common clinical features that were associated with REM sleep in standard EEGs, were reviewed. The hospital environment is particularly likely to interfere with the patients' wake-sleep cycle.

ISSN:0002-9238    

DOI:10.1080/00029238.1986.11080188

出版商:Taylor&Francis    

年代:1986

数据来源: Taylor

摘要:

ABSTRACT.The purposes of this paper are to: 1. acquaint EEG personnel with common technical errors in the laboratory, 2. suggest methods that may assist in avoiding such errors and 3. pose questions that enable a technician to evaluate the quality of his performance in the laboratory.The major sources of errors in laboratory performance are inassumingthat: 1. you are always right, 2. all EEG's must be done the same way and 3. that analyzing artifacts, state of alertness, degree of abnormality (if any) and location can be done after the recording is completed.

ISSN:0002-9238    

DOI:10.1080/00029238.1986.11080189

出版商:Taylor&Francis    

年代:1986

数据来源: Taylor

ISSN:0002-9238    

DOI:10.1080/00029238.1986.11080190

出版商:Taylor&Francis    

年代:1986

数据来源: Taylor