摘要:

ABSTRACT.This study examined the clinical presentation and electrographic features of 34 children with positive polarity epileptiform activity in routine EEG recordings, in an attempt to determine the clinical significance of these discharges. Positive discharges when seen in the neonatal period were broad sharp waves always located along the rolandic strip. In older children the discharges were much sharper and involved the rolandic region or occasionally the frontal or occipital area.Clinically, a large percentage of neonates and children with positive discharges presented with significant neurological impairment. The impairment included congenital anomalies, chronic neurological deficits, and concomitant structural lesions. The exception to this finding was seen in four children who, in addition to their positive discharges, had independent dipole spike discharges. These children had a lower degree of neurological impairment.

ISSN:0002-9238    

DOI:10.1080/00029238.1992.11080399

出版商:Taylor&Francis    

年代:1992

数据来源: Taylor

摘要:

ABSTRACT.EEGs are often performed on patients with a history of alcohol abuse. Certain EEG findings are characteristic of an alcohol-associated condition, but there are no pathognomonic changes. Chronic alcoholism is associated with a high incidence of low voltage recordings, however a small number of non-alcoholic patients may also have low voltage EEGs. In mild, uncomplicated withdrawal, the EEG may be normal or may show only mild, diffuse slowing. In more severe withdrawal states, including delirium tremens, there is a higher incidence of slowing. EEGs in patients with generalized withdrawal seizures are predominantly normal or show minor amounts of slowing. Patients with previous focal seizures or head injuries, are likely to show focal or paroxysmal EEG changes. Photomyoclonic and photoconvulsive responses sometimes occur during alcohol-withdrawal states, but in recent years have become uncommon. Alcohol abuse leads to numerous secondary conditions such as hepatic encephalopathy, Wernicke-Korsakoff syndrome, dementia, focal brain injury, each of which may be associated with EEG changes. The EEG is helpful in evaluating cerebral function in a variety of alcohol-related conditions.

ISSN:0002-9238    

DOI:10.1080/00029238.1992.11080400

出版商:Taylor&Francis    

年代:1992

数据来源: Taylor

摘要:

ABSTRACT.Magnetic stimulation is a painless and promising new technique for studying the nervous system. The basic theory and electronic circuits are straightforward. The magnetic field easily activates cerebral cortex and deep nerves that are inaccessible to conventional stimuli. Most applications thus far have been in the motor system. Thousand of patients with different neurological diseases have been studied clinically without adverse effects, and research applications are expanding.

ISSN:0002-9238    

DOI:10.1080/00029238.1992.11080401

出版商:Taylor&Francis    

年代:1992

数据来源: Taylor

摘要:

ABSTRACT.AIDS dementia, and the more subtle forms of cognitive dysfunction which may precede it, are important but poorly understood aspects of human immunodeficiency virus (HIV) infection. Event related potential (ERP) data have been obtained from 83 HIV+ subjects at a first, 47 at a second, and 29 at a third examination at six month intervals. Significant increases in P3 latency in both asymptomatic and symptomatic groups were found by repeated measures testing. N2 latencies were significantly prolonged in both the asymptomatic and symptomatic groups relative to control values but did not increase with time. Earlier (N1 and P2) components were not increased although a trend was present for an increase in P2 over time. A significant difference between asymptomatic and symptomatic groups was not defined for any ERP component latency.The N2 and the P3 components of the P3 event related potential are frequently abnormal in HIV+ subjects with the P3 latency showing increasing abnormality over time. There has been insufficient evidence of neurological dysfunction in the patient group under study to permit estimation of the clinical significance of these ERP changes in AIDS.

ISSN:0002-9238    

DOI:10.1080/00029238.1992.11080402

出版商:Taylor&Francis    

年代:1992

数据来源: Taylor

ISSN:0002-9238    

DOI:10.1080/00029238.1992.11080403

出版商:Taylor&Francis    

年代:1992

数据来源: Taylor

ISSN:0002-9238    

DOI:10.1080/00029238.1992.11080404

出版商:Taylor&Francis    

年代:1992

数据来源: Taylor

ISSN:0002-9238    

DOI:10.1080/00029238.1992.11080405

出版商:Taylor&Francis    

年代:1992

数据来源: Taylor

ISSN:0002-9238    

DOI:10.1080/00029238.1992.11080406

出版商:Taylor&Francis    

年代:1992

数据来源: Taylor