Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society最新文献

{"title":"Ambulatory cassette polysomnography: findings from a large cohort of drug-free insomnia patients.","authors":"J. Edinger, C. Erwin, A. Fins, G. Marsh, A. Krystal","doi":"10.1097/00004691-199505010-00008","DOIUrl":"https://doi.org/10.1097/00004691-199505010-00008","url":null,"abstract":"Technology for conducting ambulatory polysomnography (APSG) has been available for more than a decade, but relatively few studies have used this technology to study the sleep of subjects in their usual home sleeping environments. Herein we suggest the usefulness of this technology for the study of normal sleepers and insomniacs, and we report our APSG findings with a large cohort (n = 117) of drug-free insomnia outpatients. All patients completed a sleep-history questionnaire, a clinical interview with a sleep-disorders clinician, and one night of APSG in their homes. Most sleep parameters derived were consistent with previously reported laboratory PSG findings for insomniacs, except that values of rapid-eye-movement sleep latencies were generally shorter than typically found in laboratory studies. Moreover, results showed that APSG served to differentiate major age groups and diagnostic subtypes within our larger sample, and patient tolerance for APSG was within acceptable limits. We conclude that APSG is a useful technique for evaluating insomnia complaints.","PeriodicalId":117726,"journal":{"name":"Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130072579","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}

{"title":"Assessment of intraspinal and intracranial conduction by P30 and P39 tibial nerve somatosensory evoked potentials in cervical cord, brainstem, and hemispheric lesions.","authors":"Michele Tinazzi, François Mauguière","doi":"10.1097/00004691-199505010-00003","DOIUrl":"https://doi.org/10.1097/00004691-199505010-00003","url":null,"abstract":"In routine recordings of tibial nerve somatosensory evoked potentials (SEPs), a global central conduction time is evaluated by measuring the interval between the segmental spinal N22 potential, recorded in the lumbar region, and the cortical P39 potential. In this study, we tested the reliability of the scalp far-field P30 potential, which originates in the vicinity of the cervico-medullary junction, in order to evaluate separately intraspinal and intracranial conduction in normal subjects and patients with cervical cord and intracranial lesions. P30 and cortical P39 potentials were studied in 23 healthy subjects and in 70 patients with cervical cord (n = 47), brainstem (n = 11) or hemispheric lesions (n = 12) selected on the basis of neuroimaging--computed tomography (CT) or magnetic resonance (MR)--findings. Median nerve SEPs were also recorded in all patients. Of the several montages tested to obtain the P30 potential, the Fpz-Cv6 derivation gave the highest signal-to-noise ratio; it permitted to obtain a P30 potential that peaked at 29.2 +/- 1.6 ms in all normal subjects. P30 abnormalities were observed only in patients with cervical or cervico-medullary lesions; these were associated with a normal P39 in only two of 33 abnormal recordings. Conversely, P30 was consistently normal in lesions situated above the cervico-medullary junction whether associated with normal, delayed, or reduced P39. P30 abnormalities were subclinical in 42% of abnormal recordings. All patients with normal tibial and median nerve SEPs on both sides had normal touch, joint, and vibration sensation in the four limbs. There was a strong correlation between tibial nerve P30 and median nerve P14 data in the whole series of patients; both potentials behaved similarly in all cases of intracranial supramedullary lesions. Combined abnormalities of P30 and P39 potentials thus indicate that conduction is impaired at the spinal level and proved to be particularly informative for detecting spinal cord dysfunction in patients with neuroimaging evidence of a narrowed cervical canal. Recording of abnormal N13, P14, or P30 potentials provided evidence of a cervical cord dysfunction in 66% of patients who had a suspected spondylotic myelopathy. Recording of tibial nerve P30 potential has proven to give reliable and useful information when a separate assessment of intraspinal and intracranial somatosensory conduction is needed; it merits inclusion, as does the upper limb N13 potential, in the evaluation of patients whose MR image indicates cervical canal narrowing.","PeriodicalId":117726,"journal":{"name":"Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127289959","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}

{"title":"Motor nerve conduction studies: measurement principles and interpretation of findings.","authors":"B. Falck, E. Stålberg","doi":"10.1097/00004691-199505010-00004","DOIUrl":"https://doi.org/10.1097/00004691-199505010-00004","url":null,"abstract":"Motor nerve conduction studies are reviewed. The principles of electrode placement, stimulus intensity, algorithms for measurement of parameters, causes of variability, reference values, and reporting are discussed. A rigorous standardization of methods has several advantages. The sensitivity of each method is increased without loss of specificity. In addition, reference values obtained in one laboratory can be used in other laboratories as well. Pathophysiological interpretation of findings in different types of neuropathies is also presented.","PeriodicalId":117726,"journal":{"name":"Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132698395","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}

{"title":"Temporal intermittent rhythmic delta activity in electroencephalograms.","authors":"M. Normand, Zbigniew K. Wszolek, Donald W. Klass","doi":"10.1097/00004691-199505010-00005","DOIUrl":"https://doi.org/10.1097/00004691-199505010-00005","url":null,"abstract":"Temporal intermittent rhythmic delta activity (TIRDA) has been reported to be highly specific for diagnosing complex partial epilepsy. Of 12,198 electroencephalographic (EEG) recordings performed at the Mayo Clinic between May 1, 1990 and May 1, 1991, 33 records from 27 patients (18 women and nine men; mean age, 41.5 years; range, 13-82 years) showed TIRDA. Clinical seizures were diagnosed in all patients, and complex partial epilepsy was well documented in 23. In a control group of 100 patients without TIRDA and matched for age and sex, generalized seizures were diagnosed in 25 and partial seizures in 15. Differences between TIRDA and control groups were highly statistically significant. Focal temporal sharp waves or spikes occurred in 23 patients with EEG recordings that contained TIRDA; three of these patients also exhibited generalized atypical spike-and-wave discharges. Four patients had TIRDA but no other epileptiform activity, although earlier EEGs of three of these patients contained spikes or sharp waves. These findings confirm earlier work, and we conclude that TIRDA represents an important epileptogenic abnormality.","PeriodicalId":117726,"journal":{"name":"Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122764414","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}

{"title":"History and evolution of computerized electroencephalography.","authors":"T. Collura","doi":"10.1097/00004691-199505010-00001","DOIUrl":"https://doi.org/10.1097/00004691-199505010-00001","url":null,"abstract":"","PeriodicalId":117726,"journal":{"name":"Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133801705","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}

{"title":"Fundamental scientific factors in electrical stimulation of the nervous system.","authors":"M. Tulgar","doi":"10.1097/00004691-199505010-00002","DOIUrl":"https://doi.org/10.1097/00004691-199505010-00002","url":null,"abstract":"","PeriodicalId":117726,"journal":{"name":"Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society","volume":"440 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123450634","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}

{"title":"Regarding \"Sounds trigger spikes in the Landau-Kleffner syndrome\" by R. Paetau.","authors":"J. Green","doi":"10.1097/00004691-199503000-00011","DOIUrl":"https://doi.org/10.1097/00004691-199503000-00011","url":null,"abstract":"","PeriodicalId":117726,"journal":{"name":"Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134439125","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}

{"title":"Coupling of focal electrical seizure discharges with infantile spasms: incidence during long-term monitoring in newly diagnosed patients.","authors":"R. Hrachovy, J. Frost, D. Glaze","doi":"10.1097/00004691-199407000-00007","DOIUrl":"https://doi.org/10.1097/00004691-199407000-00007","url":null,"abstract":"To investigate the coupling of focal electrical seizure discharges (FS) and infantile spasms, we analyzed the video/polygraphic monitoring studies performed on 96 consecutive patients newly diagnosed with infantile spasms and hypsarrhythmic EEGs. A FS was considered to be coupled with infantile spasms if it occurred during a cluster of spasms (a series of individual spasms separated by < 1 min) or within 10 s of spasm onset or cessation. Ten patients demonstrated FS. In five patients (5% of the entire population) an apparent coupling of some FS with infantile spasms was observed during the baseline monitoring study. However, in three patients (only 3% of the entire population) was the observed coupling of FS and infantile spasms significant (p < 0.05). These results indicate that coupling of FS and infantile spasms occurs rarely, and that, in some instances, apparent couplings of FS and infantile spasms are best explained by chance coincidence. These findings do not support the hypothesis that the generation of infantile spasms at a subcortical level is dependent on a focal cortical discharge.","PeriodicalId":117726,"journal":{"name":"Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129848924","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}

{"title":"A comment on \"EEG and clinical neurophysiology at Johns Hopkins Medical Institutions: roots and development\".","authors":"C. Lombroso","doi":"10.1097/00004691-199403000-00013","DOIUrl":"https://doi.org/10.1097/00004691-199403000-00013","url":null,"abstract":"","PeriodicalId":117726,"journal":{"name":"Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124601244","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}

{"title":"Responses to the views and commentary on \"Standard specification for transferring digital neurophysiological data between independent computer systems\" (ASTM E1467-92) (J Clin Neurophysiol 1993; 10:397)","authors":"M. Dadswell","doi":"10.1097/00004691-199310000-00019","DOIUrl":"https://doi.org/10.1097/00004691-199310000-00019","url":null,"abstract":"","PeriodicalId":117726,"journal":{"name":"Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122807615","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}