EEG-EMG Zeitschrift für Elektroenzephalographie, Elektromyographie und verwandte Gebiete
-
EEG EMG Z Elektroenzephalogr Elektromyogr Verwandte Geb · Dec 1987
[Early prognostic assessment using evoked potentials in severe craniocerebral trauma].
103 patients in acute posttraumatic coma were assessed during 72 hours following severe head injury by clinical examinations (documented with a modified Glasgow-Coma-Score and a brain-stem-score and brainstem auditory evoked potentials (BAEP) as well as short latency somatosensory evoked potentials (SEP). Patient outcomes were classified at 6 months or more, according to the following categories: good recovery, severely disabled or vegetative, and brain dead. Patients who had died by systemic complications were excluded from the study. ⋯ The brainstemscore and the BAEPs were reliable predictors of an unfavorable but not a favorable outcome. SEP data however, performed well as a prognostic indicant in predicting an unfavorable as well as a favorable outcome. Using the BAEP, the amplitude ratio Wave V/Wave I is more sensitive to detect a lesion than the interpeak-latency Wave I-Wave V, and--using the SEP--the amplitude ratio N20/N13b (over C2) is more sensitive than the central conduction time (N13a (over C7)--N20).
-
EEG EMG Z Elektroenzephalogr Elektromyogr Verwandte Geb · Jun 1987
[Value of the EEG in the prognosis of post-anoxic coma following cardiocirculatory arrest].
The EEGs of 26 patients who remained at least 6 hours in coma after cardiovascular arrest were analyzed. The first EEG was recorded within few days after reanimation, classified in a 5-grade scale of increasingly severe impairment and compared with the final clinical outcome. ⋯ Grade II and III findings have no definite prognosis: the EEG should be repeated one or two days later, a favorable outcome is to be expected only with rapid improvement of the tracing. Grade IV and Grade V findings have a very serious prognosis: complete recovery has been described episodically, most in the pediatric population and with findings of alpha-coma.
-
EEG EMG Z Elektroenzephalogr Elektromyogr Verwandte Geb · Dec 1986
[Effect of contact lenses and visual acuity on the registration of saccadic eye movements using an infrared reflection method].
In order to examine the influence of contact lenses and visual acuity on recordings of saccadic eye movements with the infrared reflection method, horizontal 20 and 30 degrees saccades were recorded with and without contact lenses in 16 subjects (32 eyes) usually wearing contact lenses. As far as the main parameters of the saccades (accuracy, peak velocity and duration) were concerned, the reliability of the measurements (recognizable through the mean values) was not essentially influenced by the contact lenses. The precision of the measurements (recognizable through the standard deviation) was with the contact lenses significantly but, for clinical use, not essentially worse. ⋯ Visual acuity had no measurable influence on the main parameters of the saccades. However, considerably more corrective saccades were observed with contact lenses than without. There were reasons to believe that not the contact lenses themselves, but better visual acuity was responsible for the larger number of corrective saccades.
-
EEG EMG Z Elektroenzephalogr Elektromyogr Verwandte Geb · Jun 1985
Comparative Study[Somatosensory evoked potentials in comatose patients: comparison with clinical findings, EEG and prognosis].
21 comatose patients were examined by somatosensory evoked potentials (SSEP). The findings were correlated with the stage of brainstem herniation, the EEG and the outcome. We evaluated the early components of the SSEP (N10, N13, N14, P15, N20) in view of presence, latency and interpeak-latency of the potentials. ⋯ SSEP over the scalp (P15, N20) could not be registered in patients without any EEG-activity (isoelectric). Mean values of latencies and the interpeak-latencies were significantly prolonged in all cases with fatal outcome. Our findings suggest SSEP as a useful tool in the evaluation of brain-dysfunction in comatose patients.
-
EEG EMG Z Elektroenzephalogr Elektromyogr Verwandte Geb · Jun 1983
[Computer assisted analysis of EEG, evoked potentials, EEG reactivity and heart rate variability in comatose patients].
A multifunctional system for combined evaluation of EEG, visual (VEP), somatosensory (SEP) and auditory brainstem evoked potentials (BAEP) is introduced. For the light stimulation an array of light emitting diodes are used for tactile stimulation a vibration stimulus is applied to he distal digit of one finger. Stimulus-synchronous EEG segments are used for EP averaging and also for quantification of either the blocking or the activation of rhythmic EEG activity. ⋯ VEP were found to be maintained in predominant brain stem disorders. The auditory brain stem potentials and the heart rate variability are of further diagnostic significance. The importance of the individual parameters such as alpha-frequency, VEP, SEP, BAEP and alpha-spindles is demonstrated by follow-up studies in comatose patients.