Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
Schwarz, G; Pfurtscheller, G; Kopp, W; Litscher, G; Druschky, K; List, WF.
Multimodal evoked potentials and heart rate variability in comatose patients. 2. Visual evoked potentials and computed tomographic findings
EEG-EMG-Z ELEKTROENZ ELEKTROM. 1988; 19(2): 65-70.
Web of Science
PubMed
- Führende Autor*innen der Med Uni Graz
- Schwarz Gerhard
- Co-Autor*innen der Med Uni Graz
- Litscher Gerhard
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- Abstract:
- Visual evoked potentials (VEPs) were examined as an integrated parameter in a multimodal EP study of brain bioelectrical activity in 33 comatose patients (Glasgow Coma Score 3-6) after craniocerebral trauma. Recordings were performed not only from the occipital (01-02) but also from the central (Cz-C3, Cz-A1, Cz-C4) and frontal (F3-F4) areas. The results show an attenuation of the vertex VEP (SNR 3.2 +/- 1.7) and an increase in the occipital VEP (SNR 4.8 +/- 2.3) as compared to the control group (SNR vertex 7.0 +/- 3.0/SNR occipital 3.9 +/- 2.0). In addition, 16 of the comatose patients showed a very considerable loss of the normally polyphasic character of the occipital VEP in favour of a potential that looked almost monophasic; this was either left or right dominant, and was recorded as a negative or positive potential, respectively, in bipolar recording (01-02). Comparison of the electrophysiological and computer tomography findings showed a laterally correlated change in the occipital VEP: contralateral to the injured hemisphere, the VEP was dominant, ipsilateral it was reduced or extinguished.
- Find related publications in this database (using NLM MeSH Indexing)
- Adolescent -
- Adult -
- Brain Injuries - complications
- Child - complications
- Coma - etiology
- Evoked Potentials, Visual - etiology
- Female - etiology
- Humans - etiology
- Male - etiology
- Middle Aged - etiology
- Tomography, X-Ray Computed - etiology