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What do intracerebral electrodes measure?
- Source :
- Clinical Neurophysiology. 132:1105-1115
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Objective Gain insight and improve our interpretation of measurements from intracerebral electrodes. Determine if interpretation of intracerebral EEG is dependent on electrode characteristics. Methods We use intracerebral EEG measurements differing only in the recording electrodes (Dixi or homemade electrodes), and numerical simulations to determine the spatial sensitivity of intracerebral electrodes and its dependence on several parameters. Results There is a difference in the high frequency (>20 Hz) power depending on the electrode type, which cannot be explained by the different contact sizes or distance between contacts. Simulations show that the width of the gap between electrode and brain and the extent of the generators have an effect on sensitivity, while other parameters are less important. Conclusions The sensitivity of intracerebral electrodes is not affected in an important way by the dimensions of the contacts, but depends on the extent of generators. The unusual insertion technique of homemade electrodes resulting in a large gap between functional brain and electrodes, explains the observed signal difference. Significance Numerical simulation is a useful tool in the choice or design of intracerebral electrodes, and increases our understanding of their measurements. The interpretation of intracerebral EEG is not affected by differences between typical commercially available electrodes.
- Subjects :
- Materials science
Models, Neurological
Sensitivity and Specificity
Signal
Measure (mathematics)
050105 experimental psychology
03 medical and health sciences
Functional brain
0302 clinical medicine
Physiology (medical)
Humans
0501 psychology and cognitive sciences
Sensitivity (control systems)
Cerebral Cortex
Epilepsy
Computer simulation
05 social sciences
Electroencephalography
Sensory Systems
Electrodes, Implanted
Neurology
Electrode
Intracerebral EEG
Neurology (clinical)
030217 neurology & neurosurgery
Biomedical engineering
Subjects
Details
- ISSN :
- 13882457
- Volume :
- 132
- Database :
- OpenAIRE
- Journal :
- Clinical Neurophysiology
- Accession number :
- edsair.doi.dedup.....1088952b4b4165b71e536ecba48e8a25