【脑电数据处理】electrophysiology and EEG(AP\LFP\ECoG\EEG)
图片来源EEG Signal Processing and Feature Extraction&Adjamian et al 2014Electroencephalogram (EEG) has been referred to a recording of fluctuating electrical waveforms at the scalp.Electrocorticogram
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| EEG Signal Processing and Feature Extraction&Adjamian et al 2014 |
- Electroencephalogram (EEG) has been referred to a recording of fluctuating electrical waveforms at the scalp.
- Electrocorticogram (ECoG) has been referred to a similar recording obtained directly from the cortex.
- Local field potential (LFP; also known as intracranial EEG) has been referred to a recording from a small-sized electrode inserting in the brain.
All of them are main recordings of postsynaptic potentials from different numbers of neuronal populations.
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| Electroencephalography |
- The patch-clamp technique is used to record action potentials from individual neurons.
Action potentials are short-duration (1 ms), high-amplitude (~100 mV) pulses. - Electrode microarrays can be inserted in brain tissue to record the activity of populations of neurons. Depending on filter settings, one can isolate multi-unit activity (action potentials) or lower-frequency local fi eld potentials (LFPs); the latter of which have spectral characteristics similar to scalp-recorded EEG.
- In electroencephalography (EEG), macroscopic electrodes placed on the surface of the scalp measure the electrical activity of large portions of the brain.
EEG oscillations vary according to the synchronized or desynchronized activity of underlying neuronal populations.
In addition, the signal recorded on the scalp is attenuated and distorted by volume conduction through various intracranial media as well as the scalp.
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