Imaging + Neuroprosthetics Flashcards
1
Q
What are local field potentials?
A
- Primarily comes from synaptic potentials (e.g. EPSP and IPSP) from many neurons firing together
- Action potential durations are short (high frequency) while LFPs have slower fluctuations in voltage (lower frequency)
2
Q
Electrocorticography (ECoG)
A
- Electrodes placed on surface of cortex (invasive)
- Used to monitor origin of seizure activity in brain
- Has been used for cog neuroscience
- High spatial + temporal acuity
3
Q
Electroencephalography (EEG)
A
- Measures changes in voltage non-invasively
- Difficult to measure high frequency activity (action potentials) but picks up slower fluctuations (e.g. LFPs)
- Worse spatial acuity than ECoG
4
Q
Magnetoencephalography (MEG)
A
- Also non-invasive
- Measures magnetic fields instead of electrical fields
- Spatial acuity of recording is better than EEG, but its more expensive
