第6章

ニューロンの情報伝達には
軸索シグナル伝達（axonal signaling）と樹状突起結合（dendritic integration）がある。

Invasive neurophysiology
単一ユニット記録（Single Unit Recording）

Pro
Direct information more than any techniques
Temporal resolution is high
Cons
Limits its use to non-human animals
Data collection is slow, labor intensive
Cost to keep animal increase as month/years

Electroencephalography (EEG)
Pro
non invasive, inexpensive
high-temporal resolution
Cons
Spatial localization (difficult to identify)
considerable set up time
EEG signal attenuated by scalp and skull
changes in activity over time=OK
changes in activity over space=NG

Magnetoencephalography (MEG)
neuron-electricity-magnetic field
superconducting quantum interface devices (SQUIDs)
-270℃ super sensitive
high temporal resolution > PET/fMRI
good spatial localization
less commonly used in neuroeconomics research

Pro
non-invasive=well tolerated by human participants
can record data from the entire brain simultaneously
can provide combined location and timing
Con
expensive $2-3M and # is limited
fMRI=standard clinical MRI=can recover cost by patients
 only sensitive to neurons oriented parallel to the skull
Spatial resolution > EEG
can penetrate scalp and skull

PET
Pro
very precise
Con
invasiveness- injecting ratio active material into participants
temporal resolution is low
spatial resolution 

fMRI
Pro
widespread acceptance among researchers
visibility to the general public
good combination of spatial and temporal resolution

Cons
expensive $500-$1000/h
health risk for participants
breath/heartbeats=noise