Neuroscience methods 1 Flashcards
Explain Positron Emission Topography (PET)
A contrast is injected into the bloodstream which attaches to blood molecules that are eventually absorbed by active neurons.
We observe the active neurons that use the oxygenated blood which needs to be replenished.
What are the advantages of X-ray
You can image bone
What is tomography
Visualisation by sections through imaging which is then converted to viewable 3D volumes and 2D sections
What does EEG measure
Firing in populations of neurons
What are the main diagnostic uses of EEG?
Epilepsy and sleep disorder
What is the neuronal activity measured by an EEG
Postsynaptic potentials at the dendritic end of pyramidal neurons
What is the standard electrode placement
International 10-20 system
What is the Gamma range and behavioral correlate
30-50 Hz
Active corticial processing
What is the Beta range and behavioral correlate
13-30 Hz
Motor Activity
What is the Alpha range and behavioral correlate
8-13 Hz
Occipital region when eyes closed
What is the Theta range and behavioral correlate
4-8 Hz
Attention and memory processes
What is the Delta range and behavioral correlate
0.5-4 Hz
Sleep
What is the inverse problem in EEG
It is impossible to source the location of neural activity from an EEG measurement
Does EEG have good time resolution
Yes
Does EEG have good spatial resolution
No
