Neuroscience methods 2 Flashcards
What is a T1 image
An image of brain anatomy.
Resolved from an MRI when hydrogen protons return to normal magnetism
What is DTI used for
Mapping white matter & brain connectivity
What is fMRI used for
Mapping brain activation
What is MRS used for
Mapping metabloic activity
How does TMS work?
A coil induces a magnetic field that induces an electrical field in the brain and causes ells to fire
What is TMS
Trans-magnetic stimulation.
A non-invasive method of stimulating cortical tissues by administration of a brief magnetic pulse to the scalp
What is BOLD
Blood Oxygen level dependence.
A measure of ration of oxygenated to deoxygenated blood
What is a T2 image
An image of connectivity through the fluid (CSF) in the brain resolved when the hydrogen protons relax their spinning
Does EEG have better spatial or temporal resolution
Temporal
Does fMRI have better spatial or temporal resolution
Spatial
What connections does fMRI measure
functional connections between brain regions
What connections does DTI measure
Structural connections between brain regions
What is temporal resolution
The time course of various neural events
What is spatial resolution
Ability to discern elementary units of activated brain networks
Who should not use TMS
- People with a history of seizures
- People with metal in the head
- People with history of serious head injury
Explain the trade-off in network connectivity in the brain
Regular networks have low metabolic cost but low efficiency
Random networks have high metabolic cost but high high efficiency