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39 Cards in this Set
- Front
- Back
comparing methods with
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spatial, temporal, invasiveness
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lesions are performed on
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animals, humans, they are temporary
Transcranial Magnetic Stimulation |
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anotomical is?
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CT scan and MRI
White matter tract imaging (DTI) |
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Functional is?
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Single cell or unit recording
EEG/ERP PET and fMRI |
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TMS
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Creates a strong focal magnetic field over the scalp
creates a disturbance of activity near the probe |
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pros of TMS
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reversible, repeatable and relatively non-invasive
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cons of TMS
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not clear what it is doing or exactly where the disruption is
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TMS is used for
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when people do not respond to meds and are depressed
doesn't last long |
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how does CT scan get detected?
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a dye is injected into the blood
series of x rays are made from different angles |
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what doesn't matter for CT scan?
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temporal resolution
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which has a better resolution? MRI or CT?
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MRI
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which is cheaper? CT or MRI?
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CT and it's done first because of that
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which is more invasive? CT or MRI
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CT
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How does MRI work?
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measures the radio-frequency waves emitted by the hydrogen atoms when they are subjected to a strong magnetic field
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which provide a more detailed view of the brain? CT or MRI?
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MRI
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Measures direction of water flow (direciton of axons)
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DTI
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is DTI invasive?
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Noninvasive
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cognitive activity leads to
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increased activity of neurons
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neurons with similar functions do what?
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they cluster together
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what is it called when neurons cluster together
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functional specialization
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neural activity generates electrical signals which are?
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measured by electrophysiological techniques (EEG)
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neural activity leads to
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oxygen consumption
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oxygen consumption leads to
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localized changes in blood flow
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localized changes in blood flow is called
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a hemodynamic response
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localized changes in blood flow are measured by?
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PET or fMRI
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where is single unit recording take place?
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it's planted inside the brain
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what is most often use of single unit recording?
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animal research
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advantages of single unit recording
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could find new findings about what programs uhmans the way we are.
the best temporal results |
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disadvantages of single unit recording
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not going to know the exact spot it happens at
really really invasive |
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What is measured in EEG
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Post Synaptic Potentials in groups of neurons
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How does EEG measure?
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measures the difference between the electrodes
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what type of changes can be measured with EEG?
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sleep-related things, certain neurological disorders like epilepsy
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how are the changes recorded by EEG measured?
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frequency, amplitude, specific wave-types
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Event Related Potential (ERP) uses what setup?
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EEG setup
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EEG does what?
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identifies components of EEG and equates them to specific cognitive/perceptual processes
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ERP has an excellent what type of resolution?
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Temporal
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ERP has a poor what kind of resolution?
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Spatial
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What measures regional cerebral blood flow?
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PET and fMRI
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PET works how?
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inject radioactive tracer, record positrons outside the head
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