Summary: Neuroimaging
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Read the summary and the most important questions on Neuroimaging
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Introduction Herman
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What is the goal of cognitive neuroscience?
To map the information-processign structure of the human mind onto the physical organization of the brain. -
What is the smalest unit of information processing and how many are there?
The neuron, 100 billion -
What are the spatial and temporal domains of the brain?
Spatial:
Molecular
Cell/synapse
Gyri/sulci
Brain regions
Lobes
Hemisphere
Temporal:
Action potential (ms)
Hemodynamics (s to min)
Lesions -
What are the spatial and temporal domains of EEG/MEG and fMRI?
EEG/MEG: brain - lobe - maps in ms to s
fMRI: brain - lobe - maps - nucleus ~ layer in several s to a day -
Give 4 paramerers used in ERP statistical analyses.
Peak amplitude, peak-to-peak amplitude, mean amplitude, onset latency -
What is most glucose in the cortex used for?
80-90% of total cortical glucose usage is accounted for by glutaminergic neurons. -
Lecture 1 EEG
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What is recorded with EEG?
Voltage differences on the scalp. -
what is the temporal domain of the brain?
- Action poten1als (ms)
- MEMBRANE POTENTIAL
- Hemodynamics (s - min)
- Lesions (/ recovery)
- Action poten1als (ms)
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where the spontaneous EEG is helpful?
The spontaneous EEG can be helpful in clinical environments,
e.g. for diagnosing epilepsy or tumors, detecting abnormal brain states or classifying sleep stages. -
What is event-related potential (ERP) and what is the main advantage of this method?
It's the avarage EEG of many trials following a stimulus. Due to the averaging, the noise is canceled out.
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