2 Flashcards
(13 cards)
What is the limitation of fMRI in capturing brain activity?
The fMRI cannot capture rapid brain activity, and the blood oxygenation change lags behind neural activity.
Name two reasons why EEG is used.
- To diagnose disorders and monitor them.
- Evaluate other brain conditions.
What are the strengths and weaknesses of EEG?
A strength of the EEG is its temporal resolution, allowing real-time monitoring of brain activity.
A weakness is its spatial resolution, making it difficult to pinpoint the location of brain activity.
What are the purposes of an MRI/fMRI scan?
The MRI generates an image of the brain’s structure to detect abnormalities, while the fMRI measures blood flow to assess brain activity.
What is the purpose of using MRI and fMRI techniques in brain diagnosing?
The purpose is to create detailed images of the brain to identify issues by tracking blood flow and brain activity, and for testing and research.
What does EEG measure?
EEG measures signals and noises inside the brain.
How does MRI affect protons in the brain?
Protons in the brain align with a strong magnetic field, then an external radio frequency pulse unaligns them, and as they realign, they release energy recorded by the MRI scanner.
What can the EEG be used for?
EEG is extremely helpful for researching sleep and accurately timing processes to the millisecond.
What are the strengths and weaknesses of MRI?
MRI is useful for seeing structural differences or activity in structures with high-resolution images. However, it has poor temporal resolution, making it hard to link structure to behavior in real time.
What are the accessibility concerns of using MRI/fMRI scanners?
- You must be near a scanner.
- They are very expensive to run and require affordability for use.
What does EEG measure?
EEG measures the electrical activity in the brain using electrodes on the scalp, capturing both signal (related to cognition) and noise (unrelated electrical activity).
How can neuroimaging techniques address questions in psychological science?
Neuroimaging can monitor brain activity, highlighting specific patterns of thought and behavior.
How do different types of tissue affect brain scans?
Different tissue types have varying compositions, causing different shades on brain scans to differentiate between grey matter and white matter.
