Flashcards
Brain scanning techniques
Flashcards do conjunto (17)
- 1What are the main scanning techniques?fMRI, EEG, ERP, post mortem
- 2What do fMRI's detect?Changes in the blood oxygenation and flow that occur as a result of neural activity
- 3What does the fMRI produce?3 D images showing which parts of the brain are involved in a particular mental process
- 4What do EEG's measure?Brainwave patterns - calculates overall account of brain activity via electrodes
- 5What is an ERP?- A statistical averaging technique, extraneous brain activity filtered out of EEG
- This leaves responses to specific stimulus of a task - 6What is a post mortem?Analysis of the brain after death - parts of the brain are examined
- 7What technique does this image show?EEG
- 8What scan shows this kind of image?fMRI scan
- 9What is this technique called?Post mortem
- 10Strength of FMRI's?They are not harmful to the body - doesnt use radiation
(also has high resolution images, shows clearly how the brain activity is localised) - 11Weakness(es) of FMRI's?- Very expensive compared to other techniques
- The temporal resolution is poor because there's a 5 second lag
- Only looks at blood flow in the brain, cannot home in on individual neurons - 12Strengths of EEG's?- Good at diagnosing conditions like epilepsy
- Unlike FMRI, it has good temporal resolution - 13Weaknesses of EEG's?- Very general, not useful for pinpointing exact source of activity
- 14Strength of ERP's?- Gives precise measurement of cognitive functions
- 15Weakness of ERP's?- Lack of standardisation in methodology between studies so it's hard to confirm findings
- Also its difficult to remove the extraneous material needed - e.g. background noise - 16Strengths of post mortem?- Vital for early understanding of mental process
- Broca and Wernicke relied on post mortems - 17Weaknesses of post mortems?- Cannot find cause and effect because the brain is dead
- Also raise ethical issue of patient consent before death e.g. HM lost his memory
Informações
- Descrição
- Psychology year 2 (Biopsychology) FlashCards sobre Brain scanning techniques, criado por Mollie Thompson em 12-01-2017.
- Criado por
- Mollie Thompson · jan 2017
- Atualizado
- 24 jan 2017
- Visualizações
- 2
- Avaliação