FMRI

Question 1

what is FMRI?

Answer 1

brain-scanning technique that measures brain activity by detecting changes in blood oxygenation and flow. When a brain area is more active, it consumes more oxygen, so blood flow increases to that area.

Question 2

strength- high spatial resolution

Answer 2

provides detailed, high-resolution images of brain activity, typically around 1–2 mm = researchers can pinpoint specific brain regions involved in tasks or behaviours with great accuracy = more precise localisation of function compared to older techniques like PET scans. This strengthens the validity of conclusions about which areas are active during particular cognitive tasks.

Question 3

weakness- low temporal resolution

Answer 3

It measures changes in blood flow, which lag behind actual neural activity by several seconds. This delay means it cannot track real-time brain activity well, making it difficult to study the exact timing of neural processes = may not be suitable for research requiring precise measurement of rapid brain responses.

Question 4

strength- Non-invasive and safe

Answer 4

does not use ionising radiation, unlike PET scans. This means it poses minimal risk to participants, making it ethically preferable and suitable for repeated use. Because of its safety, it can be used in both clinical and research settings without harm. This increases its acceptability and usefulness for long-term or developmental studies.