Understanding fMRI: Insights and Challenges

What is one of the main advantages of using fMRI over traditional x-rays?

• It exposes the brain to less radioactivity.

• It uses sound waves to create images.

• It provides a 2D image of the brain.

• It is cheaper than x-rays.

What does the BOLD signal in fMRI stand for?

• Blood Oxygen-Level Detection

• Blood Oxygen-Level Dependent

• Brain Oxygen-Level Dependent

• Body Oxygen-Level Detection

What is the role of electromagnets in fMRI machines?

• To produce sound waves

• To generate light

• To create a magnetic field

• To cool down the machine

Why is it challenging to keep a person still during an fMRI scan?

• The machine is very noisy.

• The scan is very quick.

• The scan requires lying still for a long time.

• The machine is very cold.

What is a voxel in the context of fMRI?

• A 2D pixel

• A type of software

• A 3D pixel

• A type of brain cell

Why is it important to adjust fMRI images for head motion?

• To make the images look more colorful.

• To ensure the images are aligned correctly.

• To reduce the cost of the scan.

• To increase the speed of the scan.

What was the humorous example of a false positive in fMRI research?

• Detecting brain activity in a rock

• Detecting brain activity in a dead salmon

• Detecting brain activity in a plant

• Detecting brain activity in a computer

What was a major issue found in fMRI software packages?

• They were too expensive.

• They were too slow.

• They inflated false positive rates.

• They were not user-friendly.

What is a potential consequence of not using statistical analysis in fMRI research?

• Higher chance of false positives

• Decreased number of images

• Increased accuracy of results

• Lower cost of research

What is the recommended approach when interpreting fMRI study results?

• Combine fMRI data with other methods.

• Rely on a single study for conclusions.

• Ignore statistical analysis.

• Only use fMRI data.