Brain Scanning Techniques Quiz

What is the primary purpose of a CAT scan?

• To show brain activity during specific tasks.

• To provide detailed structural images of the brain.

• To measure blood oxygen levels in the brain.

• To identify areas of high glucose usage.

Which brain scanning technique involves the injection of a radioactive tracer?

• CAT scan

• PET scan

• MRI scan

• fMRI scan

What does an fMRI scan measure?

• X-ray absorption in tissues.

• Glucose usage in brain regions.

• Changes in blood oxygen levels.

• Electrical activity in neurons.

Why can a PET scan only be performed once every six months?

• The process is too expensive.

• It involves exposure to radioactive substances.

• The equipment needs extensive maintenance.

• It uses high doses of X-rays.

Which of the following is NOT a strength of fMRI scanning?

• Non-invasive and does not use radiation.

• Provides real-time images of brain activity.

• Tracks glucose levels to show active areas of the brain.

• High spatial resolution for identifying specific brain areas.

A psychologist wants to study which areas of the brain are active during problem-solving tasks. Which technique should they use?

• CAT scan

• PET scan

• fMRI scan

• EEG

What is a major weakness of CAT scans?

• Cannot provide images of brain structure.

• Exposure to X-rays increases cancer risk.

• Requires participants to remain motionless for hours.

• Cannot identify areas of the brain involved in cognitive tasks.

Which of the following accurately describes PET scans?

• They measure brain structure but not function.

• They provide low-cost imaging for research.

• They display brain activity through changes in glucose levels.

• They use sound waves to create brain images.

A researcher wants to avoid exposing participants to radiation. Which scanning technique should they choose?

• CAT scan

• PET scan

• fMRI scan

• None of these

What do the colours in a PET scan represent?

• Oxygen levels in the blood.

• Density of brain tissues.

• Levels of brain activity.

• Electrical signals in neurons.