Brain Imaging Techniques and Limitations

The video explores how psychologists study the brain using modern scanning techniques. It covers five main methods: EEG, CAT scan, MRI, PET scan, and fMRI. Each technique is explained in terms of its function, advantages, and limitations. EEG measures electrical activity, CAT scans provide structural images, MRI offers detailed soft tissue images, PET scans show brain activity, and fMRI measures blood flow changes. The video concludes with a discussion on the limitations of current imaging technologies and the potential for future advancements.

What was an early method used by psychologists to study the brain?

• Measuring electrical activity

• Injecting radioactive tracers

• Using X-rays

• Measuring head bumps

What does EEG stand for?

• Electromagnetic Graph

• Electroencephalogram

• Electrocardiogram

• Electrostatic Graph

Which condition is commonly diagnosed using EEG?

• Diabetes

• Epilepsy

• Hypertension

• Asthma

What is a major advantage of CAT scans?

• High detail of soft tissue

• Real-time brain activity

• Fast imaging process

• No radiation exposure

What is a limitation of CAT scans?

• Inability to detect tumors

• Poor detail of soft tissue

• High cost

• Slow imaging process

What does MRI use to create images of the brain?

• Ultrasound waves

• Magnetic fields and radio waves

• Radioactive tracers

• X-rays

Why might some people be unable to undergo an MRI?

• Claustrophobia

• Presence of metal implants

• Allergy to contrast dye

• Pregnancy

What does PET scan use to study brain function?

• Magnetic fields

• Radioactive tracers

• X-rays

• Ultrasound

What is the main difference between MRI and fMRI?

• fMRI measures brain function

• MRI is faster than fMRI

• fMRI measures brain structure

• MRI uses radioactive tracers

What is a common limitation of current brain imaging techniques?

• Inability to detect tumors

• Lack of detailed images

• Inability to detect brain activity

• High radiation exposure