Compare and contrast the function and implementation of three methods for viewing the brain and its activity.

Question

What will be an ideal response?

Answer 1

Students will compare three of the following:
EEG: This is a measure of electrical activity produced by neurons when they send their messages to other neurons. It involves placing electrodes on the surface of the person's head, where brainwaves can be recorded. It is a method to measure function in the brain.
PET: The PET scan involves injecting the individual with a dye that is radioactive and attaches to glucose. It then reflects areas of the brain where there is increased activity as the glucose is taken up by brain cells that need the energy. It is a method to measure function in the brain
fMRI: This uses the MRI technology by showing differing levels of electrical activity in the brain of patients while they are performing specific tasks. This technique is unique because it also gives you a picture of the brain, revealing its structure. Therefore, it is a method that can be used to observe both structure and function.
CT: A CT scan combines the use of X-rays and computers to generate a three-dimensional picture of the brain. It can be used to look for abnormalities in the structure of the brain.
MRI: A magnetic resonance image generates a three-dimensional computer image of the brain but provides better contrast and detail than the CT. The MRI is very good at showing the internal detail of the brain.