Chapter 2 Neuroimaging

Question 1

Structural Neuroimaging that records a series of X-Ray images of the head. The images are used to construct an overall image of brain. It has a relatively low resolution.

Answer 1

Computerized Axial Tomography. CT or CAT Scan.

Question 2

applies a combination of magnetic fields and radio frequency energy waves the brain. Hydrogen atoms respond to the magnetic fields and radio frequency pulses by emitting energy. The machine receives this energy and can tell what part of the brain it came from. A computer can use that information to reconstruct an image of the brain that has high spatial resolution.

Answer 2

Magnetic resonance imaging or MRI

Question 3

A way to image brain function. A patient is injected with a radioactive substance that emits positrons, which then emit gamma rays when they collide with electrons and brain tissue. These gamma rays are detected by the scanner as the radioactive substance in the bloodstream moves throughout the brain. Blood flow to an area of the brain increases when an area is active, so the scan highlights areas of the brain that are being used most while the person is being scanned.

Answer 3

Positron Emission Tomography or PET scanning

Question 4

Focuses on the different responses oxygenated and an oxygenated blood make to magnetic fields and radio frequency energy. It uses blood oxygen level dependent contrast or bold to identify changes in blood flow, and thus identify brain areas that are most active. fMRI allows one to image brain function without having to inject anything and it provides high resolution MRI images at the same time as it provides a functional image.

Answer 4

Functional MRI or fMRI

Question 5

Invented in early 20th century. Mostly about our general approach to perception. Not what they see but how they approach the test. Results coded according to styles/perceptual approaches. Those with similar approaches/illnesses often take same approaches.

Answer 5

Rorschach Inkblot Test