University:
York University
Course:
AP/SOSC 3118 | Drugs And Society
Academic year:

2024
Views:

133

Pages:

2
Author:

Nick T.

Brain Imaging Techniques: MRI magnetic resonance imaging or MRI technique that uses powerful magnets to determine the amount of hydrogen atoms at different locations in the body • benefits provides a high-resolution image of the brain's anatomy - is noninvasive • limitation provides no information about brain functioning Positron emission tomography or PET - A radioactively labeled chemical is injected into the bloodstream, and a computerized Scanning device then maps out the relative amounts of the Chemical in various brain regions • benefit - provides a direct measure of brain activity and an indirect measure of potential toxicity to specific neurons limitations requires the injection of radioactive materials - does not provide information about brain Structures • Functional magnetic resonance imaging or fMRI -provides real-time information about Changes in brain blood flow as an individual Speaks about his/her mood or performs behavioral or cognitive tasks • benefits - gives real-time information about Changes in brain blood flow - noninvasive • limitation - does not provide any information about the anatomy of the brain Quiz Questions • whether the effect of a neurotransmitter is excitatory or inhibitory depends on: a) blood sugar levels b) the type of the receptor c) the rate of Synthesis d) enzyme actions • It is possible to have an action potential that is relatively small in magnitude (if few Channels are open) - True or False