PSYC 100 Lecture 11: Neuroscience Methods

• School: Queen's University
• Department: Psychology
• Course: PSYC 100
• Professor: Jordan Poppenk

Document Summary

Detects presence of a radioactive substance in the brain that is injected into the bloodstream, then pulled in by active brain tissue. Measures changes in oxygen levels in the brain. Good (but not as good as dissection studies (electrical activity picked up from anywhere in the brain) Shines infrared light into the brain, measures light that comes back out. Light changes when it passes through oxygenated blood and active neurons. Placed in magnetic field 66 000 times greater that earth"s, causing atoms in the body to line up and give off electromagnetic energy. A machine measures the energy to produce a 3d energy. Invasive, places eeg electrodes directly on the brain (more precise than when measuring from scalp) Uses sensors near scalp to measure the current produced by weak magnetic field associated with neural activity. Not susceptible to distortions of the skull and scalp.