PSY 2105 Lecture Notes - Lecture 6: Functional Magnetic Resonance Imaging, Transcranial Magnetic Stimulation, Diffusion Mri

• School: University of Ottawa
• Department: Psychology
• Course: PSY 2105
• Professor: Julie Desjardins

Document Summary

Technologies and methods that enable scientists to generate functional maps of brain activity through measurements of changes in either the brain"s metabolism, blood flow, or electrical activity. Three categories: measure electrical brain activity, distinguish physical structure of brain, assess the functional and metabolic activity of brain. Measures rhythms of electrical activity of neurons under stimulus conditions. Measures electrical activity of specific brain areas in response to a particular stimulus or action. Magnetic field generated by electrical currents are detected by sensors on scalp. Application of an external magnetic field at specific locations on the scalp to disrupt the underlying electrical activity. Anatomical structure of the brain is imaged by the creation of a large magnetic field that interacts with molecules in the body. Measures the diffusion or movement of water molecules through neural tracts that connect brain structures. Measures metabolic activity through the injection of radioactive positron-emitting isotopes. Determines the functionality of brain structures with the use of powerful magnets.