PS263 Lecture Notes - Transcranial Magnetic Stimulation, Electrodermal Activity, Ct Scan
Document Summary
5. 1 methods of visualizing & stimulating the living human brain. X-ray computed tomography: ct is a computer-assisted x-ray procedure that can be used to visualize the brain and other internal structures of the living body. Positron emission tomography: pet was the first brain imaging technique to provide images of brain activity rather than images of brain structure: i. e. , radioactive deoxyglucose is injected into patients carotid artery. Functional mri: fmri produces images representing the increase in oxygen flow in the blood to active areas of the brain. Signal recorded is the bold (blood oxygen level dependent). Magnetoencephalography: meg measures changes in magnetic fields on the surface of the scalp that are produced by changes in underlying patterns of neural activity temporal resolution: can record fast changes in activity. Transcranial magnetic stimulation: tms is a technique for affecting the activity in an area of the cortex by creating a magnetic field under a coil positioned next to the skull.
