Brain Imaging Techniques

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Electroencephalogram (EEG)

Presentation transcript:

Brain Imaging Techniques The Case of Phineas Gage - lesioning

Electroencephalogram (EEG) Shows brain waves (levels of consciousness, activity levels) No structure or function

Magnetic Resonance Imaging (MRI) Shows structure of brain Does not show function or areas of activity

CAT Scan (computerized axial tomography) X-ray cross-sections of brain Structure but no function

PET Scan (positron emission tomography) Inject patient w/substance that traces oxygen/blood flow/glucose Shows activity in areas of the brain (indicates function) Does not show structure

Sept. 12th Finish brain imaging Note quiz Parts of brain activity HW: just the reading on the calendar (no video)

fMRI (functional MRI) Combines MRI & PET scan Shows both structure & function

MEG Scan (Magnetoencephalography) Maps brain activity through magnetic fields Shows brain activity & function, non-invasive, fast Often used to find the location of origin for seizures