Online Lecture 5 - Brain

Online Lecture 5 - Brain - How can I know what the brain...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Psychology 7e in Modules 1 The Brain What’s the deal with left and right brains? Josh Wede Psych 100 How can I know what the brain does? • Neuropsychology – Brain damage to area of the brain • EEG (electroencephalogram) – Record patterns of electrical activity • PET (positron emission tomography) – Radioactive isotopes in the blood flow • fMRI (functional magnetic resonance imaging) – Oxygen content • Non-invasive (except PET) • Maps of brain activity The Brain Techniques to Study the Brain Brain lesion experimentally destroys brain tissue to study animal behaviors after such destruction. Hubel (1990) Clinical Observation Clinical observations have shed light on a number of brain disorders. Alterations in brain morphology due to neurological and psychiatric diseases are now being catalogued. Tom Landers/ Boston Globe Electroencephalogram • EEG • The brain produces electrical activity • Put electrodes on the head Electroencephalogram (EEG) An amplified recording of the electrical waves sweeping across the brain’s surface, measured by electrodes placed on the scalp. AJ Photo/ Photo Researchers, Inc.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Psychology 7e in Modules 2 EEG • Watch the electrical current change through time – Great temporal resolution (milliseconds) – Poor spatial resolution SHE PUT ON HER HIGH HEELED SHOES HE SPREAD THE WARM BREAD WITH SOCKS IT WAS HIS FIRST DAY AT WORK Spatial resolution • You never really know which part of the brain is making the current – Lots of work to improve • Current estimates are about 1 inch PET Scan PET (positron emission tomography) Scan a visual display of brain activity that detects a radioactive form of glucose while the brain performs a given task. Courtesy of National Brookhaven National Laboratories Magnetic Resonance Imaging • MRI Scans: Like an x-ray machine, but can look at soft tissue (like lungs, brain, heart,. .) – Very good spatial resolution
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/23/2010 for the course IST 220 at Penn State.

Page1 / 7

Online Lecture 5 - Brain - How can I know what the brain...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online