Class Notes (807,198)
Canada (492,663)
Psychology (6,022)
Psychology 1000 (2,405)
Dr.Mike (1,196)
Lecture 8

Lecture 8 - Split Brain.docx

3 Pages
Unlock Document

Western University
Psychology 1000

Psychology 1000 Split Brain October 2, 2012 Next Time: Genetics Scan: P 109-116  How are the cortical areas organized?  What happens if these areas are damaged?  Is there a separate consciousness in each hemisphere? Neuron A and Neuron B synapse with Neuron C. You are measuring the electrical activity in Neuron C. When Neuron A fires, an action potential is generated in Neuron C. But when both A and B are stimulated, there is no action potential observed in C. How can you explain this? a) The neurotransmitter in B is Ach b) Neuron A is disinhibited c) Neuron B generates an IPSP d) Neuron B depolarizes the post-synaptic membrane e) Measurement error Projection Areas 1. Topographic Representation  Mapping on the brain’s surface that corresponds to the body and everything you could possibly move on the motor cortex 2. Contralateral Control  There is opposite side control in each of the hemispheres  Left hemisphere controls right side of the body and vice versa 3. Functional Assignment of Space  There isn’t an equal distribution of space -> some parts of the body get more cortical tissue than others  The more functionally important an area is, the more space it gets in the motor cortex How do we get this information  Scan the intact brain and get information about what’s going on  Evidence from brain damage  Direct stimulation of the cortex Scans:  Angiogram  Take an x-ray of the brain and enhance areas of the brain with a dye  Helps to see if someone had a stroke or if there’s a blood clot in the brain  Doesn’t show detailed structure or anything about function, just shows where the blood vessels are and whether or not they’ve been damaged  Cat scan  X-rays from 360 degree rotation Psychology 1000 Split Brain October 2, 2012  Ventricles are spaces in the cortical mass that allow for things like the flow of vessels, cerebral spinal fluids to flow  They are important, but they shouldn’t be huge.  MRI or fMRI  Magnetic Resonance Imaging  Exposed to a really strong magnetic field  When the brain is exposed to the magnetic field, there will be a shift in electron orbits so we can get very good structural information; clear imaging  Almost as good as anatomical dissection in terms of liability to pull the information out  fMRI combines with functionality of PET scans, so that you can see which areas are picking up glucose  For detailed work and important things, do an fMRI  PET scan  Positron emission topography  Injects radioactive glucose  Finds which neurons pick up the radioactive glucose  The more
More Less

Related notes for Psychology 1000

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.