Brain Structure and Function: Tools and Insights
Topic 2.7- Tools for Examining Brain
Structure and Function
How do we learn about the brain?
•
Accidents: Phineas Gage had a steel rod blasted through his
frontal lobe. Later, his personality dramatically changed.
What did scientists learn from this?
Thi
s
Ph
oto
by
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kn
ow
n
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tho
r is
lic
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un
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r
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C
BY
-
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C-
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Lesions
Cutting into the brain and looking for change.
Brain tumors also lesion brain tissue.
Less Invasive ways to study the Brain
•
Electroencephalogram
(EEG)
•
Computerized Axial
Tomography (CAT)
•
Magnetic Resonance
Imaging (MRI)
•
Positron Emission
Tomography (PET)
•
Functional MRI (fMRI)
Our Divided Brain
C
orpus Callosum
large band of
neural fibers
connects the
two brain
hemispheres
carries
messages
between the
hemispheres
Split-Brain Patients
•
Since the Corpus Callosum
attaches the two
hemispheres of the cerebral
cortex, when it is removed,
you have a split-brain
patient.
•
https://www.youtube.com/watc
h?v=8cOBt5fxS3Y
Split Brain
“
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w
.
”
Our Divided Brain
The information
highway from the
eye to the brain
Meet Joe, a split-
brain patient who
worked with Dr.
Michael Gazzaniga
https://www.youtube
.com/watch?v=aCv4K
5aStdU&list=WL&ind
ex=2&t=0s
Discover how scientists study the brain through accidents like Phineas Gage's, lesions, and advanced techniques like EEG, CAT, MRI, PET, and fMRI. Learn about the divided brain, split-brain patients, and the role of the corpus callosum in communication between brain hemispheres.
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Presentation Transcript
Topic 2.7- Tools for Examining Brain Structure and Function
How do we learn about the brain? Accidents: Phineas Gage had a steel rod blasted through his frontal lobe. Later, his personality dramatically changed. What did scientists learn from this?
Lesions Cutting into the brain and looking for change. Brain tumors also lesion brain tissue.
Less Invasive ways to study the Brain Electroencephalogram (EEG) Computerized Axial Tomography (CAT) Magnetic Resonance Imaging (MRI) Positron Emission Tomography (PET) Functional MRI (fMRI)
Our Divided Brain Corpus callosum Corpus Callosum large band of neural fibers connects the two brain hemispheres carries messages between the hemispheres
Split-Brain Patients Since the Corpus Callosum attaches the two hemispheres of the cerebral cortex, when it is removed, you have a split-brain patient. https://www.youtube.com/watc h?v=8cOBt5fxS3Y
Split Brain What word did you see? or Point with your left hand to the word you saw. Two words separated by a dot are momentarily projected. Look at the dot.
Our Divided Brain The information highway from the eye to the brain Meet Joe, a split- brain patient who worked with Dr. Michael Gazzaniga https://www.youtube .com/watch?v=aCv4K 5aStdU&list=WL&ind ex=2&t=0s
