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Brain Imaging Techniques and Hemisphere Specialization: An Overview, Lecture notes of Medical imaging

An overview of various brain imaging techniques, including MRI, fMRI, PET Scans, and EEG. It also discusses the concept of hemisphere specialization and its implications for brain function, using examples from neuroscience and psychological research. The document also covers the advantages and disadvantages of each imaging technique and the role of brain plasticity in brain function.

What you will learn

  • What is fMRI and how does it measure brain function?
  • What is the role of hemisphere specialization in brain function?
  • How does brain plasticity impact brain function and imaging techniques?
  • What is MRI and how is it used in brain imaging?
  • What are the advantages and disadvantages of PET Scans in brain imaging?

Typology: Lecture notes

2021/2022

Uploaded on 09/27/2022

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MRI (Magnetic Resonance Imaging)
Magnetic fields and
radio waves
Computer
generated
images
Structures
within the brain
Ie) detect tumors
in the brain
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pf4
pf5
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pf9
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Download Brain Imaging Techniques and Hemisphere Specialization: An Overview and more Lecture notes Medical imaging in PDF only on Docsity!

MRI (Magnetic Resonance Imaging)

Magnetic fields and

radio waves

Computer

generated

images

Structures

within the brain

  • Ie) detect tumors in the brain

Digital MRI XXI

fMRI- Functional MRI First used to study human brain function in 1992 measures blood flow via the different magnetic properties of oxygen in your brain Uses – neuroscience and psychological research

Brain Imaging: PET Scan Positron Emission Tomography

Electroencephalogram (EEG)

Amplified recording of

waves of electrical

activity

Measured by electrodes

placed on the scalp

bonnet contains

electrodes that

monitor impulses

from the brain.

One Brain or Two? Cerebral Hemispheres & Split Brain Theory

Ballerina Test

Left/Right Conflict Your LEFT brain wants to say the actual WORD Your RIGHT brain wants to recognize the COLOR

Brain Lateralization (Normal Brain) 2 halves allows for efficiency of brain tasks. Sex Differences? More males left handed Left/Right handed? 90% of us right handed Not all left handers process speech in their left hemisphere Brain hemispheres excel at certain functions/skills PET Scans

Brain Plasticity Ability to strengthen synapse connection & create new ones in the Central Nervous System. Hemisphere Removal Based on new experiences - Musicians/Athletes/Juggling? Brain Damage? Plasticity is limited!

  • Undamaged neurons may take over for damaged ones.

oLargely conducted by Roger W. Sperry & Michael Gazzaniga oConducted first with animals oCats in a maze o1960s: Epileptic patients had the corpus callosum severed to treat seizures. Split Brain Studies

Gazzaniga & Split Brain Patient

Intelligence level, personality, emotion: unchanged
Right hemisphere is able to comprehend language, although non-verbally
Left is superior in speech
Right hemisphere is superior in spatial tasks & facial recognition.

Findings