Class 07 Brain Imaging

Class 07 Brain Imaging - Localization of Function Brain...

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Localization of Function: Brain Imaging September 23, 2008
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Outline Modern techniques opposed to the old manner of determining localized neural function (for example, Phrenology) Imaging structure Imaging function PET fMRI
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Franz Joseph Gall (1758- 1828) founder of Phrenology
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Phrenology represented an early attempt to understand the mind and human behavior by linking personality traits or "faculties" to the physical organ of the brain. Phrenologists divided the mind into 35 "faculties" that were ascribed to specific parts of the brain and locations on the cranium, the size and shape of which determined the strength or weakness of each trait. This chart of the head, from Ladies Magazine 1833, was a common sight in pharmacies, magazines, and books. It was also painted on plaster or porcelain busts and carried about by the thousands of phrenologists who crisscrossed the country in the antebellum period.
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Phrenologist view of brain regions
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The head of a convicted criminal from 1890. Attempts to localize criminality in the brain have not been successful.
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From Penfield’s electrical stimulation of the brain surface to map the sensory motor areas of the brain.
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More modern techniques to study localized brain activity and function
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Medical Imaging Techniques CAT X-Ray MRI Anatomy CAT X-Ray MRI
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Types of Tomographs Anatomy Anatomy Computed Tomography (CT) Computed Tomography (CT) Computed Axial Tomography (CAT) Computed Axial Tomography (CAT) Magnetic Resonance Imaging (MRI) Magnetic Resonance Imaging (MRI) Molecule distributions Molecule distributions Positron Emission Tomography (PET) Positron Emission Tomography (PET) Single Photon Emission Computed Single Photon Emission Computed Tomography (SPECT) Tomography (SPECT) Magnetic Resonance Imaging (MRI) Magnetic Resonance Imaging (MRI) Functional Magnetic Resonance Imaging (fMRI) Functional Magnetic Resonance Imaging (fMRI)
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Class 07 Brain Imaging - Localization of Function Brain...

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