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lecture 7 Terry Jernigan

lecture 7 Terry Jernigan - Terry Jernigan Structural brain...

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Terry Jernigan Structural brain imaging is a window on postnatal brain development 1.) Old view of human brain structure a. All neurons are present at birth. All neurogenesis is present in the neonatal b. Myelination of fibers occurs rapidly over the first few years of life. i. Myelination: fatty coating around axon that changes the properties. More efficient. c. Brain structure if adult at approximately age 5 d. Brain morphology, anatomically characteristics, is stable during late childhood, adolescence and adulthood e. Regressive changes of old age begin after 60. i. You can really give an estimate of the age of the brain by the mri 2.) Image Analysis for brain morphometry a. Stripping: Isolation of brain areas. Eyes, scalp, b. Bias correction to reduce signal inhomogeneity c. Tissue segmentation d. Anatomical segmentation 1. These techniques allowed for new improved views a. Age-Related alterations did not set in at 60. Instead it was dynamic the entire life and never ceased to change. But
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