Question
Watch this animation (http://openstaxcollege.org/l/braindevel) to examine the development of the brain, starting with the neural tube. As the anterior end of the neural tube develops, it enlarges into the primary vesicles that establish the forebrain, midbrain, and hindbrain. Those structures continue to develop throughout the rest of embryonic development and into adolescence. They are the basis of the structure of the fully developed adult brain. How would you describe the difference in the relative sizes of the three regions of the brain when comparing the early (25th embryonic day) brain and the adult brain? (http://openstaxcollege.org/l/hugebrain) in which the author explores the current understanding of why this happened.
Answers
The three regions (forebrain, midbrain, and hindbrain) appear to be approximately equal in size when
they are first established, but the midbrain in the adult is much smaller than the others-suggesting
that it does not increase in size nearly as much as the forebrain or hindbrain.   Your Comment




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