Brain Awareness Week 2012: Difference between revisions
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==Second Trimester - Fetal brain '''Grows'''== | ==Second Trimester - Fetal brain '''Grows''' in Size== | ||
[[File:Brain ventricles and ganglia development 03.jpg|800px]] | [[File:Brain ventricles and ganglia development 03.jpg|800px]] | ||
{| | {| | ||
| This | | This Scan of the living brain, shows the growth that occurs during the second trimester (red bar top right is 1 cm). | ||
* The brain goes from having a smooth surface to begin to fold or "wrinkle" as the surface area grows. | * The brain goes from having a smooth surface to begin to fold or "wrinkle" as the surface area grows. | ||
* The fluid space is filled with '''cerebrospinal fluid''' or '''CSF'''. | * The fluid space is filled with '''cerebrospinal fluid''' or '''CSF'''. | ||
[[File:Dev_anat_01.jpg]] | |} | ||
==Third Trimester - Fetal brain '''Grows''' in Surface Area== | |||
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| [[File:Dev_anat_01.jpg]] | |||
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[[File:Salt_shaker.jpg]] | [[File:Salt_shaker.jpg]] | ||
<center>'''Why do we need this?'''</center> | <center>'''Why do we need this?'''</center> | ||
==Week 40 on - Newborn brain '''Grows'''== | ==Week 40 on - Newborn brain '''Grows'''== |
Revision as of 09:25, 18 March 2012
Welcome to Brain Development
width=320px|height=260px|controller=false|autoplay=true</qt> | In today's demonstration we will be looking at how the brain develops from a simple tube into the complex folded structure that you will be seeing (and using) today.
This page has been prepared as a simplified introduction to human neural development. The second part of the demonstration will cover comparative anatomy of the brain. |
Here is Human Development
This graph shows how we divide human development into different times. Key events occur in the first trimester (embryonic), though the neural system continues to develop through the second and third trimester (fetal) and even after birth (postnatal). This is why it one reason why it is so susceptible to damage.
Week 3 - It begins as a Plate
Week 4 - That folds to a Tube
The tube then Closes at each End
These images show the neural tube closing leaving an opening (neuropore) at each end.
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Week 6 to 8 - The brain end of the tube forms 3 Vesicles
Brain
width=516px|height=540px|controller=true|loop=true|autoplay=true</qt>
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Week 6 - the brain and spinal cord of the human embryo. Also visible are the heart (bright white) and placental cord containing placental blood vessels. |
Spinal Cord
At the spinal cord end - the tube stays narrow. This region begins to put out motor nerves to innervate muscle and sensory nerves grow towards the developing spinal cord.
Second Trimester - Fetal brain Grows in Size
This Scan of the living brain, shows the growth that occurs during the second trimester (red bar top right is 1 cm).
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Third Trimester - Fetal brain Grows in Surface Area
Week 40 on - Newborn brain GrowsThe brain has not finished growing at birth. Growth you can see! Much of the growth in size after birth is due to "white matter" development, the support cells of the brain, spinal cord and nerves. The skeleton containers of the nervous system, the skull (brain) and vertebral arch (spinal cord), are still flexible and can expand as the nervous system grows in size.
At the level of cells (neurons), the brain and spinal cord are continuing to make and break connections as the nervous system is remodelled with learning. Here is how the human nervous system grows
Here is a developing mouse nervous system
Comparative Brain AnatomyIn today's demonstration you will also see some models of brains from different species. Each coloured part on the brain models shows a different brain region each with a different function. Each brain region is the same colour (code) in all models.
(Link to Detailed Information, not part of demonstration) About Brain Awareness Week
More K12 Development Topics
More Detailed Neural DevelopmentGlossary Links
Cite this page: Hill, M.A. (2024, April 25) Embryology Brain Awareness Week 2012. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Brain_Awareness_Week_2012
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