Till now we have seen some topics such as:-
- How to change your mindset to improve your health
- How to find opportunity in difficulties
- How to walk away when things are not happening the way you want
It is possible to rewire our brains. Now for a long time, it was believed that the brain was a static organ. There was an idea that it develops during a certain stage in your life, and then it stays the same throughout life and it doesn’t change. We now know that it is a constantly changing dynamic organ. These changes occur in response to our experiences and behaviours.
With advancements in technology, we know a lot about the brain and nervous system now, as compared to 100 years ago. Now in the era of modern technology, we have ways and means of looking into the brain, and one of the ways are familiar tests like the CT scan, the MRI Brain, and a more sophisticated functional MRI. Also, there are many other sophisticated tests like the PET ( positron emission tomography) scan, and another test called a SPECT scan. These tests help us to know the structure and understand the function of the brain even as it is performing a task
Detecting brain damage in earlier days:
Brain function used to be guesswork. We would look at the damaged portion then correlate it with the symptoms that they showed and conclude that this part of the brain is performing that function. This was very inaccurate and an indirect way, but at least we knew that if a particular part of the brain is damaged a particular function will suffer.
Detecting brain damage nowadays:
Things have changed tremendously in the past 50-60 years. We have learned a lot more, thanks to genetics. The field of genetics has expanded since the mapping of human chromosomes. The field of genetics has exploded.
For example, in autism, or ADHD, we were not sure, which part of the brain was affected, but now we can know that a specific part of the brain is affected. We can also find out whether it is a structural abnormality or just a functional abnormality which is causing the condition.
Development of Brain – Few Things That Happens
When your brain develops, the first thing that happens is the formation of nerve cells. When the ovum and sperm unite they form a zygote and this zygote has got stem cells. What happens next is that the stem cells’ first multiply themselves. Then, these stem cells differentiate and develop into different kinds of tissues forming bones, heart, liver, brain, skin, lungs etc. In this differentiation process, certain cells are given the job of developing brain cells. The development of stem cells into nerve cells is called neurogenesis. Once the nerve cells form, they start to multiply in number until the formation of a complete brain. The stages of brain development from the zygote are:
- Differentiation of the stem cells
- Growth of nerve cells
- Neuronal differentiation
How the nervous system starts developing into the brain
The human nervous system begins to take shape very early in embryonic development. At the end of the gastrulation phase, an elongated structure called the notochord is developed.
The notochord then sends a signal to the layer of cells directly above it (ectoderm), causing some of these cells to form the first structure from which the nervous system originates: the nerve plate. This is the beginning of the development of the human nervous system, and the process called neurulation.
In the next phase of neurulation, the edges of the nerve plate begin to bend inward, forming nerve grooves. This groove immediately closes completely, forming a neural tube through which the entire brain and spinal cord will develop.
Dr Prithika Chary, first and only lady neurophysician cum neurosurgeon in India explained every detail about the formation of your amazing brain. Watch the video to know more.