Neurons are cells that are part of the nervous system. They generate and transmit electrical signals. Millions of neurons are densely packed into different regions of the brain in which each region is responsible for a specific function. Some regions of the brain interact with the outside world, such as interpreting vision, hearing, and other sensory inputs to help us figure out what to do and say. Other regions of the brain interact with our internal world — our body — in order to regulate the function of our organs. For the multiple regions of the brain to do their job, they must be connected to one another with extensive “wiring.” These wirings are called neural pathways, they transmit information from one brain region to another. Each neuron releases a small amount of a specific neurotransmitter into the synapse and stimulates the next cell in the pathway.Neurons change over time due to the development and maturing during adolescent years in an individual’s life. As an effect of a brain injury, neurons also tend to change and repair themselves, this includes the neurons re-wiring according to the injury. The brain’s ability to change and adapt is called Neuroplasticity. Neuroplasticity causes physiological changes in the brain that happen as the result of our interactions with our environment. The brain develops until the day we die; the connections among the cells in our brains reorganize in response to our changing needs.Scientists have discovered that the absence of specific neurotransmitters cause many disorders, such as anxiety, mood disorders, anger-control problems, and obsessive-compulsive disorder.ADHD is resulted from the deficiency of a specific neurotransmitter — norepinephrine. Like all neurotransmitters, norepinephrine is synthesized within the brain.When children are prescribed stimulant medication for ADHD, such as Ritalin or Adderall, the level of a chemical in their brains called dopamine increases. This is critical to the ability to concentrate and focus. This process takes place by the blocking the action of dopamine transporter, a molecule that removes dopamine from the neural pathway. So changing the level of dopamine in the brain definitely changes the way it functions while you’re taking the medication, which is the whole point in taking it. At the level they are prescribed for ADHD, these medications do not raise the dopamine level high enough to produce euphoria, and they are not considered addictive.To become more intelligent, one would need to continue to train your brain constantly. Training refers to learn and take in new important material one should know. No matter your starting point, you can gain knowledge and be more open to learning. To be more intelligent, someone needs to understand what they’re goal is and challenge themselves. Being creative can make things more interesting. If people are interested in something and learn about it, it will likely be remembered more than something they are not interested in. There are lists of activities that can grow your brain. One of the many include intermittent fasting. Intermittent fasting has a huge effect on the entire body. Eating revives the body and it goes into a stage to build up. Here, people are anabolic in nature and store nutrients and toxins. This stage is essential for building cells and tissues while breaking off old cells. The most suggested way to fast is by eating breakfast and dinner twelve hours apart Another way to grow your brain is novelty and learning new things. New things that we don’t know about are seems to grab our attention. This causes interest and increases our learning skills. Novelty, such as dopamine (“reward chemical”) is related to motivation. The brain reacts to novelty by letting dopamine out and making us want to seek new things in return of a reward such as new knowledge. For example, new words in a video game can motivate people so that it is easier to play and survive the game longer. Dopamine paths are operated when exposed to novelty, and it looks like the blue part of the brain: “We thought that less familiar information would stand out as being significant when mixed with well-learnt, very familiar information and so activate the midbrain region just as strongly as absolutely new information. That was not the case. Only completely new things cause strong activity in the midbrain area” is how Dr Düzel explained novelty.