Human brain

Basic Information
Drugs and brain
The left and the right brain
Brain anomalies

 

How it works
The human brain has 1,000,000,000,000 nerve cells (neurons) that process information. Neurons receive information from other cells through networks called dendrites. Then the neurons send the information in electrical impulses to other nerves. Then the message is passed on to other cells at points of contact called synapses. This causes the release of chemical neurotransmitter. Neurotransmitters are molecules that are used to communicate messages from a transmitting nerve cell to a receiving nerve cell. They spreads out across to another neutron which the neurotransmitter attached itself to and starts a receptor on the neuron and makes another action potential; repeating the cycle. Each neuron has about 1000 synapses so it can receive information from many other cells. If the receptor is clogged or any part of it is missing then one will have trouble communicating.
There are different kinds of neurotransmitters. The main ones are called Noradrenalin, Dopamine, Serotonin, and GABA. There are transmitting and receiving nerve cells that are specially trained to receive and transmit them. For example with the noradrenalin neurotransmitter, two of its receptors are called alpha-1 and alpha- 2. Alfa-1 stimulates liver to sugar molecule conversions, making more glucose blood; it also stimulates consumption of oxygen, this causes energy.


Emotions
Certain chemicals override brain activity and preside over logical thinking. Dopamine produces feeling of bliss when it rushes to the frontal lobes; it lessens pain and increases pleasure. Dopamine is also active in the addictive process.

Norepinephrine, which is actually produced from dopamine, flows through the brain stimulating adrenalin and the pounding of the heart. It is also responsible for alertness and orienting functions. High levels of Norepinephrine help mental focus and muscle performance. Low levels cause anxiety, lack of focus, and sleepiness.


Phenylethylamine, which is also found in chocolate, gives a feeling of bliss. When motivated behavior and arousal activate, caused by chemicals like these, they start the limbic system. This causes less integration with the cortex (gray matter covering the brain), which causing passion or love.

Dopamine also produces oxytocin which stimulates orgasm and feeling of emotional attachment. So people with less oxytocin flow are to have sporadic relationship with emotion detachment. Usually an overload of oxytocin causes a person to experience heavy breathing sweaty palms and flushed skin, means love. After a while the body becomes immune to these chemicals, so people become clingy because they crave these endorphins, that a continuously presence of a partner stimulates. The reason why we crave these endorphins is because they are soothing substances and natural pain killers.

Tryptophan is an amino acid in the blood stream. It competes with other amino acids to enter brain cells. When insulin is produced from carbohydrates, it clears all amino acids except tryptophan. Once tryptophan enters it converts to 5-hydoxytryptophan and then to serotonin. A high level of serotonin causes positive moods, which is why most people enjoy eating sweets and grains. Too much stress can cause low levels of serotonin. Low levels of serotonin can cause depression, insomnia, and aggressiveness. Serotonin usually acts as an inhibitor; preventing certain chemicals to flow that cause theses behaviors. High levels of dopamine and serotonin cause schizophrenia, while low levels of both cause depression.

Dopamine will drive to attraction but lasting relationships increases serotonin. A series of short term relationships will decrease our serotonin levels, but increasing Norepinephrine. Also prayer and meditation also increase serotonin levels.

 

Anatomy

canadian pharmacy: buy generic levitra online