Dopamine

Dopamine is chemically expressed as C2H11NO2.
It is a neuro-chemical created in various parts of the brain and is critical for all kinds of brain functions including thinking, carrying, sleeping, mood, Attention, motivation, seeking and rewarding.
The dopamine is responsible for the feeling of pleasure.
When a person eats, drinks or performs a pleasurable action, dopamine is stimulated in his brain to repeat the action.
Unexpected rewards increase the activity of dopamine neurons, acting as positive feedback signals for the brain regions associated with the preceding behavior.
As learning takes place, the timing of activity will shift until it occurs upon the cue alone, with the expected reward having no additional effect.
- And should the expected reward not be received, dopamine activity drops, sending a negative feedback signal to the relevant parts of the brain, weakening the positive association

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