Alcohol stimulates the brain’s hunger centre in the hypothalamus. After you drink alcohol, your appetite may increase. Alcohol also influences the brain’s reward system. This can generate pleasant feelings. By stimulating the serotonergic system, alcohol creates a feeling of attachment to other people.
Alcohol slows down the brain centre known as the medulla oblongata, which controls breathing. If you suffer alcohol poisoning, your breathing can stop completely. That can be fatal.
The unsteady balance that you may experience after drinking alcohol is caused by disturbances in the functioning of the cerebellum.