The brain is the most complex organ in the human body, responsible for everything we do, think and feel. The average human brain weighs about three pounds and consumes about 20% of the body’s energy, despite being only 2% of the total body weight.

Here are 7 other fascinating facts about the brain:.

1. The brain can generate electrical signals

The brain’s cells, called neurons, communicate with each other through electrical and chemical signals. These signals help to create our thoughts, emotions, and movements.

The electrical signals can be measured with an electroencephalogram (EEG) and are used to diagnose conditions such as epilepsy and sleep disorders.

2. The brain is not fully developed at birth

While the brain is fully formed in terms of structure at birth, it is not fully developed. Neurons continue to form connections and pathways throughout childhood and adolescence. This allows us to learn new things and adapt to our environment.

3. Alcohol affects the brain’s ability to communicate

Alcohol affects the brain’s ability to communicate by blocking the receptors for a signaling molecule called glutamate. This leads to impaired neuronal function and can cause slurred speech, impaired coordination, and memory loss.

Long-term alcohol use can lead to brain damage and dementia.

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4. The brain is capable of rewiring itself

The brain has the ability to reorganize itself in response to new experiences and learning. This is called neuroplasticity and is essential for our ability to adapt to changes in our environment.

Neuroplasticity can also be used to help with rehabilitation after stroke or injury.

5. The brain’s amygdala is responsible for fear

The amygdala is the part of the brain responsible for the processing of emotions, including fear. When we perceive a threat, the amygdala sends signals to other parts of the brain to initiate the fight or flight response.

6. Lack of sleep can damage the brain

Sleep is essential for brain function and lack of sleep can lead to a range of problems, including impaired memory and concentration, mood disorders, and even physical changes in the brain.

Chronic sleep deprivation has been linked to the development of Alzheimer’s disease and other neurological disorders.

7. The brain can create new neurons

Contrary to previous beliefs, the brain is capable of creating new neurons through a process called neurogenesis. This occurs primarily in the hippocampus, a part of the brain involved in memory and learning.

Exercise, sleep, and a healthy diet can all help to promote neurogenesis.