Depression affects everyone in many unique ways, but according to a new study, our brains have a much more formulated view of what our depression really is.

According to a new study, there are four distinct biotypes (biotypes relating to biological means) of depression. These types were found by evaluating the brain scans of 1,100 individuals who reported having depression, compared with healthy individuals.

The four types of depression are as follows:

Biotype 1 is characterized by anxiety, insomnia, and fatigue.

Biotype 2 is characterized by exhaustion and low energy.

Biotype 3 is characterized by an inability to feel pleasure, as well as slowed movements and speech.

Biotype 4 is characterized mostly by anxiety with insomnia, along with the inability to feel pleasure.

Evaluating these subtypes may help us find the best treatment for individuals with different symptoms.