depression

 

The condition known as depression is not explained by a single cause.

For many years,

the “chemical imbalance” theory

suggested that

low levels of certain neurotransmitters were the primary reason for depression.

However, modern research shows

the picture is more complex.

Brain imaging and clinical studies

indicate that depression involves changes

in multiple brain networks related

to mood regula

tion, stress response, memory, and cognition. These include interactions between

neural circuits, hormones, inflammation, and environmental factors.

The neurotransmitters still play a role

in how brain cells communicate,

but depression cannot be fully explained

by simple imbalance of these chemicals alone.

Current science views depression as a multifactorial condition influenced by biological, psychological, and social factors working together.

Sources:

The Lancet Psychiatry, American Psychological Association