The "brain chemistry" theory of depression suggests that depression is caused by

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The "brain chemistry" theory of depression primarily posits that depression is linked to an underactivity or imbalance of key neurotransmitters in the brain, such as norepinephrine, serotonin, and dopamine. These neurotransmitters are crucial for regulating mood, and their reduced activity is thought to contribute to the symptoms of depression.

The "Brain Chemistry" Theory of Depression Suggests That Depression Is