In classifying and diagnosing mood disorders, doctors determine if the mood disorder is unipolar or bipolar.
We may regard it as a form of unipolar immigration in which the immigrating cells pass into the interior in a connected epithelial layer, instead of going in singly and independently.
When only one extreme in mood (the depressed state) is experienced, this condition is called unipolar.
Electroconvulsive therapy (ECT) has a high success rate for treating both unipolar and bipolar depression and mania.
Women are more vulnerable to unipolar depression than are men.