pacemaker

n. a natural or artificial device that helps establish and maintain certain biological rhythms. Unqualified, the term usually refers to a cardiac pacemaker. Natural pacemakers include the sinoatrial node, which regulates heart rhythm, and the thalamic pacemaker.

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Psychology term of the day

January 3rd 2025

unipolar disorder

persistent or pervasive depression that does not involve a manic episode, a hypomanic episode, or a mixed episode. As such, it contrasts with bipolar disorder. The term is sometimes used synonymously with major depressive disorder. Also called unipolar depression.