Looking at the past can interfere with the present. Source: Anderson Martins/Pexels What is rumination? Rumination has been defined as "the tendency to focus passively and repetitively on one's ...

Overthinking is not weakness but a nervous system response to stress and uncertainty. This feature explores the science of ...

Obsessive-compulsive disorder (OCD), a disorder that involves rumination, can lead to paranoid thoughts and paranoia. OCD occurs when a person experiences a cycle of obsessive thoughts and urges ...

Instructor in Physiology and Assistant Clinician to the Clinic of Nervous Diseases of the St. Louis Medical College, Medical Department of Washington University, St. Louis, Mo. Select the format you ...