The Depression Center  
 
 

Depression Glossary

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Illusion: the misinterpretation of sensory data leading to a false perception.

Inner Ear Infection: an infection of the inner ear that can cause balance problems or a sense of light-headedness. This condition can be medically diagnosed by an Ear, Nose, and Throat (ENT) specialist.

Insight: term used to describe the degree to which someone appears to understand their own problems, motivation and inner life.

Insomnia: problem with falling asleep or waking up resulting in lack of sleep and fatigue.

Intelligence: the ability to learn, think (reason), and adapt to changing environmental conditions.

International Classification of Diseases (ICD-10): current system of classification of disorders/problems published by the World Health Organization.

Interoceptive Fear: fear of internal bodily sensations or perceptions of bodily functions.

Introspection: the process of observing and reporting on one’s thoughts, feelings and inner experience.

Introversion: the tendency to direct one’s attention and effort to the inner world of experience and concepts rather than people and external events.

In Vivo: taking place in real life as opposed to the imagination or the laboratory.

Irritable Bowel Syndrome (IBS): chronic pain or discomfort associated with the lower intestines.

IBS: irritable bowel syndrome

ICD-10: current version of the International Classification of Diseases.

Implosion: a psychotherapy technique in which people are asked to imagine and relive traumatic events.

Indoleamines: a family of monoamine hormones and neurotransmitters including serotonin and melatonin that are involved in many functions including sleep, biological rhythms, and vasoconstriction.

Instinct: an inborn pattern of responding to certain situations or events that require no learning.

Interpersonal Accommodation: a reciprocal process by which individuals accommodate to each others' behavior.

Interpersonal Psychotherapy: an approach to psychotherapy based on the idea that much of psychiatric/psychological problems are the result of maladaptive behavior that we have learned in our previous interpersonal relationships. The focus of psychotherapy is on relationships.

Irritable Heart: an old term for panic disorder.