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Depression Glossary

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Narcotic Drugs: substances such as morphine that lead to increasing tolerance and physiological dependence.

Negative Automatic Thoughts: negative thoughts about the self and the future that occur automatically and often just below the surface of conscious awareness.

Negative Cognitive Triad: negative thoughts about the self, the world and the future.

Neurology: the field of medicine primarily concerned with the study of disorders of the brain and nervous system.

Neuron: an individual nerve cell.

Nicotine: the addictive alkaloid that is the main active ingredient in tobacco. May have an antidepressant as well as addictive effects.

NIH: National Institute of Health (United States).

NIMH: National Institute of Mental Health (United States).

Nocturnal Bruxism: term used to describe the clenching and/or grinding of teeth during sleep.

NREM: sleep that is not characterized by rapid eye movements (REM).

Nervous: used to describe the experience or feeling of anxiety, also used to describe the "nervous system" of the human body as studied in neurology.

Nervous Disease: an old name for any anxiety or panic disorder.

Nervous Exhaustion: an old name for any anxiety or panic disorder.

Nervous Heart: an old name for any anxiety or panic disorder.

Neurosis: an old term used to describe any anxiety, depressive, or obsessive compulsive disorder.

Neurotic Behavior: behavior that is driven by anxiety and involves extreme avoidance.

Neuroticism: a style of behavior characterized by anxiety, anger, hostility, depression, self-consciousness, impulsiveness, and vulnerability.

Neurotransmitter: a chemical substance that transmits information from one neuron to another neuron at a very short distance. Neurotransmitters are released by nerve cells into the extra cellular space at synapses. The release of neurotransmitter then produces either excitation or inhibition of an immediately neighbouring nerve cell. Many substances act both as hormone in the blood and neurotransmitters in either the central or peripheral nervous systems. Neurotransmitters in the brain can be generally divided into two large classes. Classical neurotransmitters, such as norepinephrine, are synthesized in nerve terminals close to the synapse, whereas the neuropeptide neurotransmitters, such as the endorphins, are synthesized in body of the nerve cell.

Noradrenaline: see norepinephrine

Norepinephrine (noradrenaline): a hormone and neurotransmitter (catecholamine) that is produced by the adrenal gland and is involved in a variety of functions including (sympathetic) arousal.

Normal Distribution: the tendency of most people to cluster around central point or average when measured on any given trait or behavior, with the remaining people more spread out towards the two extremes.

Negative Core Beliefs: you hold deep inside, deep-rooted conviction, inner messages that you repeat to yourself over and over, until you start to believe them, despite whether they are true or not.

Negative Life Events: Negative cognitive style, meaning the way you think and what your thoughts are, having little social support, as well as feelings of hopelessness and sadness, may contribute to the generation of negative life events

Negative Thinking: negative thinking includes having negative thoughts and beliefs, and having a general pessimistic outlook about ourselves and our future. This line of thinking can distort your view of the world until everything seems dreary and hopeless.