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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.
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.
Neurology
The field of medicine primarily concerned with the study of disorders of the brain and nervous system.
Neuron
An individual nerve cell.
Neurosis
An old term used to describe any anxiety, depressive, or obsessive compulsive disorder.
Neurotic Behavior
Behavior that is driven and 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 extracellular space at synapses. The release of neurotransmitter then produces either excitation or inhibition of an immediately neighboring nerve cell. Many substances act bothas hormones 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.
Nicotine
The addictive alkaloid that is the main active ingredient in tobacco. May have an antidepressant as well as an 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.
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.
NREM
Sleep that is not characterized by rapid eye movements (REM).
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