Category: N
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Nonessential fat
Any body fat that is more than what we need for normal physiological function.
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Natural environment
Everything nonhuman that surrounds and influences a person.
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Nicotine withdrawal
A reaction to the lack of nicotine in the body.
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Neighborhood crime watch
A group of volunteers who report suspicious activities in their neighborhood to the police.
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Neuropsychologist
A psychologist with specialized training in the evaluation of cognitive functions. Neuropsychologists use a battery of standardized tests to assess specific cognitive functions and identify areas of cognitive impairment. They also provide remediation for individuals with MS-related cognitive impairment. A clinical psychologist with expertise in evaluating psychological well-being affected by a brain disorder.
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Nerve cell
A type of cell that receives and sends messages from the body to the brain and back to the body. The messages are sent by a weak electrical current. Also called a neuron. Tiny bundles of fibers that exchange chemical and electrical messages with the brain.
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Notching
Version of point cutting in which the tips of the scissors are moved toward the hair ends rather than into them; creates a chunkier effect. A rib surface abnormality frequently linked to coarctation of the aorta is referred to as a deformity.
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No-stem curl
Curl placed directly on its base; produces a tight, firm, long-lasting curl and allows minimum mobility.
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Normalizing lotions
Conditioners with an acidic pH that restore the hair’s natural pH after a hydroxide relaxer and for shampooing.
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Nonstripping
Product that does not remove artificial color from the hair.