Glossary

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N

Nerves

Bundles of conducting fibres.

Neural

Related to the nervous system.

Neuron Neurons

Nerve cells with conducting fibres.

Neurotransmitter Neurotransmitters

A chemical substance in the brain that carries signals from one neuron to the next.

Nocturnal

Occurring at night.

Nonspecific

Not distinguishing.

Noradrenaline Norepinephrine

A substance secreted into the bloodstream that causes the heart to beat faster.

NSAIDS

Non-steroidal anti-inflammatory drugs. Used to reduce the severity and duration of migraines.

Nuclei

Localized groups of neurons in the brain.

Nucleus

A large, membrane-bound, usually spherical protoplasmic structure within a living cell, containing the cell's hereditary material and controlling its metabolism, growth, and reproduction.