Medical Webbook

Motor neuron disease

Motor neuron disease

A group of rare disorders in which the nerves that control muscular activity degenerate within the brain and spinal cord. The result is weakness and atrophy (wasting) of the muscles. The cause is unknown....

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Motor

Motor

A term used to describe anything that brings about movement, such as a muscle or nerve. The word is usually applied to nerves (including those in the part of the brain called the cerebral...

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motion sickness

Motion sickness

A condition produced in some people by road, sea, or air tra vel. In its mildest form, motion sickness may be only a feeling of uneasiness and a headache; in severe cases, there may...

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Mosquito bites

Mosquito bites

Mosquitoes are flying insects found throughout the world. The females require blood from humans or animals to produce eggs; they obtain this blood through their bites. The mosquito eggs are laid and hatched in...

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