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    what is motor neuron disease

    +1  Views: 194 Answers: 2 Posted: 14 years ago

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    This is auwful diseases my friend had it many years ago she was one of the first people to go to digneytast in Switzaland  her Husband thought he might be arressted when he got back  but he didnt she chose this it was really bad for the Family but you have to respect her wishes anyway 6dogs has done a brilliant job in explaining it for you

    Here you go:

    6dogs4us

    The motor neuron diseases (MNDs) are a group of progressive neurological disorders that destroy motor neurons, the cells that control essential voluntary muscle activity such as speaking, walking, breathing, and swallowing. Normally, messages from nerve cells in the brain (called upper motor neurons) are transmitted to nerve cells in the brain stem and spinal cord (called lower motor neurons) and from them to particular muscles. Upper motor neurons direct the lower motor neurons to produce movements such as walking or chewing. Lower motor neurons control movement in the arms, legs, chest, face, throat, and tongue.

    When there are disruptions in these signals, the muscles do not work properly; the result can be gradual weakening, wasting away, and uncontrollable twitching (called fasciculations). When upper motor neurons are affected, the manifestations include spasticity or stiffness of limb muscles and over-activity of tendon reflexes such as knee and ankle jerks. Eventually, the ability to control voluntary movement can be lost. MNDs may be inherited or acquired.


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