Motor Neuron Disease (MND) is a serious and incurable neurologic disease which is characterized by progressive degeneration of motor neurons. It may occur after the injury of upper and lower motor neurons.
Motor neuron disease http://en.wikipedia.org/wiki/Motor_neuron_disease The motor neuron diseases (MND) are a group of neurological disorders that selectively affect motor neurons, the cells that control voluntary muscle activity including speaking, walking, swallowing, and general movement of the body. They are generally progressive in nature, and cause increasingly debilitating disability and, eventually, death.
Motor Neuron Disease is not just any one disorder. It is basically a group of various neuron disorders which usually affect the motor neurons. These cells are responsible for aiding voluntary movements in the body which are majorly hindered due to the presence of this disorder.