A progressive disorder caused by degeneration of nerve cells in the part of the brain that controls movement is called:

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Parkinson's disease is a progressive disorder caused by degeneration of nerve cells in the substantia nigra, a region of the brain that controls movement. This degeneration leads to a shortage of dopamine, a neurotransmitter that helps control movement, resulting in symptoms such as tremors, stiffness, and difficulty with coordination and balance.

A Progressive Disorder Caused by Degeneration of Nerve Cells in the Part