Parkinson's disease is a neurological disorder that affects movement. It is caused by the degeneration of dopamine-producing neurons in the brain. Dopamine is a neurotransmitter that plays a key role in movement control, so the loss of these neurons leads to symptoms like tremors, stiffness, and difficulty with balance and coordination.


Other movement disorders include:


1. Essential tremor: This is a common movement disorder that causes tremors, usually in the hands and arms, but sometimes in the head or voice. It is often mistaken for Parkinson's disease, but it is a separate condition.


2. Huntington's disease: This is an inherited disorder that causes the progressive degeneration of nerve cells in the brain. It leads to uncontrolled movements, cognitive decline, and behavioral changes.


3. Dystonia: This is a movement disorder that causes involuntary muscle contractions, leading to twisting and repetitive movements or abnormal postures.


4. Tourette's syndrome: This is a neurological disorder that causes repetitive, involuntary movements and vocalizations called tics.


5. Multiple system atrophy: This is a rare neurological disorder that affects movement, balance, and autonomic functions like blood pressure and bladder control.


Treatment options for movement disorders depend on the specific condition and the severity of symptoms. They may include medications, physical therapy, and in some cases, surgery.