Parkinson's
Parkinson’s is a progressive neurological condition that affects the brain and gradually worsens over time. It occurs when nerve cells that produce dopamine stop working. Dopamine helps control movement, so when levels drop, everyday tasks, such as walking, writing, or buttoning up a shirt, can become slower and more difficult. Around 166,000 people in the UK live with Parkinson’s, and someone is diagnosed every 20 minutes. Globally, cases are expected to double to 25 million by 2050. There are more than 40 possible symptoms, and they vary from person to person. The risk increases with age, and most people diagnosed are over 50, though younger people can also develop it.
Symptoms and Diagnosis
Symptoms develop gradually and vary for each person. Common symptoms include slowness of movement (bradykinesia), tremor, stiffness, fatigue, and smaller handwriting. Early signs can appear before movement problems and may include a reduced sense of smell, depression, anxiety, sleep difficulties, constipation, and persistent tiredness. Parkinson’s is challenging to diagnose because there is no single definitive test, and several other conditions can present with similar features.
Parkinsonism
Parkinsonism refers to a group of conditions that share symptoms such as slowness of movement, stiffness, and tremor. Parkinson’s disease is the most common, but there are related conditions with overlapping features.
Tremors
A tremor is an involuntary movement that often affects the hands. Essential tremor is most noticeable during activity, often improves at rest, and usually affects both sides equally. A Parkinson’s tremor is most obvious when resting and tends to lessen during movement. It typically starts on one side of the body and may progress to the other as the condition develops.
Idiopathic Parkinson’s
The most common form, with an unknown cause. Symptoms vary from person to person but often include slowness of movement, tremor, stiffness, fatigue, and smaller handwriting, with early non-motor signs such as reduced sense of smell, mood changes, sleep problems, constipation, and tiredness.
Vascular Parkinsonism
Caused by reduced blood flow to the brain, often after a mild stroke. It mainly affects mobility, leading to unsteady walking, short shuffling steps, and balance problems. Other features can include bladder issues, communication difficulties, and memory problems.
Drug-Induced Parkinsonism
Triggered by certain medications, particularly neuroleptic drugs that block dopamine. Symptoms such as slowness of movement, tremor, stiffness, and walking difficulties usually appear quickly and tend to remain stable. Many people improve after the medication is stopped.
The core driver of Parkinson’s symptoms is the loss of dopamine-producing nerve cells in the brain. While the exact cause remains unknown, evidence points to a combination of age, genetic susceptibility, and environmental factors. This loss of dopamine explains the movement changes seen in Parkinson’s and helps distinguish it from related conditions within the broader parkinsonism spectrum.
