G20.A

Clinical Causes: Degeneration of dopamine-producing neurons in the substantia nigra region of the brain Genetic factors, such as mutations in specific genes like SNCA, PARK2, and LRRK2 Environmental exposures, including pesticides and toxins Age-related changes, with the risk increasing as people grow older Possible prior head trauma or other neurological conditions

Key Symptoms: Bradykinesia (slowness of movement) Muscle rigidity or stiffness Postural instability or impaired balance Masked facial expressions (reduced facial movements) Shuffling gait and difficulty initiating movements Voice changes, including softer or muffled speech Decreased arm swing while walking Micrographia — small, cramped handwriting

Diagnosis Path: Diagnosis is primarily clinical, based on a detailed medical history and neurological examination. Healthcare professionals assess motor symptoms, response to dopaminergic medications, and rule out other conditions. Imaging tests like DaTscan may support diagnosis by visualizing dopamine transporter levels, but there are no definitive lab tests for Parkinson's disease. Early diagnosis relies on identifying characteristic signs, especially in the absence of dyskinesia, which is common in some Parkinson's subtypes.

Treatment Protocols: While there is no cure for Parkinson's disease, various treatment options can help manage symptoms. Strategies include medications such as levodopa combined with carbidopa to replenish dopamine levels, and dopamine agonists to stimulate receptors. Physical therapy and regular exercise are vital in maintaining mobility and flexibility. Speech therapy can assist with speech difficulties, while occupational therapy helps adapt daily activities. In some cases, surgical options like deep brain stimulation may be considered for symptom control.