G20-G26: Extrapyramidal and movement disorders
G23: Other degenerative diseases of basal ganglia
The group of illnesses categorized as Other Degenerative Diseases of the Basal Ganglia refers to a variety of disorders that involve the degeneration, or breaking down, of nerve cells in the basal ganglia. The basal ganglia are an essential part of the brain that helps control movement, changes in movement, and other functions like emotions and cognition. These diseases can cause various symptoms such as trouble moving, tremors, rigid muscles, and balance problems due to deterioration in this area of the brain. Causes can often be attributed to genetic mutations, but some are a result of other factors, including environmental toxins or aging. As the illnesses progress, problems with physical movement and other functions generally worsen.
G23.0: Hallervorden-Spatz disease
G23.1: Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski]
G23.2: Multiple system atrophy, parkinsonian type [MSA-P]
G23.3: Multiple system atrophy, cerebellar type [MSA-C]
G23.8: Other specified degenerative diseases of basal ganglia
G23.9: Degenerative disease of basal ganglia, unspecified
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