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What is Saccadic movement present in all except: and explain in detail?
Saccades Rapid, ballistic movement of eyes that abruptly change the point of fixation. Can be elicited voluntarily, but occur reflexly whenever the eyes are open, even when fixated on a target. Rapid eye movement that occur during sleep are also saccades. Site -Basal ganglia or cerebellum. Option B- Huntington's chorea - damage to caudate nucleus Option C- Progressive supranuclear palsy - damage to Basal ganglia Option D- Spinocerebellar ataxia- damage to cerebellum falls backwards But in Alzheimer's - coical dementia