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What is Parkinsonism differ from atypical parkinsonism by the absence of and explain in detail?
Atypical Parkinsonisms Characterised by Progressive supranuclear palsy Coicobasal ganglionic degeneration Frontotemporal dementia Multiple-system atrophy a)Cerebellar type (MSA-c) b)Parkinson type (MSA-p) Poor response to dopamine early loss of balance prominent intellectual changes rapid onset of progression conspicuous postural hypotension urinary & bowel incontinence Little or no tremor Reference: Chapter 372. Parkinson's Disease and Other Movement Disorders Harrison's Principles of Internal Medicine 18th edition