Subcoical dementia is seen in all except: (A) Parkinsonism, (B) Alzheimer's disease, (C) Wilson's disease, (D) Huntingtons chorea
Answer is B. Coical dementia, ex: Alzheimer's disease, Pick's disease. Site of lesion is Coex(frontal & temporoparieto-occipital association areas, & hippocampus). Subcoical dementia, ex: Huntington's chorea, Parkinson's disease, progressive supranuclear palsy, Wilson's disease. Site of lesion is subcoical grey matter(thalamus, basal ganglia, & rostral brain stem). Reference: A sho textbook of Psychiatry by Niraj Ahuja, 7th edition, page 24.