Study of ITI-007 in Healthy Geriatric Volunteers and in Geriatric Patients With Dementia

Inclusion Criteria: Part 1 * Healthy geriatric volunteers * MMSE score of \>= 26 at screening * BMI between 19.0 and 40.0 kg/m2 and a minimum body weight of 50 kg at screening Part 2 * Geriatric patients with a clinical diagnosis of dementia * MMSE score of \< 26 at screening * BMI between 19.0 and 40.0 kg/m2 and a minimum body weight of 50 kg at screening Exclusion Criteria: * Any clinically significant illness within 6 months before screening * Any history of cancer within last 5 years * History of Hepatitis B or C infection and elevated ALT, AST or bilirubin above the upper limit of normal level * Any subject considered to be an imminent danger to themselves or others