Transcranial Pulse Stimulation of the Brain

Inclusion Criteria: * Men and women * Age: 65 to 84 years * English speaking * Physically mobile with no history of balance difficulties or major falls * For the typically-aging older adult group, phone screening performance on the TICS must be greater than or equal to 33 points, and cognitive performance of 26 points or greater on the MoCA and a Sum of Boxes score of 0 on the Clinical Dementia Rating scale administered to the participant's informant at the initial visit * For the Mild dementia group, phone screening performance on the TICS must be between 21 and 32 points, and subsequent cognitive performance of on the MoCA must be \<23 with a CDR Sum of Boxes score between 4.5 and 9.0 as administered to the participants known informant at the initial visit. Exclusion Criteria: * Neurological disorders unrelated to dementia / AD (e.g., Parkinson's disease, stroke, seizures, traumatic brain injury) * Evidence of greater-than-mild dementia/AD (based on informant CDR Sum of Boxes score greater than 9.0 or MoCA \<10) * Past opportunistic brain infection * Major psychiatric illness (schizophrenia, intractable affective disorder, current substance dependence diagnosis or severe major depression and/or suicidality) or any history of agitation and/or delirium * Unstable (e.g., cancer other than basal cell skin) and chronic (e.g., diabetes mellitus) medical conditions * MRI contraindications (e.g., pregnancy, claustrophobia, metal implants that are contraindicated for MRI and TPS)…