Sensory-Evoked Cortical Gamma Oscillation

Inclusion Criteria: * Individuals ages 60 and older with established diagnosis of Alzheimer's Disease as defined by the current consensus criteria for AD (Albert et al, 2011, Jack et al, 2011; McKhann et al, 2011) * Fluent and literate in English language * Able to consent for themselves based upon the MacArthur Competence Assessment Tool for Clinical Research * Patients with a pre-existing positive A(beta)-PET and/or CSF tau/A(beta) markers or willingness to undergo a Lumbar Puncture (LP) with these results Exclusion Criteria: * Not fluent and literate in English * Severe dementia * Other medical conditions/neurodegenerative disease that could significantly impair cognitive abilities * Cardiac pacemakers or any other implants that may not be compatible with MRI * Cognitively impaired to the point the patient is unable to consent for themselves * Claustrophobic to the point that medication is required