In this study, the investigators will determine the difference between the two techniques used to elicit the grasp response in patients with frontal lobe dysfunction, primarily in dementia patients versus control patients.

The goal of this project is to determine the optimal technique to elicit the grasping response in patients with dementia or suspected frontal lobe dysfunction. The proposed study is to perform two techniques to elicit grasp response in patients with dementia or suspected frontal lobe dysfunction and observe the presence or absence of the response and prominence of the response on a proposed rating scale. Future goals will be aimed at aiding clinicians in refining their clinical techniques to be more sensitive for diagnosing frontal lobe dysfunctions.

Inclusion Criteria:

1. Ability to sign informed consent or have a surrogate present to sign the consent
2. Age 18 or above
3. Patients are diagnosed with dementia, Alzheimer's disease, or frontal lobe dysfunction
4. Medications are to remain stable during the course of the study except for emergency modifications.

Exclusion Criteria:

1. Inability to obtain informed consent from patient or surrogate
2. Unable to follow commands.
3. Physical restrictions (i.e. spasticity of hands/arms, upper extremity amputation)
4. Other comorbidities such as muscular diseases, hepatic encephalopathy, renal failure, down syndrome, NPH, depression, and cerebral palsy.