The purpose of this study is to provide relevant quantitative evaluation of apathy close to real life situation by means of a multimodal sensor system integrated.

The investigators try to measure the amount of goal-directed behaviour and to detect the pattern of apathy. The main objective of this pilot phase is to select the variables of goal-directed behaviour from the list of metrics providing by the multimodal acquisition system in healthy subjects and patients with frontotemporal dementia.

Inclusion Criteria:

• Diagnosis of Frontotemporal Dementia (FTD) according to diagnostic criteria reported by Rascovsky et al. (2011).
• Understanding of the instructions and capacity to realize the cognitive tasks.
• Capacity to read, to understand and to sign legal document of information
• Capacity for informed consent for research, capacity to sign consent
• MMSE score > 20
• Absence of other cerebral pathology.
• Absence of psychiatric disease interfering with the assessment of the tests
• Absence of excessive psychotropic use
• Access to National Healthcare Insurance
• Accompanied with a caregiver

Exclusion Criteria:

• Excessive psychotropic use
• Incapacity or refusal to realize the experimental tasks
• Subject deprived of freedom by an administrative or court order
• Subject under legal protective measure.
• Incapacity for informed consent for research
• Participation in another biomedical research
• Airway obstruction risk
• Reduction of activity not attributable to another chronic pathological condition