Falling is an event that is more frequent and severe in older age. It can lead to a loss of autonomy and a decrease in quality of life. It is therefore important to understand this phenomenon in order to better prevent it. Among the multiple risk factors associated with falling, recent research has shown a link between the decline in cognitive abilities (i.e., the mental processes that form our knowledge, such as memory) and the risk of falling. However, the impact of this cognitive decline on motor skills is still poorly understood. The purpose of this research is to study how the changes induced by aging affect motor skills. This would make it possible to take a new look at the phenomenon of falls occurring in the elderly and, in the long term, to improve the prevention and rehabilitation.
Person aged 18 to 40 years
Person who has given oral consent
Affiliated to national health insurance
Right-handed person
Neurological or psychiatric history with the exception of the TCL group.
Follow-up of drug treatment in the last three months that may affect cognitive and/or motor skills.
Received a shoulder prosthesis on the dominant side.
Received a hip and/or knee replacement less than a year ago.
young subjects, elderly neurotypical subjects and elderly subjects with mild cognitive disorder
Case-control
Prospective
Sequence 1
Other interventionperform arm movements towards a target
Sequence 2
Other interventionjudge the verticality of an object
Sequence 3
Other interventionIn standing position, point as quickly as possible with the right arm at the diode that will light up in front of the participant.
Sequence 1: symmetry ratio of the finger speed profile
Sequence 2 : perception bias (error in degrees of angle) of dynamic subjective visual vericality
Sequence 3 : activation time of the focal muscles in relation to the postural muscles
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