Patent ID: 11883183
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 6:
7. A cognitive function evaluation device, comprising:
a storing unit configured to store reference data on a relationship between periodicity of a body movement of a person walking and a cognitive function level of the person;
an acquiring unit configured to acquire body movement data on a detected body movement from a body movement sensor configured to detect the body movement of a subject walking; and
a calculating unit configured to calculate, in real time while the subject is walking, the periodicity of the body movement from the body movement data acquired by the acquiring unit and check the calculated periodicity of the body movement against the reference data stored in the storing unit so as to identify the cognitive function level corresponding to the calculated periodicity of the body movement, wherein
the periodicity of the body movement is a time taken for the subject to take one step when walking,
the body movement data is data on a change in the acceleration of the body movement over time,
the calculating unit is further configured to generate relative position data on a movement of a center of gravity position of the subject from the body movement data and, after a predetermined time has passed after the subject starts walking, identify a time period, during which the subject makes a predetermined number of steps while walking, based on the generated relative position data and calculate the time of a step from the body movement data in the identified time period, the identified time period being a time period after a predetermined time has passed after the subject starts walking,
based on the time of the step calculated, the calculating unit is further configured to identify a cognitive function level of the person, the cognitive function level being indicative of a cognitive impairment in the subject, and
the calculating unit is configured to predetermine the predetermined time.