Development of a prototype to sleep studies and other neurologic diseases, through actigraphy

  • Jose Intelesano
  • Mariano Cigliano
  • Hugo Mario Díaz Fajreldines
  • Diego A. Beltramone


Actigraphy is a frequently used technology for diagnostic and prospective monitoring of treatment of patients in many clinical conditions. It is an appropriate method and has a positive cost- benefit relation for acquiring and quantifying patient movements during long time periods. In the local market, there are several commercial products for analyzing sport performance. However, they don’t have necessary continuing monitoring conditions yet. For this reason, a prototype which properties were compared with a commercial device (Vivofit) was developed and manufactured. Tests were made during 4 to 10 days in 3 members of the research and development team for the actigraphy prototype (named Actios). The construction of the Actios was based in the development of a board with an ARM Cortex MO+ microcontroller. This microcontroller has a firmware in order to configure an accelerometer which acquire signals induced by patients’ movements, acquiring one simple per second. Then, the average of samples is stored in a non-volatile memory. The hardware has an USB port for device configuration from a Personal Computer and transferring the stored data in memory up to 10 days of register depending on the sampling frequency. As a conclusion of this article, it is important to emphasize the development of the Actios, which evidences a higher sensibility of fine movement detection comparing with the commercial device. On the other hand, there are similarities between the two equipment during sleep register on the same individual subject. Finally, some specific data on Actios performance in distinct limbs in the same subject is provided.
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