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A new actigraph forlong-termregistration of theduration andintensity of tremorand movement Eus J.W. Van SomerenB.F.M. VonkW.A. Thijssen1998 год

A new actigraph for long-term registration of the duration and intensity of tremor and movement
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Аннотация: Actigraphy, the long-term measurement of human movement with a small solid state recorder, is gaining acceptance as a useful method in many research fields. Currently available actigraphs assess or estimate the movement duration per time interval. However, the output gives no information on movement type or intensity, and cannot be used in subjects suffering from tremor. The present paper describes a new type of actigraph, that has been developed primarily for the long-term evaluation of motor symptoms in Parkinson patients. The device is the first to discriminate tremor from other movements and to assess both duration and intensity of the two types of movement. It is based on a Motorola 68HC805B6 microcontroller and contains: an accelerometer, programmable gain stages, programmable low- and highpass filters, a programmable level comparator, a peak detector, interface circuits, a real time clock, data storage, and control circuitry. The micro-controller performs a period amplitude sequence analysis (PASA) on the conditioned accelerometer signal, and stores four output variables (tremor duration, tremor amplitude, movement duration, and movement amplitude) at the end of programmable time intervals. The analysis of fluctuations in the motor symptoms of, e.g., Parkinson patients using this actigraph can be of great help in the pharmacological management of symptoms.
Год издания: 1998
Авторы: Eus J.W. Van Someren, B.F.M. Vonk, W.A. Thijssen, Johannes D. Speelman, P.R. Schuurman, Majid Mirmiran, Dick F. Swaab
Издательство: Institute of Electrical and Electronics Engineers
Источник: IEEE Transactions on Biomedical Engineering
Ключевые слова: EEG and Brain-Computer Interfaces, Neurological disorders and treatments, Neuroscience and Neural Engineering
Другие ссылки: IEEE Transactions on Biomedical Engineering (HTML)
KNAW Research Portal (The Royal Netherlands Academy of Arts and Sciences) (PDF)
KNAW Research Portal (The Royal Netherlands Academy of Arts and Sciences) (HTML)
KNAW Research Portal (The Royal Netherlands Academy of Arts and Sciences) (HTML)
PubMed (HTML)