Abstract
The spontaneous motor activity of newborn infants was electronically monitored using a sensing unit, placed in the bed or incubator. The sensor is an inductive-capacitive circuit, which allows monitoring of motor activity without attachment of cables or electrodes to the infant. The signal from the instrument and the coded visual observation of the motor activity was simultaneously transferred to a tape recorder. In a few cases the motor activity of the infant was also filmed. The correlation between the visual observations and the electronic records of motor activity was analyzed. The signals from the sensing unit are synchrone to the observed moments. The instrument presents a semiquantitative display of the motor activity pettern, and is superior to a method based on ordinary visual observation, which is inaccurate in prolonged studies. Different patterns of motor activity in newborn infants will be described and the application of motor activity studies in pediatric research and clinical work will be discussed.
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