An Apparatus for the Measurement of a Neonateʼs General Activity

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Abstract
A simple, inexpensive device for sensing a neonate's gross activity is described. Ordinary VU meters, inserted in a foam rubber crib mattress, transduce neonatal movement to an output voltage capable of being recorded. No external power source is needed. Ratings of visually observed movement were correlated with ratings of recorded signals obtained from 4 neonates. A correlation coefficient of +.77 was found between these ratings. The use of this device suffers little from the problems of (1) balancing a stabilimeter platform, and (2) dampening oscillations after movement.

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