Cheryl’s doctor is sending her home with a wristwatch-sized device to record her arm movements during sleep to determine the length and quality of her sleep.What assessment tool is he

Cheryl’s doctor is sending her home with a wristwatch-sized device to record her arm movements during sleep to determine the length and quality of her sleep.What assessment tool is he using?
A)a polysomnograph
B)an electromyograph
C)an electroencephalograph
D)an actigraph


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