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(PAH-lee-SOM-noh-gram)
![](https://webarchive.library.unt.edu/eot2008/20081026195335im_/http://www.nci.nih.gov/images/spacer.gif)
| A group of recordings taken during sleep that shows brain wave changes, eye movements, breathing rate, blood pressure, heart rate, and the electrical activity of the heart and other muscles. A polysomnogram may be used to help diagnose sleep disorders. |
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