Periodic Leg (or Limb) Movement (PLM) is an emerging field of study for researchers interested in studying involuntary activity in people. Examples of PLM include Restless Leg Syndrome. By using ActiGraph's ActiSleep+/wActiSleep+ device, users can use two devices affixed to a subjects feet during periods of rest to capture this activity data and analyze it. Because of the nature of PLM (very rapid movements in a very short period of time; sometimes only lasting 2 or 3 seconds), a one second Epoch is required for each limb (larger Epoch Lengths will very likely miss these movements). For more information on how to use the PLM Tool and what the results mean, please refer to the PLM FAQ Articles located here.
Before you can use the PLM tool, you must first enter sleep periods. You can do this either using the Sleep Analysis Tool or by manually entering them using the buttons shown on the left side of the PLM Tool.
Once you have your files loaded, you will be able to analyze it using a number of criteria and also using Axis 1, 2, 3, or all three (with Vector Magnitude or VM). As you can see, the various editable criteria are along the left, a graphical representation of each dataset is in the middle and specific information on the analysis is located on the right.
You can also export these results as an HTML document or Print it directly using the Export Report button.
Next, we will cover the Graphing Tool. Click here to continue.