Figure 4.

The distribution of CSF [Na+] over a 24-h period for one representative participant, starting at 08.00 h. The data points in this case are connected by the line, and represent 144 samples measured in duplicate, as described in Methods. There appears to be rhythms in the spectrum, but they are hard to quantify.

Harrington et al. Cerebrospinal Fluid Research 2010 7:3   doi:10.1186/1743-8454-7-3
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