Figure 9.
Circadian locomotor activity of p75NTR−/− mice. A, Representative activity records (actograms) of wild-type mice and p75NTR−/− mice are shown in double-plotted format. Each horizontal line represents 48 h. Vertical bars represents periods of voluntary wheel running activity. B, Periodogram estimates of period (h) for each genotype and power corresponding to circadian amplitude (power-significance from periodogram analyses). Each bar is mean × SEM (n = 14 per genotype). Statistical comparisons were made with Student's t test (ns, not significant).