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Table 1 Cosinor-based rhythm parameters for the 24-monitored motor activity of Pin and Sham groups, sorted by Age (3 m, 14 m, 18 m); n = 8

From: The role of melatonin deficiency induced by pinealectomy on motor activity and anxiety responses in young adult, middle-aged and old rats

 

Mesor

Amplitude

Acrophase (hours,decimal)

Sham 3 m

1684.85 ± 301.40

461.48 ± 85.94

15.39 ± 1.03

Pin 3 m

1207.90 ± 232.21

640.72 ± 109.75

14.95 ± 0.63

Sham 14 m

1792.69 ± 47.87

839.50 ± 88.54

16.15 ± 0.51**

Pin 14 m

1666.84 ± 74.21

743.56 ± 78.00

16.46 ± 0.56

Sham 18 m

1345.01 ± 32.50

681.60 ± 80.13

14.24 ± 1.34

Pin 18 m

1311.87 ± 142.22

411.83 ± 55.11

15.93 ± 1.19

  1. Two-way ANOVA indicated a main Age effect for Amplitude [F2,46 = 8.624, p < 0.001] as well as Age x Surgery effect [F4,46 = 2.562, p < 0.05]; p = 0.004 14 month-old sham vs the matched 3-month-old rats