In the article “A Circadian Clock in the Olfactory Bulb Controls Olfactory Responsivity” by Daniel Granados-Fuentes, Alan Tseng, and Erik D. Herzog, which appeared on pages 12219–12225 of the November 22, 2006 issue, the absolute values for the phase angle of entrainment in Table 1 were incorrect. The correct values are in the table printed here.
Table 1.
OBX modifies motor activity rhythms
| Phase angle of entrainment (h) (lights on) |
Rate of re-entrainment (d) |
Free-running period (h) | ||||
|---|---|---|---|---|---|---|
| 7:00 A.M. | 1:00 P.M. | 7:00 A.M. | 6 h delay | 6 h advance | ||
| OBX (n = 24) | 12.01 ± 0.08 | 14.07 ± 0.02 | 11.9 ± 0.05 | 0.6 ± 0.2 | 4.3 ± 0.6 | 23.9 ± 0.04 |
| Sham (n = 10) | 11.95 ± 0.03 | 14.08 ± 0.04 | 12.09 ± 0.09 | 1.7 ± 0.3 | 2.4 ± 0.3 | 23.2 ± 0.02 |
| Student's t test | p = 0.6 | p = 0.9 | p = 0.09 | p = 0.004 | p = 0.04 | p = 0.0005 |
OBX and sham animals did not differ in their phase angles of entrainment but differed in the number of days needed to re-entrain to advances or delays in the LD cycle and their free-running periods. The delay from the daily onset of running-wheel activity to the onset of light (phase angle of entrainment), the number of days required to synchronize locomotor activity after a shift in the light schedule (rate of re-entrainment), and the free-running period under DD are expressed as mean ± SEM.