Table 2.

Bulbectomy (OBX) had no significant effect on entrainment or activity in rats. 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 following a shift in the light schedule (rate of reentrainment) and the number of wheel revolutions during the daily bouts of activity (Nighttime) and inactivity (Daytime) are expressed as mean ± SEM.

	Phase angle of entrainment (h)			Rate of reentrainment (days)		Activity (average counts/day)
	Lights on at			6 h delay	6 h advance	Daytime	Nighttime
	7am	1pm	7am
OBX (n=10)	11.6±0.5	11.5±0.5	11.5±0.2	11.6±0.4	14.0±0.4	14.6±4.8	3300±1138.4
Sham (n=6)	11.7±0.4	11.5±0.2	11.3±0.2	12.7±0.3	14.7±0.3	5.2±1.8	1411±174.5
Student t-test	p=0.9	p=0.5	p=0.6	p=0.08	p=0.3	p=0.2	p=0.2