Table 1. Npas4⁺ Immunoreactivity in Layer II of Anterior Piriform Cortex.

Groups*	2σ above Mean Background Immunoreactivity†
	Median	95% Confidence Interval
		Lower	Upper
Control	3.0	1.6	5.2
Awake	94.5	92.3	98.5
Propofol	97.4	95.7	98.0
Awake-Awake	43.6	21.3	53.5
Propofol-Awake	39.6	8.7	65.0

^*Groups are defined as in Fig. 2.

^†σ: Standard deviation of the background Npas4 fluorescence intensity in the Control group.