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Semi-quantitative analysis of mNocexpression in different brain regions at three times of day. (++ = Strong hybridization; + = Weak hybridization; - = no hybridization).
| Brain Region | ZT4 | ZT12 | ZT20 |
| Olfactory Bulb | |||
| Internal Granule Layer | ++ | ++ | ++ |
| Lateral olfactory tract | - | - | - |
| Piriform cortex | ++ | + | - |
| Hippocampus | ++ | ++ | + |
| Hypothalamus | |||
| Suprachiasmatic nucleus | + | + | - |
| Arcuate nucleus | + | + | - |
| Ventromedial hypothalamic | |||
| Nucleus | + | + | - |
| Subiculum | + | + | + |
| Cerebellum | ++ | ++ | + |
| Pineal Gland | - | - | + |
