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Correspondence of Yin/Yang with the autonomic nervous system
| Sympathetic nerve ↑ | Parasympathetic nerve ↑ | |
|---|---|---|
| Classification as Yin or Yang | Yang | Yin |
 |
↑ | ↓ |
| ↓ | ↑ | |
 |
Increased cell numbers | Hyperactivity |
| Hyperactivity | Increased cell numbers | |
| Time | Day | Night |
| Treatment | Yang tonic(Qi tonic) | Yin tonic(Blood tonic) |
