Sleep apnea, 8 Qi schemes, central sleep apnea

Continued of a previous post.
Starting with path to brain:
Burn--->Light (brain)--->Dryness (respiratory system)--->Darkness (night time): Ho (spasm, weakness) sedate, He tone up

and similarly, for most serious cases:
Burn--->Light (brain)--->Dryness--->Darkness (night time)--->Darkness (potentially lethal cease of breath): No tone up