neuropots is the body not functioning blood flow properly causing bp drops and faints. hyperpots is the body having too much of natural stimulants in the body and anything setting them up to higher levels, causes raises that cause faints or seizures.
Basically, pots is where there's low blood volume and it tends to pool when someone's been sitting. So, when they stand up, there's a blood pressure drop and the heart rate spikes to try and compensate.