Complex sentence: If a person were to stay up all night and not receive the depressurization effect of process-S by sleep, the distance between the two graphs the following day would be so great at 11 p.m. that an extremely strong push for sleep would be experienced.
Split into simpler sentences: If a person stay up all night and did not receive the depressurization effect of process-S by sleep. The distance between the two graphs the following day would be so great at 11 p.m. that a extremely strong push for sleep would be experienced.