Fig. 5.

Effect of sleep cycle on delay and clarity of transitions. (A) Clarity and (B) Delay between intracranial and scalp transitions with respect to the sleep cycle. Each dot represents a global transition. For later cycles, the clarity decreases and the intracranial transition occurs earlier, with the transition of the second cycle happening on average 1 min after the scalp transition and the fifth and later cycles 1 min 18 s before the scalp transition.