Figure 4.

Changes in ‘ERP’ magnitude. (A) Average event-related synchronization (in % of the pre-stimulus reference interval) by sleep condition and electrode. At electrode Cc the magnitude was significantly larger after SR versus after habitual sleep, *P = 0.021. There was no sleep related differences at electrode Cz (P = 0.56). (B) ‘ERP’ magnitude increased with stimulus intensity (*P = 0.045), but there was no sleep × intensity interaction (P = 0.35). (C) The ‘ERP’ response habituated with stimulus block (**P < 0.001), but there was no sleep × block interaction (P = 0.68). Values are mean ± standard error of the mean. ‘ERP’, event-related potential in time-frequency domain; HS, habitual sleep; SR, sleep restriction.