International Scholarly Research Notices

Research Article

A Recurrent Increase of Synchronization in the EEG Continues from Waking throughout NREM and REM Sleep

Table 2

Mean interhemispheric and transhemispheric pointwise transinformation (PTI) for waking and sleep stages.


	FP1-FP2	F3-F4	C3-C4	P3-P4	O1-O2	F7-F8	T3-T4	T5-T6	A1-A2	F3-O1	F4-O2

W_day	0.271	0.163	0.104	0.111	0.208	0.098*	0.072*	0.193	0.220	0.164	0.157
W_night	0.273	0.174	0.109	0.117	0.219	0.110*	0.068*	0.185	0.236	0.169	0.169
N1	0.320	0.203	0.139	0.142	0.250	0.123*	0.091*	0.205	0.312	0.197	0.176
N2	0.348	0.235	0.146	0.157	0.272	0.154	0.099	0.243	0.343	0.200	0.207
N3	0.563	0.406	0.202	0.232	0.402	0.251	0.192	0.372	0.455	0.350	0.369
R	0.249	0.144*	0.096	0.119	0.184	0.094*	0.066*	0.146*	0.217	0.117	0.126

Mean PTI of the waking phases during daytime (W_day) and nighttime (W_night) does not differ. Significant differences of mean PTI (*) were found only for N3 versus W_day, W_night, N1, and R in the anterior and midtemporal channels and for N3 versus R also in the frontal and posterior temporal channels. This effect is probably caused by the large amount of delta waves in N3, which increase the duration of single synchronized episodes and, thus, the mean synchronization (see Section 4 for details).