Biomedical Engineering Reference
In-Depth Information
(a)
(b)
HF:150 Hz
Voxel A
HF:100 Hz
A
nter
ior
Voxel B
Lateral
HF:75 Hz
-
-9
0
0
9
1
Phase (deg.)
(c)
200
150
100
50
30
-150
-100
-50
0
50
100
150
Time (ms)
Fig. 9.5
Results of cross-location PAC (xPAC) analysis.
a
Voxel locations for measuring the LF
and HF signals. The LF signal is measured at Voxel B and the HF signal is measured at Voxel A.
b
The amplitude-phase diagram for three HF sub-bands: 75
±
±
25 Hz (
top panel
), 100
25 Hz
(
middle panel
), and 150
25 Hz (
bottom panel
). Each
bar
indicates the mean amplitude value at
that phase bin. The
error bar
indicates the
±
±
standard deviation. The data in the time window from
−
5Hz.
c
The
phase-informed TF map. The amplitude of the HF signal is
color-coded
and displayed according to
the
color bar
. The sinusoidal plot shows cos
4
.
5to
−
2
.
5 s was analyzed and the frequency of the LF signal was fixed at 12
.
5
±
0
.
(ʸ
(
t
))
where
ʸ
(
t
)
is the instantaneous phase of the
L
L
LF signal. Only the portion between
±
150 ms from the LF peaks in the time window is displayed
computed the amplitude-phase diagrams using three sub-bands of the HF signal:
75
±
25, 100
±
25, and 150
±
25 Hz. The data in the time window of
−
4
±
1s was
±
used, and the frequency band of the LF signal was fixed at 12.5
0.5 Hz. The results
are shown in Fig.
9.5
b.
