Figure 92 Time ms Amplitude deg Amplitude deg Eye Velocity degs V pk D deg 0 50 100 0 10 20 30 40 0 ID: 478620
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Slide1
Figure 9-1Slide2
Figure 9-2
Time [ms] Amplitude [deg] Amplitude [deg]
Eye Velocity [deg/s]
V
pk
D [deg]
0 50 100 0 10 20 30 40 0 10 20 30 40
0
500
7
o
18
o
27
o
0
45
60
1
5
k
= 1.65
S < 0.9
S > 1.1
0.9<S < 1.1
slow saccades
fast
saccades
A
B
C
slow + fast
saccadesSlide3
Figure 9-3Slide4
Figure 9-4
S
accades
Abducens
s
pike trains
PSTH
-300 -200 -100 0 100 200 300 400 ms
Pulse
Slide
Step
Step
Fixate
Fixate
SaccadeSlide5
Figure 9-5
M
otor
Plan
Neural
Integrator
Pulse
Scaling
Pulse
Slide
Step
PLANT
Slide
Nonlinear
Pulse Generator
f
eedback
INPUT
OUTPUTSlide6
Figure 9-6
SC
motor plan
∫
m
e
(t)
v
(t)
+
-
m
e
v
(t)
t
o PSG
Pulse
ΔE
v
(t)
v
elocity feedback
MLB Pulse Generator
LLBNSlide7
Figure 9-7
H
V
A
C
BSlide8
Figure 9-8
10
0
-10
10
0
-10
0 10 20 0 10 20
Horizontal eye position [deg]
Vertical eye position [deg]
Single
Double
F
F
F
F
T
1
T
2
T
1
T
2
T
1
T
2
T
1
T
2
∆Φ=30˚
∆Φ=90˚
A
B
C
DSlide9
G
S
E
H
H
S
5 deg
100 ms
ΔE
H
ΔH
S
ΔG
S
H
ON
G
ON
G
OFF
H
OFF
Vestibular
Ocular Reflex
VOR
ON
Gaze Shift
Head
Movement
Eye
Saccade
VOR
ON/OFF
VOR
OFF
Drift (~2˚)
Eye End
Position
Figure 9-9Slide10
Figure 9-10
E
H
ΔG
Legend:
GM = gaze motor error
HM = head motor error
DEP = desired eye position
l
imit = Oculomotor range
EM = eye motor error
DEV = desired eye velocity
EV = eye velocity
HV = head velocity
EP = eye position
SSC = semicircular canals
OMR
hor
ver
H
S
ΔHSlide11
Figure 9-11Slide12
Figure 9-12Slide13
Figure 9-13Slide14
X
L
X
R
U
L
U
R
U
ΔU
U
-ΔU
Figure 9-14