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by pair t-test was to detect differences
between the performance with and without
visual feedback for the velocity of mandibular
movement.
Result
With visual feedback
The subjects were instructed to watch the
monitor and perform five continuous open-
close mandibular movement. In table 1, The
maximum velocity of the opening phase is
175.73mm/sec, while the average velocity is
97.13mm/sec, the maximum velocity of the
closing phase is ranging from 147.2mm/sec
to 337.6mm/sec, all the subjects demonstrate
a mean maximum velocity of the closing
phase is 227mm/sec, and the average
velocity of closing phase is 116.31mm/sec.
In this study, the terminal contact velocity is
36.36mm/sec.
Without visual feedback
All subjects were requested to close eye
in order to eliminate the effect of visual
feedback. In table 2, The maximum and
Table 1.
Open- close velocity (mm/sec) with visual feedback
Field N MEAN
STD
SEM
MIN
MAX
SUM
Opmax 18
175.73
54.232
12.798
91.6
328.00
3163.2
Opave 18
97.13
26.471
6.193
50.4
164.48
1748.3
Clomax 18
227.29
57.134
13.459
147.2
336
4091.2
Cloave 18
116.31
29.355
6.888
79.3
187.76
2093.5
Termin 18
31.20
15.794
3.723
11.2
67.20
561.6
N: number MEAN: mean velocity STD: standard deviation
SEM: standard error of mean MIN: minimum value of velocity
MAX: maximum value of velocity SUM: summation of data
Table 2.
Open-close velocity (mm/sec) without visual feedback
Field
N MEAN STD
SEM
MIN
MAX
SUM
Opmax
18 171.47
62.33
14.76
57.58
344.00
3320.5
Opave
18
97.10
28.46
6.69
51.12
176.02
1873.3
Clomx
18 232.21
43.81
10.30
1.60
308.80
4455.8
Cloave
18 121.21
30.34
7.11
78.32
202.50
2333.3
Termin
18
33.69
18.94
4.46
16.00
96.00
659.0
N: number MEAN: mean velocity STD: standard deviation
SEM: standard error of mean MIN: minimum value of velocity
MAX: maximum value of velocity SUM: summation of data
iomedical Engineering Association
The Influence of Visual Feedback on the Velocity of Mandibular Movement