WEBVTT
NOTE duration:"00:02:40.3360000"
NOTE language:en-us
00:00:01.110 --> 00:00:05.140
Nerve conduction testing is a
means of assessing the integrity
00:00:05.140 --> 00:00:06.752
of the peripheral nervous
00:00:06.752 --> 00:00:11.568
system. A low voltage electrical impulse is applied directly to the
00:00:11.568 --> 00:00:13.728
nerve, resulting in a muscle
00:00:13.728 --> 00:00:16.870
Twitch. This video will
demonstrate stimulation
00:00:16.870 --> 00:00:18.518
of the median nerve.
00:00:19.700 --> 00:00:24.130
Prepared the electrode sites by cleaning with Kim Wipes New
00:00:24.130 --> 00:00:25.459
Prep and alcohol.
00:00:26.240 --> 00:00:30.750
The recording electrodes will be
placed over the muscle belly of
00:00:30.750 --> 00:00:32.390
the abductor brevis pollicis
00:00:32.390 --> 00:00:36.593
muscle. We want to place
the ground electrode on a
00:00:36.593 --> 00:00:40.410
Bony landmark, so in this case we will use the ulnar
00:00:40.410 --> 00:00:42.839
stylus process as our
ground electrode location.
00:00:44.180 --> 00:00:47.978
Prior to data collection, check
the impedance of your
00:00:47.978 --> 00:00:51.986
electrodes. A value other than '1' is acceptable.
00:00:52.620 --> 00:00:57.614
If you do not achieve the proper impedance levels, remove the
00:00:57.614 --> 00:01:02.154
electrodes re prep the site and apply new electrodes before
00:01:02.154 --> 00:01:03.516
beginning data collection.
00:01:04.750 --> 00:01:09.458
Connect the EMG lead to the
EMG electrodes. The red and
00:01:09.458 --> 00:01:12.882
black heads connect to the
recording electrodes. The
00:01:12.882 --> 00:01:15.450
Whitehead connects to the
ground electrode.
00:01:17.990 --> 00:01:23.638
Adjust channel 1 settings for
your EMG collection.
00:01:25.000 --> 00:01:27.430
Gains should be set to 100.
00:01:28.090 --> 00:01:32.060
Gain is multiplied by a
factor of 10, so this
00:01:32.060 --> 00:01:33.648
gain is actually 1000.
00:01:35.560 --> 00:01:37.159
The band Pass.
00:01:37.900 --> 00:01:43.372
Should be set to a low
frequency of 10 and a high
00:01:43.372 --> 00:01:47.932
frequency of 1. This high frequency is actually in KiloHertz,
00:01:47.932 --> 00:01:50.668
so your hype is 1000 Hertz.
00:01:51.930 --> 00:01:56.466
This represents the frequency
content of an EMG signal,
00:01:56.466 --> 00:02:00.498
which is typically between 10
and 1000 Hertz.
00:02:01.730 --> 00:02:06.032
Connect the EMG lead to the
isolation preamplifier according
00:02:06.032 --> 00:02:11.768
to the colours indicated on the cords. Red to red, black to
00:02:11.768 --> 00:02:16.070
black, white to white. Remember, white is your ground electrode.
00:02:17.550 --> 00:02:22.338
Connect to BNC cable from channel 1 on the back of the
00:02:22.338 --> 00:02:26.328
bio amplifier to channel 1 of the A/D unit.
00:02:27.080 --> 00:02:32.960
This is marked as a IO. It is
the first input channel.
00:02:34.310 --> 00:02:37.680
Once you have connected all
your equipment, you are now
00:02:37.680 --> 00:02:39.028
ready to collect data.