<br>
<ul>
    <li>The higher the amplitude, with increasing frequency, the greater the chances that its muscle imitating beta.</li>
    <li>Muscle artifact will often occur in one or two channels </li>
    <li>Frontalis muscle artifact arrives at Fp1 &amp; Fp2</li>
    <li>Temporalis and massater muscle artifact arrives at T3/T4, F7 and F8</li>
    <li>Occipitalis muscle artifact arrives at O1 and O2</li>
</ul>
<br>
<div><img src="@@PLUGINFILE@@/emg.png?time=1564591360275" alt="Figure 1f: A stray line of high amplitude in the beta frequencies in a spectrum denotes deviant amplitude and is often an indicator that one electrode is picking up EMG." class="img-responsive atto_image_button_text-bottom" width="453" height="411"></div>
<p><i>Figure 1f: A stray line of high amplitude in the beta frequencies in a spectrum denotes deviant amplitude and is often an indicator that one electrode is picking up EMG.</i></p>
<br>
<h5><b>Massater Muscle (Chewing) Artifact (50–60 Hz)<br></b></h5>
<br>
<div style="text-align: center; "><img src="@@PLUGINFILE@@/massater.png?time=1564140872778" alt="Figure 1g: The massater muscle is responsible for mastication of food and can create high amplitude beta artifact in EEG data." width="400" height="396" class="img-responsive atto_image_button_middle"></div>
<p><i>Figure 1g: The massater muscle is responsible for mastication of food and can create high amplitude beta artifact in EEG data.</i></p>
<br>
<p>See a video of massater muscle artifact here (maximize the screen).&nbsp;&nbsp;&nbsp;<video width="600" height="400" controls="true"><source src="@@PLUGINFILE@@/Massater%20Chewing%20Video.mp4">@@PLUGINFILE@@/Massater%20Chewing%20Video.mp4</video>&nbsp;&nbsp;</p><br>
<h5><b>Occipital Muscle Artifact (Posterior EMG) (20–300 Hz)</b></h5>
<br>
<div style="text-align: center; "><img src="@@PLUGINFILE@@/artifact-muscle.gif" alt="Figure 1h: The occipitalis muscles are two rectangular-shaped muscles on the back of the skull, which can give pronounced EMG artifact at the O1 and O2 electrode sites." width="400" height="400" class="img-responsive atto_image_button_text-bottom"></div>
<p><i>Figure 1h: The occipitalis muscles are two rectangular-shaped muscles on the back of the skull, which can give pronounced EMG artifact at the O1 and O2 electrode sites.</i></p>
<br>
<div style="text-align: center; "><img src="@@PLUGINFILE@@/emg-artifact.png?time=1564141541047" alt="Figure 1i: Summary page of a Quantitative EEG showing occipitalis EMG artifact. Image generated from Neuroguide version 3.0.6." width="600" height="797" role="presentation" class="img-responsive atto_image_button_text-bottom"></div>
<p style="text-align: center; "><i>Figure 1i: Summary page of a Quantitative EEG showing occipitalis EMG artifact. Image generated from Neuroguide version 3.0.6.</i></p>
<p style="text-align: center;"><br></p>
<p style="text-align: center; ">See a video of occipitalis muscle artifact here.&nbsp;&nbsp;&nbsp;&nbsp;</p><p style="text-align: center; "><video width="600" height="400" controls="true" class=""><source src="@@PLUGINFILE@@/Occipitalis%20Artifact.mp4">@@PLUGINFILE@@/Occipitalis%20Artifact.mp4</video>&nbsp;&nbsp;&nbsp;</p>
<br>
<h5><b>Temporalis Muscle Artifact (40–80Hz)</b></h5>
<p>The temporalis muscle elevates, retracts, and moves the jaw from side to side.</p>
<br>
<div style="text-align: center; "><img src="@@PLUGINFILE@@/temporalis.png?time=1564141213287" alt="Figure 1j: The temporalis muscle is a large fan-shaped muscle that covers the sides of the skull." width="600" height="711" role="presentation" class="img-responsive atto_image_button_text-bottom"></div>
<p style="text-align: center; "><i>Figure 1j: The temporalis muscle is a large fan-shaped muscle that covers the sides of the skull.</i></p><p style="text-align: center; ">The temporalis muscle is responsible for the most common type of artifact, EMG at T3 and T4.</p><p style="text-align: center; ">&nbsp;&nbsp;&nbsp;<video controls="true"><source src="@@PLUGINFILE@@/temporalis%202.mp4">@@PLUGINFILE@@/temporalis%202.mp4</video>&nbsp;<span style="font-size: 1rem;">&nbsp;</span><span style="font-size: 1rem;">&nbsp;</span></p><p style="text-align: center;"><span style="font-size: 1rem;">Temporalis artifact at T3 and T4 will create a map that looks like this:&nbsp;</span></p><p style="text-align: center;"><img src="@@PLUGINFILE@@/Temporalis%20Map.jpg" alt="Temporalis Map" width="600" height="492" style="font-size: 1rem;" class="img-responsive atto_image_button_middle"></p><p style="text-align: center; "><i>Figure 1k: The temporalis muscle can generate artifact in the left or right temporal electrodes, as we see here, with a high amplitude beta artifact arising from T4. Image generated from Neuroguide version 3.0.6.</i></p><p style="text-align: center;"><br></p><br><h5><b>Frontalis (wrinkling forehead) 30–40Hz</b></h5><br><div style="text-align: center; "><img src="@@PLUGINFILE@@/frontalis.png?time=1564141288057" alt="Figure 1k: The frontalis muscle is responsible for much of our expression, wrinkling the forehead and furrowing the brow. Muscle artifact from the frontalis muscle will affect Fp1, Fp2, and Fz electrodes, but may also affect F7, F8 and Fz electrodes." width="300" height="358" role="presentation" class="img-responsive atto_image_button_text-bottom"></div><p style="text-align: center; "><i>Figure 1l: The frontalis muscle is responsible for much of our expression, wrinkling the forehead and furrowing the brow. Muscle artifact from the frontalis muscle will affect Fp1, Fp2, and Fz electrodes, but may also affect F7, F8 and Fz electrodes.</i></p><p style="text-align: left;"><span style="font-size: 1rem;">Frontalis muscle artifact is caused by the muscles in the forehead. To check if frontal EEG is real or fake, you will want to</span></p><ul><li>Drop the low pass band filter</li><li>Check for field and phase</li></ul><p>This video is one where we are examining EEG activity in the frontal electrodes to determine if it is real or fake. We examine the waveform and then switch to a deymed montage (in neuroguide software) which shows us the electrodes in sequential order. In this video, the neighboring electrodes have similar field and phase, which means the EEG activity is real! This person has high amplitude frontal beta.&nbsp;</p><p style="text-align: center; ">&nbsp;&nbsp;&nbsp;<video width="600" height="400" controls="true" class=""><source src="@@PLUGINFILE@@/Frontalis%20Video.mp4">@@PLUGINFILE@@/Frontalis%20Video.mp4</video>&nbsp;&nbsp;<br></p>This is the QEEG Map we would see with this type of high amplitude frontal activity.<br><div style="text-align: center; "><img src="@@PLUGINFILE@@/linkears.png?time=1564141620674" alt="Figure 1l: Summary page of a Quantitative EEG showing frontalis EMG artifact. Image generated from Neuroguide version 3.0.6." role="presentation" width="712" height="956"></div><p style="text-align: center; "><i>Figure 1m: Summary page of a Quantitative EEG showing high amplitude frontal beta. Image generated from Neuroguide version 3.0.6.</i></p><p style="text-align: center;"><br></p><div></div><br><p><br>

</p><br>Sometimes the temporalis muscle affects the electrodes F7 and F8, as we see in this image<br><div style="text-align: center; "><img src="@@PLUGINFILE@@/linkears-2.png?time=1564141695313" alt="Figure 1m: The temporalis muscle can generate artifact in the temporal electrodes (T3, T4, T5, or T6, as well as the left or right frontal electrodes, as we see here, with a high amplitude beta artifact arising from F8. Image generated from Neuroguide version 3.0.6." width="600" height="796" role="presentation" class="img-responsive atto_image_button_middle"></div><p><i>Figure 1n: The temporalis muscle can generate artifact in the temporal electrodes (T3, T4, T5, or T6, as well as the left or right frontal electrodes, as we see here, with a high amplitude beta artifact arising from F8. Image generated from Neuroguide version 3.0.6.</i></p><p><br></p>