<div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:12.7273px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;display:inline!important;float:none;background-color:rgb(255,255,255)">Dear friends,<br>

</span></div><div><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:12.7273px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;display:inline!important;float:none;background-color:rgb(255,255,255)"><br>

</span></div><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:12.7273px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;display:inline!important;float:none;background-color:rgb(255,255,255)">I'm new to this list and to EEG research.</span>I have several elementary questions. <br>

It would be great if you could share some of your experience with me. <br><br>I'm starting a research project that utilizes EEG to better understand humans sleep quality.<br><div><div><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:12.7273px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;display:inline!important;float:none;background-color:rgb(255,255,255)"><br>

</span></div><div><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:12.7273px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;display:inline!important;float:none;background-color:rgb(255,255,255)">1. What is the minimum number of electrodes that should be used and their locations to</span><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:12.7273px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;display:inline!important;float:none;background-color:rgb(255,255,255)"> successfully detect sleep cycles and their characteristics such as </span><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:12.7273px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;display:inline!important;float:none;background-color:rgb(255,255,255)"><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:12.7273px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;display:inline!important;float:none;background-color:rgb(255,255,255)">alpha, theta, spindles and k-complex</span>? <br>

</span></div><div><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:12.7273px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;display:inline!important;float:none;background-color:rgb(255,255,255)">2. Are there any ways to evaluate and measure the quality of signals that are received from a device?  <br>

</span></div><div><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:12.7273px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;display:inline!important;float:none;background-color:rgb(255,255,255)">3. Can you recommend on an inexpensive EEG device which you think can provide quality data for researching ERP and sleep cycles.<br>

<br></span></div><div><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:12.7273px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;display:inline!important;float:none;background-color:rgb(255,255,255)">Best regards, <br>

</span></div><div><span style="color:rgb(80,0,80);font-family:arial,sans-serif;font-size:12.7273px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;display:inline!important;float:none;background-color:rgb(255,255,255)">Robert<br>

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