Cognionics CGX Mobile-128 Manual
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Cognionics CGX Mobile-128 Manual

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CGX A Cognionics Company
Mobile-128
This manual contains general operating instructions, precautionary measures,
maintenance instructions, and information for use of the CGX Mobile-128.
Please read this manual carefully and familiarize yourself with the controls and
accessories before using the product.
Note
This is an investigational device designed for research and development efforts.
•
It is not an FDA-approved medical device.
•
There are no known side effects from the use of this product.
•
Description
The Mobile-128 is a wireless, high
density gel EEG system.
The amplifier provides wireless
acquisition of recorded EEG signals.
Wireless technology allows the subject
to move about while real-time data is
collected and displayed. EEG channels
are sampled at a time resolution of
500Hz and converted to digital data at
24 bits of resolution.
The Mobile-128 provides research
grade signal quality and is ideally
suited for high-density EEG and
ERP research in laboratory and field
environments.

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Summary of Contents for Cognionics CGX Mobile-128

  • Page 1 CGX A Cognionics Company Mobile-128 This manual contains general operating instructions, precautionary measures, maintenance instructions, and information for use of the CGX Mobile-128. Please read this manual carefully and familiarize yourself with the controls and accessories before using the product.
  • Page 2 Warnings Any medical diagnosis related to the EEG The Mobile-128 is intended to be used • to acquire the electroencephalogram should be derived by a certified physician. (EEG) and transmit it wirelessly to a Subject Considerations computer. This device is intended for human use • This Device Is Intended For Research only. Only. Follow These Advisories To Keep Your It Is Not Intended For The Following Mobile-128 In Good Working Order Uses: Do not immerse in liquid. •...
  • Page 3 Device Overview The Package Contains The Bluetooth Dongle Following Items 2 Syringes 3 Tubes EEG SignaGel Mobile-128 Amplifier 2 Rechargeable Li-Ion Batteries Mobile-128 Electrodes 1 Charger Mobile-128 Electrode Breakout Box Carrying Case 3 EEG Caps (54 cm, 56 cm, 58 cm) Manual Harness Mobile-128 Headset Electrode Bundle Electrodes Chin Strap...
  • Page 4 Preparation 1. Install The Software Download the latest software from CGXSystems.com Note: CGX Acquisition software runs on Windows only. Navigate to CGXSystems.com • Select from the top navigation menu. • Downloads Select • Click Here For Acquisition Software Choose the latest version link under “Downloading and • Installing the Software.” Extract the zipped file to your desktop. •...
  • Page 5 Once you’ve established a connection, data should begin to stream. Double click on the CGX Acquisition software icon. You should see under CGX Mobile-128 Discovered Devices. If you do not see the name CGX Mobile-128, remove and re-insert the dongle and restart the software.
  • Page 6 Preparation Click the device name in this window to select the Impedance Map Under The Channels Tab Mobile-128 and click Connect. 20 Channels Shown For Clarity You should now see the device configuration window. Acceptable If you do not, double check to make sure the Mobile-128 is powered on.

  • Page 7: Disposal Instructions

    Preparation 11. Adjust Electrodes If Required Use the impedance check to make sure impedances are • within acceptable thresholds. If channels do not appear shortly after applying gel, check • left ear (Ref) and AFz (Gnd) contact and add more gel if necessary. 12. Record An EEG After you have acceptable impedance levels, click Record under the Device tab to begin your recording.
  • Page 8 Obtaining Clean EEG Data The most important aspect of EEG recording is that Mobile-128 sensor locations output data is only as good as the recording input. While lie within 1.0 centimeters on the vast majority of hand- algorithms exist to remove artifacts, poorly recorded data measured 10-5 placements cannot be fixed in post processing.
  • Page 9 Understanding Readings (20 Channels Shown For Clarity) Clean Data At Default Scale Traces are thin and deviate minimally from the axis. Blinks Eye blinks will generate muscle artifacts in the frontopolar locations (Fp1 and Fp2) and less so in frontal sensors (F3/F4, F7/F8), overshadowing brain activity in EEG recordings. Eye Movement Moving the eyes will generate muscle artifact in the forehead and front of the head.
  • Page 10 Understanding Readings (20 Channels Shown For Clarity) Muscle Artifact: Jaw Clench Jaw clenching may affect most or all channels, especially if clenching hard. Light jaw clenching or tightness can be observed in F7/F8, T3/T4. Take note of any temporomandibular joint disorders: these can cause artifact without typical clenching. Muscle Artifact: Tongue Movement The tongue is a large polarized muscle, with the tongue’s tip negative with...
  • Page 11 Understanding Readings (20 Channels Shown For Clarity) Muscle Artifact: Neck Tension Neck tension may affect channels on the back of the head, predominantly O1/O2, but also in parietal sensors (Pz/P3/P4, P7/P8). Subjects should be comfortably seated, with appropriate bracing at the back and neck. Avoid slouching. Headset Or Electrode Disruptions: Sensor Pops Brief disruptions in contact between sensor and scalp may cause “sensor pops”...
  • Page 12 Understanding Readings (20 Channels Shown For Clarity) Pulse Artifact EEG sensors are sensitive enough to detect small electrical signals on the cortex. Occasionally, sensors may lie directly atop a blood vessel. When this occurs, sensors may detect the subject’s pulse. Slightly move the sensors to reduce pulse artifacts.
  • Page 13 Understanding Readings (20 Channels Shown For Clarity) Improper Setup: No Connected Reference There are a multitude of recording errors when the A1 reference earclip is not connected to the subject. The most common are: • Impedances match or nearly match at a low value but do not appear on the display or in the impedance head map.
  • Page 14 Understanding Readings (20 Channels Shown For Clarity) Improper Setup: Reference Contact When the reference channel is touched or jostled, all channels will be affected. Avoid disrupting the A1 Reference earclip during use. Improper Setup: Reference Disruption When the reference is disconnected, all channels will disconnect as well. Improper Setup: Ground Disruption If the ground has poor contact, all channels will be impacted.
  • Page 15 Software Reference Device Tab Device Configuration Connected dongles will be listed • Discovered Devices here. Select the device name of your system and hit Connect The software automatically connects to your device to • retrieve stored settings. window is only for your • Device Configuration information;...

  • Page 16: Software Reference

    Software Reference Display Tab Scaling: Headset The display tab controls scaling and other viewing sets the x axis time window. By default, it is set to 2 • Time parameters for the signals. seconds. sets the y axis vertical gain for the EEG • Scale (EEG) channels on the head.

  • Page 17: Channels Tab

    Software Reference Channels Tab The bottom half is a graphical map of sensor contact The top half of the Channels tab contains a table quality. Red circles indicate poor contact, whereas light displaying information about green circles indicate acceptable contact. Dark green each channel in the system circles indicate ideal contact.
  • Page 18 Software Reference Markers Tab Received Triggers The box shows all of the received triggers chronologically. • If no trigger is in range, value received will be 47831 (in • hex: 0xBAD7). This button will clear all of the triggers in the • Clear History box.

  • Page 19: Status Tab

    Software Reference Status Tab Transmission Allows you to see the bandwidth being used • Data Rate for the data being sent. Shows you the ratio at which data is • Compression Ratio being compressed and sent to the computer. Shows the amount of information dropped • Lost Packets in communications between the headset and the computer, increasing as the headset moves away from...

  • Page 20: Specifications

    Attn: Service Returns 8445 Camino Santa Fe, #213 All units returned to CGX for repair must San Diego, CA 92121 have an RA number issued by CGX. CGX A Cognionics Company 8445 Camino Santa Fe, #213 Imported By: San Diego, CA 92121 Brain Products GmbH 858-864-9400 Zeppelinstrasse 7 Sales@CGXSystems.com...

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