MindMedia EEG User Manual
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MindMedia EEG User Manual

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User Guide
EEG
This user guide has been created to educate and inform the reader about doing EEG
measurements with NeXus.
For more information about NeXus, our BioTrace+ software, please visit our website or
contact us.
www.mindmedia.com
The copyright of this document remains with Mind Media BV © 2018, and the contents of it may not be altered or
copied. However we do permit unlimited distribution by electronics means of this document in the unaltered digital
PDF format in which it is supplied. This document is not intended to replace scientific and clinical literature.
V2.3

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  • Page 1 User Guide This user guide has been created to educate and inform the reader about doing EEG measurements with NeXus. For more information about NeXus, our BioTrace+ software, please visit our website or contact us. www.mindmedia.com The copyright of this document remains with Mind Media BV © 2018, and the contents of it may not be altered or copied.

  • Page 2: Table Of Contents

    One position EEG ........................... 17 Two positions EEG ......................... 20 Four positions EEG ......................... 23 EEG/EXG sensor TP setup with cup or ring electrodes ............... 26 One position EEG ........................... 26 Two positions EEG ......................... 28 Four positions EEG ......................... 30 BioTrace+ ............................

  • Page 3: Introduction

    Introduction This manual provides a step-by-step review of how to do EEG measurements with the NeXus-4, NeXus-10 or NeXus-32. The manual provides information about the required hardware, preparation and measurement steps, background information on artefacts (appendix 1) and care of materials (appendix 2).

  • Page 4: Required Equipment

    Depending on the chosen setup, the following items are required to perform EEG measurements: Nexus-4, NeXus-10 or NeXus-32 EXG Sensor, EEG Linked Ear Sensor (2 or 4 channel), EXG TP Sensor or EEG Linked Ear TP Sensor (2 or 4 channel) EXG Ground or EXG Ground TP...

  • Page 5: Eeg Measurement Setup

    NeXus can be found in the NeXus User Manual or Quick Start. The NeXus-4 can measure up to two positions EEG, the NeXus-10 up to 4 and the NeXus-32 up to 21 positions of EEG. Please refer to the User Guide NeXus-32 qEEG for a 21 channel cap measurement.

  • Page 6: Eeg/Exg Sensor Setup With Disc Electrodes

    NeXus-10 or upward with the NeXus-32. With the EXG sensor A1/M1 or A2/M2 are used as reference. Alternatively, the EEG Linked Ear sensor (2 or 4 channel) can be used for a single channel linked ear referenced setup. In that case, the placement of reference and ground is similar to two positions EEG setup.
  • Page 7 Place the black snap-on of pair one of the EXG sensor and the ground snap-on together with EEG disc (ear) electrodes on to an ear clip. For placing EEG electrodes on the ears with EEG/ExG sensors with LOT numbers L2101 and onwards (February 2021), the EEG Disc Ear Electrodes are used in combination with ear clips: Determine electrode positions according to the 10-20 system by using measuring tape and marking positions with a skin marker.
  • Page 8 Use the clip of the EXG cable to attach the EXG sensor to prevent pulling of the cables. Apply some electrode paste (e.g. Ten20) to the electrodes by using for example a scoop. Place the ear clip with the black (reference) snap-on with electrode on to the earlobe of the same side (ipsilateral) of the location of interest.
  • Page 9 Minicap Optionally use the Minicap or Microcap to fix the electrodes. The Minicap also allows for placing the electrodes on the mastoids instead of the ear. Now go to chapter ‘BioTrace+’ for further instructions. Page 9 of 66...

  • Page 10: Two Positions Eeg

    10-20 system. Use the EEG Linked Ear sensor (2 or 4 channel), to create a linked-ear reference for both positive electrodes. For use of the older linked ear cable, please refer to Appendix 4: Linked Ear cable setup.
  • Page 11 Determine electrode positions according to the 10-20 system by using measuring tape and marking positions with a skin marker. Rub the skin with a cotton swab and Nuprep at all electrode positions. Remove remaining gel with a tissue. As an alternative to using Nuprep, alcohol pads are sometimes used. Use the clip of the EXG cable to attach the EXG sensor to prevent pulling of the cables.
  • Page 12 Place the ear clips with the black (reference) snap-on with electrode on to the left and right earlobe. Place the ground electrode preferably near the other reference electrodes on the scalp. Place the red (positive) snap-ons with electrode on to the skin at the location of interest. Minicap Optionally use the Minicap or Microcap to fix the electrodes.

  • Page 13: Four Positions Eeg

    27&28 on the NeXus-32. Make sure the red dot of the connector is facing downward with the NeXus-10 or upward with the NeXus-32. For a 4 positions EEG setup with the older EEG linked- ear cables and EXG sensor, please refer to Appendix 4: Linked Ear cable setup. A bipolar measurement setup will be created by placing the reference on the head, according to the 10- 20 system.
  • Page 14 Place the two black snap-ons together with disc electrodes on to an ear clip. For placing EEG electrodes on the ears with EEG/ExG sensors with LOT numbers L2101 and onwards (February 2021), the EEG Disc Ear Electrodes are used in combination with ear clips: Determine electrode positions according to the 10-20 system by using measuring tape and marking positions with a skin marker.
  • Page 15 Use the clip of the EXG cable to attach the EXG sensor to prevent pulling of the cables. Apply some electrode paste (e.g. Ten20) to the electrodes by using for example a scoop. Place the ear clips with the black (reference) snap-on with electrode on to the left and right earlobe.
  • Page 16 Minicap Optionally use the Minicap or Microcap to fix the electrodes. Now go to chapter ‘BioTrace+’ for further instructions. Page 16 of 66...

  • Page 17: Eeg/Exg Sensor Tp Setup With Minicap Electrodes

    NeXus-10 or upward with the NeXus-32. With the EXG sensor A1/M1 or A2/M2 are used as reference. Alternatively, the EEG Linked Ear sensor (2 or 4 channel) can be used for a single channel linked ear referenced setup. In that case, the placement of reference and ground is similar to two positions EEG setup.
  • Page 18 Place the black TP connection (reference) with electrode of pair one and the ground with electrode on to an ear clip. Determine electrode positions according to the 10-20 system by using measuring tape and marking positions with a skin marker. Use the clip of the TP cable to attach the TP sensor to prevent pulling of the cables.
  • Page 19 Due to the fluid nature of electro gel, rubbing the skin with an abrasive gel is usually not necessary. When using electrode paste (e.g. Ten20), rub the skin with a cotton swab and Nuprep at all electrode positions. The location of the ground electrode is preferably near other electrodes on the scalp.

  • Page 20: Two Positions Eeg

    NeXus-10 or upward with the NeXus-32. With the EXG sensor A1/M1 or A2/M2 are used as reference. Use the EEG Linked Ear sensor (2 or 4 channel), to create a linked-ear reference for both positive electrodes. For use of the older linked ear cable, please refer to Appendix 4: Linked Ear cable setup.
  • Page 21 Place the Minicap or Microcap on the head. Apply some Electro gel to the electrodes by using a cotton swab or a syringe with blunt needle. Due to the fluid nature of electro gel, rubbing the skin with an abrasive gel is usually not necessary. When using electrode paste (e.g.
  • Page 22 Place the ground electrode preferably near the other reference electrodes on the scalp. Use the Minicap or Microcap to fix the electrodes. Place the red (positive) electrodes on to the skin at the location of interest. Use the Minicap or Microcap to fix the electrode. The Minicap also allows for placing the electrodes on the mastoids instead of the ear.

  • Page 23: Four Positions Eeg

    27&28 on the NeXus-32. Make sure the red dot of the connector is facing downward with the NeXus-10 or upward with the NeXus-32. For a 4 positions EEG setup with the older EEG linked- ear cables and EXG sensor, please refer to Appendix 4: Linked Ear cable setup.
  • Page 24 Place Minicap electrodes on to the red TP connections and place a Minicap electrode on to the ground TP connection. Slightly twist the connector in to EXG TP connection in order to make good connection. Place black Minicap electrodes on to the black TP connections Place the black TP connection (reference) electrodes on to an ear clip.
  • Page 25 Apply some Electro gel to the electrodes by using a cotton swab or a syringe with blunt needle. Due to the fluid nature of electro gel, rubbing the skin with an abrasive gel is usually not necessary. When using electrode paste (e.g. Ten20), rub the skin with a cotton swab and Nuprep at all electrode positions.

  • Page 26: Eeg/Exg Sensor Tp Setup With Cup Or Ring Electrodes

    NeXus-10 or upward with the NeXus-32. With the EXG sensor A1/M1 or A2/M2 are used as reference. Alternatively, the EEG Linked Ear sensor (2 or 4 channel) can be used for a single channel linked ear referenced setup. In that case, the placement of reference and ground is similar to two positions EEG setup.
  • Page 27 Determine electrode positions according to the 10-20 system by using measuring tape and marking positions with a skin marker. Rub the skin with a cotton swab and Nuprep at all electrode positions. Remove residual gel with a tissue. As an alternative to using Nuprep, alcohol pads are sometimes used. Use the clip of the TP cable to attach the TP sensor to prevent pulling of the cables.

  • Page 28: Two Positions Eeg

    NeXus-10 or upward with the NeXus-32. With the EXG sensor A1/M1 or A2/M2 are used as reference. Use the EEG Linked Ear sensor (2 or 4 channel), to create a linked-ear reference for both positive electrodes. For use of the older linked ear cable, please refer to Appendix 4: Linked Ear cable setup.
  • Page 29 Use the clip of the TP cable to attach the TP sensor to prevent pulling of the cables. Apply some electrode paste (e.g. Ten20) to the electrodes by using for example a scoop. Place the black (reference) electrodes on to the left and right earlobe. Place the ground electrode preferably near the other reference electrodes on the scalp.

  • Page 30: Four Positions Eeg

    27&28 on the NeXus-32. Make sure the red dot of the connector is facing downward with the NeXus-10 or upward with the NeXus-32. For a 4 positions EEG setup with the older EEG linked- ear cables and EXG sensor, please refer to Appendix 4: Linked Ear cable setup.
  • Page 31 Place cup or ring electrodes on to the red TP connections and place a cup or ring electrode on to the ground TP connection. Slightly twist the connector in to EXG TP connection in order to make good connection. Place black cup or ring electrodes on to the black TP connections Place the black TP connection (reference) electrodes on to an ear clip.
  • Page 32 Place the red (positive) electrodes on to the skin at the locations of interest. Now go to chapter ‘BioTrace+’ for further instructions. Page 32 of 66...

  • Page 33: Biotrace

    Select EEG. Select your preferred measurement screen, depending on number of positions (e.g. 1 position EEG 1 band). The EEG visualizations differ from each other in Number of channels: e.g. 1x EEG, 2x EEG. Showing specific frequency bands: e.g. SMR, Gamma Additional signals.
  • Page 34 Click the recording button. The select a client dialog box will appear. Select a client and click Continue... or click Add New for adding a new client. The New session recording screen will appear. Click Start recording to start recording a session.
  • Page 35 Visually inspect the EEG to pinpoint and possibly reduce artifacts. Prevention is better than to cure and prevents having to mark and remove artifacts afterwards. For more details about the following artifacts, see the Appendix 2: Artifacts. • Muscle tension Electrical activity of the muscles occurs, (head, shoulders, tongue, jaws, etc.).
  • Page 36 Train up Train down Feedback Type Controls are shown on the right side of a training screen. Press the Windows logo key +P for extending display to dual monitor setup Select one of the feedback options that are available on the right side. Graph Disc Video...

  • Page 37: Appendix 1: 10-20 Eeg System

    Appendix 1: 10-20 EEG system Use the Internationally accepted 10-20 EEG system for EEG electrode placement. Page 37 of 66...

  • Page 38: Appendix 2: Artifacts

    EEG signals. • Cardiac signals In some cases the electrical signal of the heart (ECG) can show up in the EEG. The pulsation of veins below an electrode can also cause short spike in the EEG. This artifact is relatively rare.

  • Page 39: Appendix 3: Care Of Materials

    Appendix 3: Care of materials NeXus EXG sensor cleaning The NeXus EXG sensors can only be cleaned. There are no procedures or prescriptions for disinfecting. The sensor cables and snap-ons can be cleaned with lukewarm water and with an alcohol solution (70%) or alcohol prep pads (do not submerge in water or in alcohol solution).

  • Page 40: Appendix 4: Linked-Ear Cable Setup

    * Recommended use is 10-20 times. The layer of Ag/AgCl will gradually wear off influencing signal quality. * For placing EEG electrodes on the ears with EEG/EXG sensors with LOT numbers L2101 and onwards (March 2021), the EEG Disc Ear Electrodes are used in combination with ear clips.
  • Page 41 Place a disc electrode on to the red snap-on of pair one of the EXG sensor. Place the black snap-on of pair one of the EXG sensor and the ground snap-on together with disc electrodes on to an ear clip. Determine electrode positions according to the 10-20 system by using measuring tape and marking positions with a skin marker.
  • Page 42 Place the ear clip with the black (reference) snap-on with electrode on to the earlobe of the same side (ipsilateral) of the location of interest. Place the earclip with ground snap-on with electrode on to the other earlobe. Place the red (positive) snap-on with electrode on to the skin at the location of interest. Minicap Optionally use the Minicap or Microcap to fix the electrodes.

  • Page 43: Two Positions Eeg

    Two positions EEG Connect the EXG Sensor to input A&B of the NeXus-4 or NeXus-10 and input 25&26 of the NeXus-32. Make sure the red dot of the connector is facing downward with the NeXus-4 or NeXus-10 or upward with the NeXus-32.
  • Page 44 Rub the skin with a cotton swab and Nuprep at all electrode positions. Remove remaining gel with a tissue. As an alternative to using Nuprep, alcohol pads are sometimes used. Use the clip of the EXG cable to attach the EXG sensor to prevent pulling of the cables. Apply some electrode paste (e.g.
  • Page 45 Minicap Optionally use the Minicap or Microcap to fix the electrodes. Now go to chapter ‘BioTrace+’ for further instructions. Page 45 of 66...

  • Page 46: Four Positions Eeg

    Four positions EEG When measuring four positions EEG, a linked-ear setup is recommended. Connect the linked- ear cables to input A&B and C&D on the NeXus-10 and input 25&26 and 27&28 on the NeXus- 32. Make sure the red dot of the connector is facing downward with the NeXus-10 or upward with the NeXus-32.
  • Page 47 Place disc electrodes on to the four red snap-ons of the EXG sensor and place a disc electrode on to the EXG ground snap-on. Place the two black snap-ons of the EXG sensor which is connected to input A&B of the NeXus-10 and input 25&26 of the NeXus-32 together with disc electrodes on to an ear clip.
  • Page 48 Apply some electrode paste (e.g. Ten20) to the electrodes by using for example a scoop. Place the ear clips with the black (reference) snap-on with electrode on to the left and right earlobe. Place the ground electrode preferably near the other reference electrodes on the scalp. Place the red (positive) snap-ons with electrode on to the skin at the location of interest.
  • Page 49 Minicap Optionally use the Minicap or Microcap to fix the electrodes. Now go to chapter ‘BioTrace+’ for further instructions. Page 49 of 66...

  • Page 50: Exg Sensor Tp Setup With Minicap Electrodes

    EXG sensor TP setup with Minicap electrodes The following is required to perform EEG measurements in an EXG sensor TP setup with minicap electrodes: Nexus-4, NeXus-10 or NeXus-32 EXG Sensor TP EXG Ground TP EEG Minicap Electrodes (sintered Ag/AgCl) Electro gel...
  • Page 51 Place the black TP connection (reference) with electrode of pair one and the ground with electrode on to an ear clip. Determine electrode positions according to the 10-20 system by using measuring tape and marking positions with a skin marker. Use the clip of the EXG TP cable to attach the EXG TP sensor to prevent pulling of the cables.
  • Page 52 Due to the fluid nature of electro gel, rubbing the skin with an abrasive gel is usually not necessary. When using electrode paste (e.g. Ten20), rub the skin with a cotton swab and Nuprep at all electrode positions. The location of the ground electrode is preferably near other electrodes on the scalp.

  • Page 53: Two Positions Eeg

    Two positions EEG Connect the EXG Sensor TP to input A&B of the NeXus-4 or NeXus-10 and input 25&26 of the NeXus-32. Make sure the red dot of the connector is facing downward (NeXus-4 or NeXus-10) or upward (NeXus-32). To create one reference for both positive electrodes, use the linked ear cable.
  • Page 54 Use the clip of the EXG TP cable to attach the EXG TP sensor to prevent pulling of the cables. Place the Minicap or Microcap on the head. Apply some Electro gel to the electrodes by using a cotton swab or a syringe with blunt needle.
  • Page 55 Place the ground electrode preferably near the other reference electrodes on the scalp. Use the Minicap or Microcap to fix the electrodes. Place the red (positive) electrodes on to the skin at the location of interest. Use the Minicap or Microcap to fix the electrode. The Minicap also allows for placing the electrodes on the mastoids instead of the ear.

  • Page 56: Four Positions Eeg

    Four positions EEG When measuring four positions EEG, a linked-ear setup is recommended. Connect the linked- ear cables to input A&B and C&D on the NeXus-10 and input 25&26 and 27&28 on the NeXus- 32. Make sure the red dot of the connector is facing downward (NeXus-10) or upward (NeXus- 32).
  • Page 57 Place Minicap electrodes on to the red EXG sensors TP and place a Minicap electrode on to the EXG ground TP. Slightly twist the connector in to EXG TP connection in order to make good connection. Place black Minicap electrodes on to the black electrodes of the EXG sensor TP which is connected to input A&B of the NeXus-10 and input 25&26 of the NeXus-32.
  • Page 58 Apply some Electro gel to the electrodes by using a cotton swab or a syringe with blunt needle. Due to the fluid nature of electro gel, rubbing the skin with an abrasive gel is usually not necessary. When using electrode paste (e.g. Ten20), rub the skin with a cotton swab and Nuprep at all electrode positions.
  • Page 59 Now go to chapter ‘BioTrace+’ for further instructions. Page 59 of 66...

  • Page 60: Exg Sensor Tp Setup With Cup Or Ring Electrodes

    EXG sensor TP setup with cup or ring electrodes The following is required to perform EEG measurements in an EXG sensor TP setup with cup or ring electrodes: Nexus-4, NeXus-10 or NeXus-32 EXG Sensor TP EXG Ground TP EEG cup or ring electrodes (Ag/AgCl) Nuprep Electrode paste (e.g.
  • Page 61 Rub the skin with a cotton swab and Nuprep at all electrode positions. Remove residual gel with a tissue. As an alternative to using Nuprep, alcohol pads are sometimes used. Use the clip of the EXG TP cable to attach the EXG TP sensor to prevent pulling of the cables. Apply some electrode paste (e.g.

  • Page 62: Two Positions Eeg

    Two positions EEG Connect the EXG Sensor TP to input A&B of the NeXus-4 or NeXus-10 and input 25&26 of the NeXus-32. Make sure the red dot of the connector is facing downward (NeXus-4 or NeXus-10) or upward (NeXus-32). To create one reference for both positive electrodes, use the linked ear cable.
  • Page 63 Use the clip of the EXG TP cable to attach the EXG TP sensor to prevent pulling of the cables. Apply some electrode paste (e.g. Ten20) to the electrodes by using for example a scoop. Place the black (reference) electrodes on to the left and right earlobe. Place the ground electrode preferably near the other reference electrodes on the scalp.

  • Page 64: Four Positions Eeg

    Four positions EEG When measuring four positions EEG, a linked-ear setup is recommended. Connect the linked- ear cables to input A&B and C&D on the NeXus-10 and input 25&26 and 27&28 on the NeXus- 32. Make sure the red dot of the connector is facing downward (NeXus-10) or upward (NeXus- 32).
  • Page 65 Place cup or ring electrodes on to the red EXG sensors TP and place a cup or ring electrode on to the EXG ground TP. Place cup or ring electrodes on to the black electrodes of the EXG sensor TP which is connected to input A&B of the NeXus-10 and input 25&26 of the NeXus-32.
  • Page 66 Place the black (reference) electrodes on to the left and right earlobe. Place the ground electrode preferably near the other reference electrodes on the scalp. Place the red (positive) electrodes on to the skin at the locations of interest. Now go to chapter ‘BioTrace+’ for further instructions. Page 66 of 66...

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