Lecture Notes: Electrode Placement and Preparation

Overview

This lecture covers the proper technique for electrode placement on the head, including the preparation steps to ensure correct and reliable application.

Initial Setup

• Positioning: Ensure purple holes on apparatus are aligned with the ear holes.
• Marking Points: Use a tri-race marker to mark three key points on the scalp:
  • Center point
  • Two additional green points on either side

Electrode Application

Materials Needed

• Black electrode
• Paste
• Alcohol swabs
• Wooden dowels or pins

Steps for Application

1. Prepare the Electrode:

   • Hold electrode between fingers.
   • Apply a pea-sized amount of paste using a wooden pin.

2. Scalp Preparation:

   • Use alcohol swab to clean the marked area on the scalp.
   • Ensure scalp is fully exposed by parting the hair.

3. Placing the Electrode:

   • Use fingers to hold hair aside.
   • Set electrode on cleaned spot, pushing down until paste appears through the hole.
   • Secure the electrode by running the wire backward off the head, ensuring it's settled.

4. Repeat Process:

   • Follow the same steps for blue electrodes with white tips on each side of the head.
   • Ensure the electrode wires (blue and black) are properly routed.

Ear Clip Placement

• Preparation:

  • Use paste on both sides of the ear electrodes.

• Application:

  • Expose the ear, avoiding hair tangles.
  • Clip electrode onto the ear, ensuring a snug fit.

Cable Management

• Cable Order: Organize cables by color and purpose:
  • Channel one: Blue cable
  • Ground: Black cable
  • Channel two: Blue cable (right side)
  • Reference: White cable

Final Steps

• Removal: Part hair and gently remove electrodes and paste using an alcohol swab.

• Conclusion: Ensure all electrodes are removed cleanly, and cables are properly grouped for the next use.