Ep Training Course_webinar 1 Notes

7/31/2019 Ep Training Course_webinar 1 Notes

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Webinar 1 EPTraining

Course

NEXUS TEST PREP

& TRAINING


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ELECTRODE PLACEMENT SYSTEM

OBJECTIVES:

At the end of this module the student must be able to:

Demonstrate proper measurement of EEG

electrode sites according to the International10-20 system


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LESSON 1: EEG ELECTRODE PLACEMENT

M1

M2

Summary of the International 10-20 Electrode Placement


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The EEG records the electrical activity of the brain. Thedifferent brain wave activities identify the specific stageof sleep.

Correct EEG electrode placement is important to ensureproper location of electrodes in relation to cortical areasso that they can be reliably and precisely maintainedfrom individual to individual.

In order to get the exact placement of any EEGelectrode, there must always be a cross-section of twointersecting marks.

The next slides will be a step by step guide on how theEEG electrodes are attached on the scalp of the patientusing the International 10-20 Electrode Placement


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PROCEDURE:

1. Take measuring tape and

use the centimeter side.Start from the "0" mark(cm side).Measure from the Nasion(bridge of the nose) to the

Inion (occipitalpretuberance - if you runyour finger up the back ofthe neck of the skull, youwill encounter adepression with the ridgeof the protruding inion justabove it).


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PROCEDURE: (contd)

Mark the Nasion and

Inion. (As a rule of the

thumb, whichever

direction the numbers are

facing on the measuringtape is the direction you

should make your

marking). Get your total

(for teaching purposes,let us say it is 36 cm).


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PROCEDURE: (contd)

2. Mark 50% of your total

(i.e. 18 cm).

This is your first mark of

CZ.


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PROCEDURE: (contd)

3. Mark 10% up from the

nasion and 10% up from

the inion. (i.e. 3.6 cm)

This is your first mark of

FPZ and OZ.

FPZ

oz


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PROCEDURE: (contd)

4. Mark 20% up from either

the first mark of FPZ or

CZ. (i.e. 7.2 cm)

This will be your first

mark of FZ.

FPZ


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PROCEDURE: (contd)

5. Measure from pre-

auricular point to pre-auricular point. Have thepatient open his mouthslightly. Lightly run yourfinger up and down just

anterior to the ear; theindentation above thezygomatic notch is easilyidentified. Obtain yourtotal. (i.e. 38cm)


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PROCEDURE: (contd)

Mark half of your total(this number should

intersect with your first

50% mark). (ex. 19 cm)

This is your true CZ


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PROCEDURE: (contd)

6. Mark 10% up from each

pre-auricular point. (ex.

3.8 cm) These are your

first marks of T3, and T4.


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PROCEDURE: (contd)

7. Measure from your first

mark of T3 to your CZand obtain your total. (ex.15 cm)

Mark half of your total.(ex. 7.5 cm)This is your first mark ofC3.


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PROCEDURE: (contd)

8. Measure from your first

mark of T4 to your CZand obtain your total. (ex.15 cm)

Mark half of your total.(ex. 7.5 cm)This is your first mark ofC4.


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PROCEDURE: (contd)

9. Draw a cross-section on

your first mark of FPZ.

This is your true FPZ

mark.

FPZ


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PROCEDURE: (contd)

10. Encircle the measuring

tape all across your 10%

mark; obtaining your

circumference total. (ex.

56 cm)Mark half of your total.

(ex. 28 cm)

This will be your true

mark of OZ. OZ


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PROCEDURE: (contd)

11. Mark 5% (ex. 2.8 cm) of

the half to the left and

right of OZ.

These will be your true

marks of O1 and O2respectively.

OZ


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PROCEDURE: (contd)

12. Mark 5% (ex. 2.8 cm) to

the left and right of FPZ.

These will be your true

marks of FP1 and FP2

respectively.

FPZ


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PROCEDURE: (contd)

13. Mark 10% further down

from FP1 and FP2.

(ex. 5.6 cm)

These will be your marks

for F7 and F8respectively.


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PROCEDURE: (contd)

14. Measure from F7 to F8

and obtain your total. (ex.

32 cm)

Mark half of your total.(ex. 16 cm).

Where your first mark of

FZ and this second mark

of FZ intersect is yourtrue mark of FZ.


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PROCEDURE: (contd)

15. Measure from F7 to FZ.

Obtain your total. (ex. 16

cm)

Mark half. (ex. 8 cm)This will be your first

mark of F3.


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PROCEDURE: (contd)

16. Measure from F8 to FZ.

Obtain your total. (ex. 16

cm)

Mark half. (ex. 8 cm)This will be your first

mark of F4.


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PROCEDURE: (contd)

17. Measure 20% from FP1

to F3. (ex. 7 cm)

This will be your final

mark of F3.


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PROCEDURE: (contd)

18. Measure 20% from FP2

to F4. (ex 7 cm)

This will be your final

mark of F4.


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PROCEDURE: (contd)

19. Measure from FP1 to

your first mark of C3 toyour O1. Obtain yourtotal. (ex. 28 cm)

Mark half of your total.(ex 14 cm)Where your first andsecond marks intersect

will be your trueplacement of C3


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PROCEDURE: (contd)

20. Measure from FP2 to

your first mark of C4 toyour O2. Obtain yourtotal. (ex. 28 cm)

Mark half of your total.(ex 14 cm)Where your first andsecond marks intersect

will be your trueplacement of C4


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OVERVIEW:

1) Measure Nasion to Inion. Get total.

2) Mark 50% from the total. This is your initial mark forCZ.

3) Mark 10% up from the Nasion and Inion. Initial mark of

FPZ and OZ.4) Mark 20% from FPZ or CZ. Initial mark of FZ.

5) Measure from Pre-auricular point to pre-auricular point.Get the total. Mark 50%. Where line will intersect with

initial CZ, this is the FINAL mark of CZ


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OVERVIEW: (contd)

6) Mark 10% up from each pre-auricular point. This is yourT3, T4

7) Measure from first mark of T3 to your CZ. Obtain total.

Mark half. This is your first mark of C3.

8) Measure from first mark of T4 to CZ. Obtain total. Markhalf. First mark of C4.

9) Draw a cross-section across FPZ. This is your FINAL

FPZ mark.


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OVERVIEW: (contd)

10) Measure entire circumference of head, going all across

10% marks, starting from FPZ. Get total. Mark half.TRUE mark of OZ.

11) Mark 5% of the half to the left and right of OZ.These will be your TRUE marks of O1 and O2.

12) Mark 5% of the half to the left and right of FPZ. Truemarks of FP1 and FP2.13) Mark 10% further down from FP1 and FP2.

Your marks for F7 and F8.


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OVERVIEW: (contd)

14) Measure from F7 to F8 and obtain your total. Mark half.

Where your first and second marks of FZ intersect is

your FINAL mark of FZ.

15) Measure from F7 to FZ. Obtain total. Mark half. This

will be your first mark of F3.16) Measure from F8 to FZ. Obtain total. Mark half. First

mark of F4.

17) Measure 20% from FP1 to F3. This will be your final

mark of F3.


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OVERVIEW: (contd)

18) Measure 20% from FP2 to F4. Final mark of F4.

19) Measure from FP1 to first mark of C3 to O1.Obtain total. Mark half. Where your first and

second marks intersect will be your TRUE C3.

20) Measure from FP2 to first mark of C4 to O2. Obtain

total. Mark half. Where first and second marks

intersect will be your true placement of C4.

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Ep Training Course_webinar 1 Notes