Cognionics CGX Mobile-128 Handbuch - Seite 8

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Obtaining Clean EEG Data

The most important aspect of EEG recording is that

output data is only as good as the recording input. While

algorithms exist to remove artifacts, poorly recorded data

cannot be fixed in post processing.

Recording good EEG data requires preparation of the

participant for optimal sensor contact:

1. Participants should have their hair recently washed

and fully dried before recording. Wet hair, hair gel,

conditioners, and hair spray may cause interference and

degrade signal quality.

2. Clean each sensor location on the head with a cotton

swab soaked with alcohol.

3. In the event of difficulty establishing good contact, apply

a small amount of water between the sensor and scalp

to create an electrical bridge.

4. It is important for subjects to reduce tension in the

head, neck, and shoulders during readings.

Typical Clean Data Recording

Mobile-128 sensor locations

lie within 1.0 centimeters on

the vast majority of hand-

measured 10-5 placements

on heads sized from 52-62

centimeters.

This is a representation of a

clean data recording.