Cognionics CGX Mobile-128 Manuel - Sayfa 10

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Understanding Readings (20 Channels Shown For Clarity)

Muscle Artifact: Jaw Clench

Muscle Artifact: Tongue Movement

Muscle Artifact: Swallowing

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.

The tongue is a large

polarized muscle, with the

tongue's tip negative with

respect to the base of the

tongue. When the tongue

moves around the mouth,

it generates a moving field

causing recording disruptions.

Disruptions may be seen

down the midline (Fz, Cz, Pz).

Tongue movement during

talking can be seen on many

channels.

Swallowing invokes

movement of several muscles

in the mouth, including the

tongue, causing disruption

of many channels. Ignore

swallowing if infrequent, but

frequent swallowing may limit

usable data.