Artifact produced by the electrical activity of the heart.

• EEG

• EKG

• ERG

• EMG

Identify this artifact.

Answer explanation

EKG

Resembles: sharp wave, familiar morphology

Remove/eliminate: unable, change head position

Prove: EKG channel

Tags

NGSS.HS-PS2-5

Identify this artifact.

Answer explanation

Pulse

Resembles: slow wave, any channel

Remove/eliminate: unable, change head position

Prove: EKG channel

Identify this artifact.

Answer explanation

Pulse

Resembles: slow wave, any channel

Remove/eliminate: unable, change head position

Prove: EKG channel

Slow wave artifact that can occur when an EEG electrode is placed over a pulsating vessel.

• Pulse

• Sweat

• Eyelid fluttering

• EMG

Cardiac related artifact, but non-physiological

• EKG

• ERG

• Pulse

• Pacemaker

Identify this artifact.

Answer explanation

Pacemaker

Resembles: Fast spike

Remove/eliminate: unable

Prove: EKG channel

Tags

NGSS.HS-ETS1-3

Simulates an EEG slow wave having frontal origin

• ERG

• Pulse

• Eye movement

• Tongue movement

Identify this artifact.

Answer explanation

Eye movement

Resembles: frontal slow wave

Remove/eliminate: unable

Prove: eye lead(s)

Tags

NGSS.MS-LS1-8

Gently holding the eyelids closed may reduce or prove this artifact.

• Eyelid fluttering

• Head scratching

• Pulse

• Chewing