click below
click below
Normal Size Small Size show me how
Artifacts
2
Question | Answer |
---|---|
Glossokinetic Potentials | Normal, Reproduced to verify (lalala). Mistaken for slow wave abnormal & FIRDA. Produced by the tongue just like eyes, except opposite polarity. Back of tongue is positive compared to the tip in frontal and temporal leads. Theta or Delta and about 75uV. |
What are 'O' waves? | Eye blinks or EC in infants that produce large slow wave responses. |
Breach Artifact | Localized, increased amplitude of high and low frequencies occurring over a skull defect such as that caused by craniotomy, burr hole, trauma, etc. Beta may appear quite sharp and mistaken for epileptiform activity. |
IV Drip Artifact | Rare. Looks like small sharp or spike and wave but precise timing like EKG and other artifacts of the like. |
Intraventricular Artifact | High amplitude sharps or spikes that resemble EKG in timing, but are usually generalized and can make a record unreadable. |
Roving EM | Slow wave EM only. |
Saccadic Lateral EMs | Lateral EM produce horizontal small frontal spikes. |
Asymmetric EM | Usually prosthetic eye or blindness on attenuated side. |
Feeding Pump Artifact | Circular occipital/temporal slow waves. |
Walking Artifact | Looks like the opposite of biphasic or triphasic waves. Occurs in the occipito-tempro-posterio head regions. |
Back Patting Artifact | Looks like electrode artifact. Rhythmic and sharp. |
Pulse Artifact | Slow waves that follow EKG and is commonly seen at the fontanelle in neonates. |