II C recording strategies Flashcards by Karyn Johnson | Brainscape

Q

voltage

A

referential recording

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Q

phase reversal

A

circumferential bipolar

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Q

source reference derivation

A

Laplacian

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Q

referential recording

A

voltage

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Q

circumferential bipolar

A

localize occipital spikes by

phase reversal

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Q

14 -6 Hz positive spikes

A

contralateral
ear
reference

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Q

left temporal spike

A

left temporal to

contralateral ear

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Q

Cz reference best choice

A

suspected temporal lobe epilepsy

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Q

enhance a waveform of .5 Hz

A

LF .3 Hz

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Q

Cz reference best choice

A

excessive temporal myogenic activity

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Q

shorten time constant

increase sensitivity

A

enhance background alpha/beta with

high voltage delta

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Q

muscle artifact may resemble beta

A

when lowering the HF

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Q

reduce sweat artifact with low voltage activity

A

sens: 5 uv/mm
HF: 70 Hz
LF: 5 Hz

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Q

enhance background alpha/beta and high voltage delta

A

shorten time constant

increase sensitivity

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Q

enhance cortical slowing

A

change LFF 1 Hz to .1 Hz

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Q

enhance a slow wave focus

A

LF .3 Hz (“big open filter”)

paper speed of 15 mm/sec (slow)