Electrodes and Montages

Don't electrocute the patient, please

What is shown in a bipolar channel?

The difference in charge between 2 sequential electrodes

What is shown in a referential channel?

The difference between one electrode and a single reference electrode

What’s the charge of this wave?

Negative

What’s the charge of this wave?

Positive

What is this phenomenon on a bipolar montage called?

A Phase Reversal

Which electrode is this event centered on?

C3

Which electrode is this spike centered on in this referential montage?

F3

What is the charge of this Phase Reversal?

Negative

What is the charge of this Phase Reversal?

Positive

What is this arrangement of electrodes called? (assume the montage is bipolar)

Longitudinal Bipolar (LB)

What is this arrangement of electrodes called? (assume the montage is bipolar)

Transverse Bipolar (TB)

What is this arrangement of electrodes called?

Circumferential

What are some places for a reference electrode?

The earlobe, the mastoid process of the skull, the nose, etc.

Do referential montages technically need a reference electrode to be placed?

No, they can use an average of some or all of the other electrodes

What does a high filter (HF) do?

Reduces the amplitude of waves over a set frequency

What does a low filter (LF) do?

Reduces the amplitude of waves under a set frequency

What is the targeted frequency in a Notch Filter (in the USA)?

60 Hz