Lesson 7.3- Quiz

Which montage in the illustration above does not conform to the guidelines for montage design (anterior before posterior and logical sequence) set by the American Clinical Neurophysiology Association? ________

A, C, E are not anterior to posterior montage designs, C and D are also not in a logical sequence

If a patient has a spike focus at C3, which channels in the Transverse montage (the one in the illustration on the left side) would show a phase reversal?

2 and 3, 9 and 10

In a patient, with the spike focus at C3, which channels would show a phase reversal, using the longitudinal bipolar montage, on the right?

6 and 7

(T/F) The method of localization used in Bipolar Montages is primarily phase reversal and occasionally cancellation.

True

In the above illustration, which is the best Transverse Montage?

B

In the illustration below, the Longitudinal Bipolar Montage is

E

In the illustration, which montage illustrates the best Circumferential Bipolar?

F

If any of the montages in the illustration is poorly designed according to ACNS guidelines. Why are these montage poorly designed?

a.It is not arranged in an anterior to posterior fashion. b.It does not comply with the rule (in the US) that montages be ordered from left to right. It begins Left to Right, then becomes right over left in Channels 14 and 15. c.It does not follow a logical sequence.

The localization method used in referential montages is _____.

area of greatest amplitude

A characteristic of common mode rejection that makes it sometimes difficult to localize a focus when 2 channels record the focus with the same amplitude and same timing is called _______.

cancellation