ACNS Terminology

Question 1

≥1/10s

Answer 1

Abundant

Question 2

≥1/min-1/10s

Answer 2

Frequent

Question 3

≥1/h-1/min

Answer 3

Occasional

Question 4

<1/h

Answer 4

rare

Question 5

G

Answer 5

Generalized

Question 6

L

Answer 6

lateralized

Question 7

BI

Answer 7

Bilateral Independent

Question 8

Mf

Answer 8

Multifocal

Question 9

Ui

Answer 9

Unilateral Independent

Question 10

PDs

Answer 10

Periodic Discharges

Question 11

RDA

Answer 11

Rhythmic Delta Activity

Question 12

SW

Answer 12

(Poly)Spike and Wave/Sharp and wave

Question 13

refers to the rate per second or the number of cycles of a pattern within 1 second. Maximum, minimum, and typical frequencies can be recorded. Frequencies are expressed in hertz (Hz) that equates with cycles per second.

Answer 13

Frequency

Question 14

refers to the typical duration of a single occurrence of the pattern, regardless of whether the pattern occurs rarely or frequently,

Answer 14

Duration

Question 15

refers to percent of the entire record occupied by a pattern

Answer 15

Prevalence

Question 16

refers to how often sporadic (non-periodic) epileptiform discharges are present in the record

Answer 16

Quantification of Sporadic epileptiform discharges

Question 17

+F

Answer 17

Superimposed fast activity

Question 18

+R

Answer 18

Superimposed rhythmic or quasi rhythmic delta activity

Question 19

+S

Answer 19

Superimposed sharpwaves/spikes

Question 20

+FR

Answer 20

if both subtypes apply

Question 21

+FS

Answer 21

If both subtypes apply