MODULE IV. TEMINOLOGY A.2: EPILEPTIFORM

Question 1

What is the delta frequency band?

Answer 1

0.5 - 3.5 Hz

Question 2

What is the theta frequency band

Answer 2

3.5 - 7.5

Question 3

What is the alpha frequency band?

Answer 3

8 - 13 Hz

Question 4

What is the beta frequency band?

Answer 4

13.5 - 30 Hz

Question 5

What is the gamma frequency band?

Answer 5

30 - 200 Hz

Question 6

Which frequency band is found normally in deep sleep

Answer 6

Delta frequency

Question 7

What frequency band do we most likely see the lighter sleep stages of stages 1 and 2

Answer 7

Theta

Question 8

What region of the brain are the alpha frequency bands most often seen?

Answer 8

In the occipital region

Question 9

When patient is relaxed awake, relaxed with eyes closed which frequency band is generally derived?

Answer 9

The Alpha ranges

Question 10

Which frequencies are derived when the patient is in heavy concentration or when on benzodiazepines?

Answer 10

Beta waves

Question 11

What is the conversion formula for frequency?

Answer 11

1/duration

Question 12

What is the conversion formula for duration?

Answer 12

1/frequency

Question 13

What is the unit of measurement for the frequency bands

Answer 13

The unit of measurement is the Hz (Hertz)

Question 14

What is frequency in EEG?

Answer 14

Frequency is the number of wave cycles per second or Hertz (Hz)

Question 15

What is “duration” in EEG?

Answer 15

Duration is the time that an activity or wave persists and it’s measured in seconds

Question 16

what is Bell’s phenomenon?

Answer 16

blinking of the eye where the eyeball moves upward in the head and resulting in an electric charge that is able to be represented in a wave pattern/format

Question 17

what stage of sleep of sleep do sleep spindles occur and at what frequency range?

Answer 17

stage 2 of sleep and 11 - 15 Hz

Question 18

what are measures that can be taken (or inherent measures) to minimize the influence of common mode signals?

Answer 18

differential amplification, balanced electrode placement, grounding techniques, shielding

Question 19

what is balanced electrode placement?

Answer 19

positioning electrodes symmetrically around the head per 20/20 requirements

Question 20

what are electrode grounding techniques?

Answer 20

placement of ground electrodes to minimize common mode interference

Question 21

what is shielding?

Answer 21

the use of conductive materials or Faraday cages to block/redirect unwanted electrical fields.