EMG

Question 1

What information does EMG provide?

Answer 1

Real-time information, focal irritation detection of nerve roots

Question 2

How many levels above and below the surgery site should be recorded?

Answer 2

2 levels

Question 3

What are upper motor neurons?

Answer 3

Pyramidal cells that connect cerebral motor cortex w/ lower motor neuron in spinal cord.

Question 4

What are lower motor neurons?

Answer 4

Connects upper motor neurons with muscle fibers.

Question 5

What are slow eeg signals?

Answer 5

Delta, Theta

Question 6

What are the fast EEG signals?

Answer 6

Alpha, Beta

Question 7

What is the frequency for delta waves

Answer 7

0 - 4 Hz

Question 8

When are delta waves present and not present?

Answer 8

Alert individuals - not present, Stage 3 and stage 4 sleep - present.

Question 9

What can be determined if delta waves are present in an awake patient?

Answer 9

Could be a pathological problem

Question 10

What is the frequency for theta waves?

Answer 10

4 - 8 Hz

Question 11

When are theta waves present?

Answer 11

During drowsiness

Question 12

What can be determined if theta waves are present in an awake patient?

Answer 12

Could be a pathological problem

Question 13

What is the frequency of alpha waves?

Answer 13

8 - 12 Hz

Question 14

Where can alpha waves be seen?

Answer 14

Occipital lobe

Question 15

What is the frequency of beta waves?

Answer 15

12 - 30 Hz

Question 16

When are alpha waves prominent?

Answer 16

When eyes are closed

Question 17

When are beta waves prominent?

Answer 17

When eyes are open

Question 18

When are beta waves present?

Answer 18

When they are awake and alert

Question 19

Where are beta waves formed?

Answer 19

Frontal lobe