Your PowerLab

Question 1

The Isolated Stimulator passes a pulse of current through the volunteer’s skin (for example, to make a muscle twitch). A green light indicates that the stimulator is delivering a pulse. What would it mean if the OOC light flashes yellow?

Answer 1

The current is not owing properly.

Question 2

The switch turns the Isolated Stimulator on and o. Can you connect stimulating electrodes to yourself?

Answer 2

Yes

Question 3

electrical signals can be recorded with the Bio Amp

Answer 3

ECG
EEG
EMG

Question 4

What signal does the pulse transducer “transduce” into an electrical signal?

Answer 4

The changes in pressure from pulsatile blood ow in the arteries.

Question 5

The Pulse channel shows the __________ signal which is coming directly from your volunteer’s nger.

Answer 5

raw data

Question 6

The Heart rate channel has a _________ applied to it, so the signal you see is calculated based on the raw data.

Answer 6

channel calculation

Question 7

Which data analysis tools are most appropriate to use in the following cases?

Calculate the change in values between two points

Answer 7

Marker and point selector

Question 8

Which data analysis tools are most appropriate to use in the following cases?

Calculate an average value over time

Answer 8

Region selector

Question 9

Based on what you have seen today, why do you think it would be advisable to record the heart rate for 60 seconds rather than for a shorter duration (for example, 15 or 30 seconds)?

Answer 9

This is to get a more stable and more accurate source of heartbeat information.

Question 10

Why would there be a lag between the raw data signal and the channel calculation signal that you see on screen?

Answer 10

the computer takes its time computing