Read Basmajian and De Luca's Chapter 2 - Apparatus, Detection and Recording Techniques and answer the following question.

1. Briefly explain what the bandwidth of a band-pass filter is.

2. Given what you know about electrodes, does our lab use active or passive electrodes? What makes you say this?

3. What is EMG cross-talk?

4. What liquid should surface electrodes be cleansed with? What liquids are not to be used when cleanuing surface electrodes?

5. Explain the relationship between common mode rejection and differential amplifiers.

6. Why are bipolar surface electrodes arranged parallel to the muscle fibers?

7. When using surface electrodes what is the recommended spacing between the detecting surfaces? Why is it important to consider interdection-surface spacing?

8. Please take a shot at briefly explaining the concept of either pass frequency or cancellation frequency.

9. Why is the wearing of polyester not recommended for subjects about to undergo electromyographic testing?

10. What is "motion artifact" and why does it occur?

11. When collecting EMG data, what is the most important factor to be considered?

12. What is the Nyquist frequency?

13. Briefly explain how biological tissue acts as a low pass filter of neuromuscular activation signals.

14. If De Luca recommends using a bandwidth of 20-500 Hz for surface electrodes, what should the Nyquist frequency be set at?

15. What does De Luca mean when he uses the term "innervation zone"

Bonus question - On what page is the word "lazy" used?