Lab 8- Muscle and EMG

Question 1

What does an EMG record?

Answer 1

Electrical activity of innervated muscle fibres

Question 2

Why should you clean the areas and lightly abrade?

Answer 2

It reduces the electrical resistance of the skin

Question 3

Steps in preparing for electrode attachment

Answer 3

1. Remove jewellery
2. Connect Bio-Amp to PowerLab
3. Connect wires to Bio-Amp cable
4. Ensure PowerLab is connected to computer and turned on
5. Attach green wire to Dry Earth Strap
6. Attach Dry Earth strap to wrist
7. Mark 2 crosses on bicep, 2 on tricep

Question 4

Steps in attaching electrodes

Answer 4

1. Apply pea-sized amount of NuPrep gel to gauze swab and lightly abrade crosses
2. Attach electrode to wires
3. Place electrodes on crosses
4. Ensure everything is properly connected