Lower Limb EMG

Question 1

SENSORY

SUPERFICIAL PERONEAL

Active Electrode

Answer 1

1 finger breadth medial to lateral malleolus

Question 2

SENSORY

SUPERFICIAL PERONEAL

Reference Electrode

Answer 2

3 cm distal to active NOT over EDB

Question 3

SENSORY

SUPERFICIAL PERONEAL

Stimulation

Answer 3

12 cm proximal to active (anterior and lateral surface of leg)

Question 4

SENSORY

SURAL

Active Electrode

Answer 4

1 cm lateral to lateral malleolus
Parallel to sole of foot

Question 5

SENSORY

SURAL

Reference

Answer 5

3 cm distal to active
parallel to sole of foot

Question 6

SENSORY

SURAL

Stimulation

Answer 6

10 cm proximal to active on the Achilles
Then work laterally

Question 7

MOTOR

Common peroneal

Active

Answer 7

Center of extensor digitorum profundus

Question 8

MOTOR

Common peroneal

Reference

Answer 8

5th toe

Question 9

MOTOR

Common peroneal

Stimulation points (3)

What direction do you want ankle?

Answer 9

8 cm proximal to EDB on lateral surface of foot

Below fibular head

Popliteal: 10 cm proximal from fibular

Want ankle to go UP

Question 10

MOTOR

Tibial

Active Electrode

Answer 10

Feel navicular
1 fingerbreadth towards plantar surface
1 fingerbreadth posterior

Question 11

MOTOR

Tibial

Reference Electrode

Answer 11

Medial surface of great toe at the joint

Question 12

MOTOR

Tibial

Stimulation points (2)

Want ankle to go

Answer 12

8 cm proximal to active, posterior to medial malleolus

In popliteal fossa, slightly lateral to midlline

Want ankle to go DOWN

Question 13

H-reflex active

Answer 13

over medial gastroc

Question 14

H-reflex reference

Answer 14

Achilles

Question 15

H-reflex stimulation

Answer 15

Pop fossa (lateral to midline)