The Pain Source

Electrode placement (use the bar electrode)

14-cm distance (around the medial malleolus)

• E1 (black):  Posterior and superior to the medial malleolus
• E2 (red):  Proximal
• Ground:  Medial ankle (between stimulation and pickup)

Stimulation sites

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Related Content:

• Setup – Tibial Motor NCS
• Setup – Sural Sensory NCS
• Setup – Radial Motor NCS
• Setup – Ulnar Motor NCS
• Setup – Median Sensory NCS

aka “medial plantar motor”

Stimulate 8-cm proximal to E1 (curved line around medial malleolus)

Electrode placement (use the bar electrode)

• E1 (black):  Abductor hallucis brevis (AHB) muscle (drop off the navicular bone and go 1-cm proximal)
• E2 (red):  Distally along the long axis of the foot
• Ground:  Medial ankle (between stimulation and pickup)

Stimulation sites

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Related Content:

• Setup – Radial Motor NCS
• Setup – Ulnar Motor NCS
• Setup – Medial and Lateral Plantar NCS
• Setup – Sural Sensory NCS
• Setup – Median Motor NCS

Electrode placement (use the bar electrode)

14-cm distance (black to black)

• E1 (black):  Behind the lateral malleolus
• E2 (red):  Distally
• Ground:  Lateral leg (between stimulation and pickup sites)

Stimulation site

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Related Content:

• Setup – Tibial Motor NCS
• Setup – Radial Motor NCS
• Setup – Ulnar Motor NCS
• Setup – Medial and Lateral Plantar NCS
• Setup – Median Motor NCS

Electrode placement (use the bar electrode)

Stimulate 4-5cm proximal to E1

• E1 (black):  Extensor indicis proprius (EIP) muscle (about 2-3 finger widths proximal to the ulnar styloid process on dorsal forearm)
• E2 (red):  Distally along the distal forearm
• Ground:  Dorsum of forearm (between stimulation and pickup sites)

Stimulation sites

• Continue Reading

Related Content:

• Setup – Tibial Motor NCS
• Setup – Ulnar Motor NCS
• Setup – Sural Sensory NCS
• Setup – Median Motor NCS
• Setup – Medial and Lateral Plantar NCS

Electrode placement (use the bar electrode)

8-cm distance (black to black)

• E1 (black):  Abductor digiti minimi (ADM) muscle (medial side of the hypothenar eminence)
• E2 (red):  Distally along the little finger
• Ground:  Dorsum of hand

Stimulation sites

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Related Content:

• Setup – Tibial Motor NCS
• Setup – Radial Motor NCS
• Setup – Sural Sensory NCS
• Setup – Median Motor NCS
• Setup – Medial and Lateral Plantar NCS

Electrode placement (use the bar electrode)

8-cm distance (black to black)

• E1 (black):  Abductor pollicis brevis (APB) muscle (laterally on the thenar eminence)
• E2 (red):  Distally along the thumb
• Ground:  Dorsum of hand

Stimulation site

• Continue Reading

Related Content:

• Setup – Tibial Motor NCS
• Setup – Radial Motor NCS
• Setup – Ulnar Motor NCS
• Setup – Median Sensory NCS
• Setup – Sural Sensory NCS

Electrode placement (use the BAR electrode)

8-cm distance (black to black)

• Two sites
  • Median nerve site
    • E1 (black):  Along the middle of the forearm (in line with the median nerve)
    • E2 (red):  3-4cm proximal to E1.
  • Ulnar nerve site
    • E1 (black):  Along the medial forearm (in line with the ulnar nerve)
    • E2 (red):  3-4cm proximal to E1.
• Ground:  Dorsum of hand (for both)

Stimulation site

• Continue Reading

Related Content:

• Setup – Split Ring Median-Ulnar Sensory NCS
• Setup – Numb Thumb Median-Radial Sensory NCS
• Combined Sensory Index (CSI) – Explained
• Carpal Tunnel Syndrome – Electrodiagnostics
• Setup – Ulnar Motor NCS

Electrode placement (use the ring electrodes)

14-cm distance (black to black)

• E1 (black):  Around the proximal interphalangeal (PIP) joint of the ring finger
• E2 (red):  3-4cm distally from E1.
• Ground:  Dorsum of hand

Stimulation site

• Continue Reading

Related Content:

• Setup – P8 Median-Ulnar Sensory NCS
• Setup – Numb Thumb Median-Radial Sensory NCS
• Combined Sensory Index (CSI) – Explained
• Carpal Tunnel Syndrome – Electrodiagnostics
• Setup – Ulnar Motor NCS

Electrode placement (use the ring electrodes)

10-cm distance (black to black)

• E1 (black):  Base of thumb
• E2 (red):  3-4cm distally from E1.
• Ground:  Dorsum of hand

Stimulation site

• Continue Reading

Related Content:

• Setup – P8 Median-Ulnar Sensory NCS
• Setup – Split Ring Median-Ulnar Sensory NCS
• Carpal Tunnel Syndrome – Electrodiagnostics
• Setup – Radial Motor NCS
• Setup – Median Motor NCS

Electrode placement (use the ring electrodes)

14-cm distance (black to black)

• E1 (black):  Proximal phalanx of the index finger — want to keep away from the metacarpophalangeal (MCP) joint skin, as this may pick up motor conduction artifact.
• E2 (red):  3-4cm distally from E1.
• Ground:  Dorsum of hand

Stimulation site

• Continue Reading

Related Content:

• Setup – Median Motor NCS
• Setup – Medial and Lateral Plantar NCS
• Setup – Tibial Motor NCS
• Setup – Sural Sensory NCS
• Setup – Radial Motor NCS