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Table 1 Nerve conduction velocity study of the patient

From: Chronic inflammatory demyelinating polyneuropathy with hypoglossal nerve involvement and inverted Beevor’s sign: case report

Nerves

Left

Right

Motor nerve

MCV (m/s)

CMAP (mV)

Distal latency (ms)

MCV (m/s)

CMAP (mV)

Distal latency (ms)

Median nerve

 Wrist-APB

no response

no response

Ulnar nerve

 Wrist-ADM

 

3.7

2.6

 

7.8

2.6

 Below elbow-Wrist

42.9

1.2

 

50.4

5.9

 

 Above elbow-Below elbow

no response

no response

Radial nerve

 Elbow-EDC

 

5.0

3.1

 

8.9

2.8

 Axilla-Elbow

58.8

1.6

 

64.5

3.6

 

Peroneal nerve

 Ankle-EDB

no response

no response

 CF-Down-2 cm-Tibialis anterior muscle

 

6.2

4.1

 

5.3

2.8

 CF-Up-9 cm-CF-Down 2 cm

34.7

3.7

 

42.0

3.0

 

Tibial nerve

 Ankle- Abd hal

 

3.6

6.0

 

2.8

4.3

 Popliteal fossa-Ankle

56.1

1.0

 

47.9

1.7

 

Sensory nerve

SCV (m/s)

SNAP (μV)

Distal latency (ms)

SCV (m/s)

SNAP (μV)

Distal latency (ms)

Median nerve

38.9

2.0

4.1

no response

Ulnar nerve

38.1

2.2

2.9

no response

Radial nerve

42.9

4.7

1.8

54.5

6.1

1.7

Sural nerve

After biopsy

61.8

14

1.7

Posterior tibial nerve

no response

no response

F wave conduction velocity

44 m/s(Ulnar nerve); Occurrence rate of 5%

  1. Abbreviations: MCV Motor conduction velocity, CMAP Compound motor action potential, SCV Sensory conduction velocity, SNAP Sensory nerve action potential, APB Abductor pollicis brevis, ADM Abductor digiti minimi, EDC Extensor digitorum communis, EDB Extensor digitorum brevis, CF Capitulum fibula, Abd hal Abductor hallucis