EDX

What is EDX?

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• EDX Includes NCS and EMG

What is NCS?

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• Nerve conduction study (NCS) is the test to check neuropathy, nerve damage or nerve disease; nerve entrapment or demyelinating changes. 

What is EMG?

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• Electromyography (EMG) to check nerve impingement that is radiculopathy; neuropathy that affects nerve axon; or muscle disease also called myopathy or myotonic dystrophy. 

What is the limitation of NCS?

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• Sometimes patient feels pain but EDX normal, suggest Postganglionic nerve damage, or at early stage the nerve damage is not severe enough to be checked out, or C-fiber neuropathy.

• Needs good skills and training to perform the test.

What is the limitation of EMG?

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• Surrounding machine interferences cause difficult wave reading. 

• Not only read waves but need good training to hear spontaneous waves.

• Need clinical correlation.