Chiropractic 101

What Surface EMG Measures

3 min read·Updated 2026-07-15·Clinically reviewed by Dr. Adrian B. Hunter, D.C.

A plain-language look at surface electromyography and what it reveals about muscle activity along the spine.

Surface EMG measures electrical activity in muscles along the spine. It provides a snapshot of how those muscles are working relative to one another.

It is one input among many. The value is in trending change over time as part of a broader evaluation.

This article is general education, not personal medical advice. If your symptoms include any red-flag signs, seek prompt medical evaluation.

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