If I diagnose nerve compression or irritation, the treatment is removing the compression or irritation, whatever that is. Once that is removed, the nerve should move normally again. If I diagnose nerve restriction (or tightness), the treatment will include things such as nerve flossing, gliding, or mobilization to get the nerve moving normally again.
I make the diagnosis by repeatedly moving someone and assessing the effect on the nerve. (Compression either can or cannot change rapidly; tightness will not change rapidly.) They are very different phenomena, and of all the nerve-related problems I’ve seen, the large, large majority are compression/irritation problems.
A main problem I see in orthopedics is that clinicians diagnose nerves as tight when in fact they’re compressed. The analogy I always give is that you don’t want to pull on a hose when someone’s foot is on the hose. You want to get the foot off the hose. Effective care starts with correct diagnosing.
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