The influence of transcutaneous electrical neurostimulation (TENS) on human cerebral blood flow velocities.

Acta Neurochir (Wien) · 2010 · PMC2901492 · PMID 20473532

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did not reach statistical significanceno p-value reported

The fall in MCA blood flow velocity as a result of hyperventilation was a little less prominent when TENS was applied, but this did not reach statistical significance.

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