RT Book, Section A1 Tsui, Ban C. H. A1 Hadzic, Admir A2 Hadzic, Admir SR Print(0) ID 3498551 T1 Chapter 5. Peripheral Nerve Stimulators & Electrophysiology of Nerve Stimulation T2 NYSORA Textbook of Regional Anesthesia and Acute Pain Management YR 2007 FD 2007 PB The McGraw-Hill Companies PP New York, NY SN 9780071449069 LK accessanesthesiology.mhmedical.com/content.aspx?aid=3498551 RD 2024/03/29 AB Eliciting paresthesia or nerve stimulation are commonly used methods for localizing nerves prior to the injection of local anesthetic. Paresthesia is thought to result from mechanical stimulation of the nerve, resulting in a sensory feeling described as “an electric current” or “shock” in the sensory distribution of the nerve that is being touched. As such, paresthesia can indicate that the needle is in close proximity to the nerve and may be a warning sign of impending mechanical injury, should the needle be further advanced. In contrast, nerve stimulation techniques rely on the use of electric current to elicit motor stimulation of nerves and confirm the proximity of the needle to the nerve.