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Figure 4: Diagram illustrating the intercostal nerve and its branches. Blue arrow shows the plane for local anesthetic injection in erector spinae block. EIM, external intercostal muscle; IIM, internal intercostal muscle; INIM, innermost intercostal muscle

Figure 4: Diagram illustrating the intercostal nerve and its branches. Blue arrow shows the plane for local anesthetic injection in erector spinae block. EIM, external intercostal muscle; IIM, internal intercostal muscle; INIM, innermost intercostal muscle