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The cervical paraspinal interfacial planes (PIPs) (A) and ultrasound guided cervical multifidus plane (CMP) block (B). CMP, cervical multifidus plane; CCeP, cervical semispinalis cervicis plane; CCaP, cervical semispinalis capitis plane; Green line, Ventral ramus nerve, dorsal ramus nerve and its branches; m, muscle; SP, spinal process. “Figure 1A” is originally from the article (6). Permission has obtained from the original publisher.
