Anesthetic regions of group 1 are V1, V2, V3, C2, C3, C4, C5, - C6; Group 2: V1, V2, V3, C2, C3, C4, C5, - C6; Group 3: V1, V2, V3, C2, C3, C4, C5, C6, - C7; Areas markedly affected the most in group 1 are V1, V2, C2-C3; in group 2: V2, V3, C3-C4; in group 3: V3, C3-C5; The rate of markedly increased pain threshold (2-fold higher after intervention) at V1 in group 1 is 76.7% on the right side and 66.7% on the left.