In the TG and DRG, some BSI B 4 labeled cells which give off C fibers also showed SP , CGRP , PAG , and NOS LI. Among those double labeled cells, the number of PAG/BSI B 4 double labeled cells was the most numerous.

• TG和DRG内可见BSI－B4标记并呈SP样、CGRP样、PAG样或NOS样阳性的双标细胞，其中PAG/BSI－B4双标细胞的数量最多。