The pelvic portion of each sympathetic trunk is situated in front of the sacrum, medial to the anterior sacral foramina. It consists of four or five small sacral ganglia, connected together by interganglionic cords, and continuous above with the abdominal portion. Below, the two pelvic sympathetic trunks converge, and end on the front of the coccyx in a small<unk> , the<unk>  (or<unk>  of Walther).
Ganglion impar
Fibrous trigone
Crista terminalis
Malleus
Plexus
Bulbus cordis
Musculi pectinati
Squama temporalis