The Lugwerd's ganglion (lat. ganglion lumborum) is a nerve ganglion in the upper part of the sacrum that connects the lumbar and sacral regions of the spine and the pelvic floor muscles. This ganglion is an important nerve structure that helps maintain the functioning of the pelvic canal and its associated organs. The Lygwerd's ganglia are located paravertebrally between the L1 and S2 vertebrae. Their size can vary depending on genetic and sexual factors, but they are usually found under the skin and can be as large as the head of a pin. The Lygwerd's ganglion has three functions: sensory, motor and secretory. The sensory function of the ganglion is to transmit pain signals