The posterior division of the coccygeal nerve does not divide into a medial and a lateral branch, but receives a communicating branch from the last sacral; it is distributed to the skin over the back of the coccyx.
This article incorporates text from a public domain edition of Gray's Anatomy.
anat (h/r/t/c/b/l/s/a)/phys (r)/devp/prot/nttr/nttm/ntrp
noco/auto/cong/tumr, sysi/epon, injr
proc, drug (N1B)