This nerve (N. glutæus cranialis) is derived chiefly from the last
lumbar and first sacral nerves. It divides into four or five branches
which emerge through the great sacro-sciatic foramen with the divisions
of the anterior gluteal artery and supply the gluteal and tensor fasciæ
latæ muscles. The nerve to the latter and the anterior part of the
superficial gluteus passes between the deep part of the gluteus medius
and the deep gluteal muscle, and is accompanied on the iliacus by
branches of the external circumflex vessels.