Nerves of the Buttocks Lower

***Nerves of the buttocks lower***. Posterior superior spinous processes of the fifth lumbar and first sacral vertebrae, intersecting with the transverse processes of the same vertebrae. They merge into one common trunk, which emerges from the pelvis on the lateral wall of the ischiorectal fossa next to the hypogastric nerve. At the gluteal triangle, this trunk divides into the superior and inferior gluteal branches. The superior gluteal branch runs in the upper direction along the edges of the gluteal muscles, the middle part of it shortens together with these muscles during muscle contraction, turning the limb outward. When the gluteal muscles contract, the limb is retracted, and the gluteal medius blade rotates the limb inward.

Functionally, the main role of the nerve is to transmit sensations of pressure and vibration to the skin of the outer buttocks. Fibers of the nerve trunk in the inferior gluteal branch combine with fibers of the hypogastric nerve to form the internal cutaneous branch of the pudendal nerve. Along the internal pudendal artery, these fibers ascend into the large nerve trunk, forming the genital plexus. The nerve carries sensitive information about the position of the limb and joints - it participates in sensitive acts of coordination of movement and balance of the body.