iliohypogastrischen

The iliohypogastric nerve is a sensory nerve of the anterior abdominal wall. It originates from the dorsal division of the first lumbar nerve (L1). The nerve emerges from the lateral border of the psoas major muscle and then passes obliquely across the quadratus lumborum muscle. It then pierces the transversus abdominis muscle and the internal oblique muscle. As it approaches the anterior abdominal wall, it divides into two terminal branches: the lateral cutaneous branch and the anterior cutaneous branch.

The lateral cutaneous branch supplies sensation to the skin of the gluteal region, specifically over the area of the iliac crest. The anterior cutaneous branch runs anteriorly, supplying sensation to the skin of the hypogastric region, which is the area below the umbilicus and above the pubic bone. It also provides sensory innervation to the skin over the lateral aspect of the iliac fossa. The iliohypogastric nerve plays a role in pain perception and proprioception in these areas. It is typically located superficially, making it susceptible to injury during abdominal surgeries or trauma. Injury to this nerve can result in numbness, tingling, or chronic pain in the affected regions.