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The ilioinguinal nerve is a branch of the first lumbar nerve (L1). It separates from the first lumbar nerve along with the larger iliohypogastric nerve . It emerges from the lateral border of the psoas major just inferior to the iliohypogastric , and passes obliquely across the quadratus lumborum and iliacus .
The iliohypogastric nerve originates from the superior branch of the anterior ramus of spinal nerve L1. [2] It also receives fibers from T12 via the subcostal nerve. [2] The branch below it is the ilioinguinal nerve. [2]
The lumbar plexus block is an advanced technique indicated for hip, anterior thigh, and knee surgery. [54] The lumbar plexus is composed of nerves originating from L1 to L4 spinal roots such as the iliohypogastric, ilioinguinal, genitofemoral, lateral femoral cutaneous, femoral, and obturator nerves. [54]
ilioinguinal neuropathy; iliohypogastric neuropathy; genitofemoral neuropathy; posterior femoral cutaneous neuropathy; obturator neuropathy; neuropathy of gluteal nerves;
It is a triangular opening that forms the exit of the inguinal canal, which houses the ilioinguinal nerve, the genital branch of the genitofemoral nerve, and the spermatic cord (in men) or the round ligament (in women). At the other end of the canal, the deep inguinal ring forms the entrance. [11]
It communicates with the iliohypogastric nerve and the ilioinguinal nerve of the lumbar plexus, [1] [2] and gives a branch to the pyramidalis muscle and the quadratus lumborum muscle. [3] It also gives off a lateral cutaneous branch that supplies sensory innervation to the skin over the hip.
The three terminal branches of this nerve are the iliohypogastric, ilioinguinal, and the genitofemoral nerves. L1 supplies many muscles, either directly or through nerves originating from L1. They may be innervated with L1 as single origin, or be innervated partly by L1 and partly by other spinal nerves. The muscles are: quadratus lumborum (partly)
The internal oblique is supplied by the lower intercostal nerves, as well as the iliohypogastric nerve and the ilioinguinal nerve. Function The internal oblique ...