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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 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 lateral cutaneous nerve of the thigh may have multiple branches. [1] Its position with relation to the ASIS can be very variable. [3] It may partially pass through sartorius muscle rather than over its surface. [1] It may be absent, and the sensory supply replaced by branches of the femoral nerve and the ilioinguinal nerve. [1]
Lumboinguinal nerve (green) and Ilioinguinal nerve (purple). In modern texts, these two regions are often considered to be innervated by the genitofemoral nerve. Medial cluneal nerves (pink) - labeled as "post. division of sacral" Inferior cluneal nerves (pink region, not designated with its own section)
The anterior scrotal nerves are branches of the ilioinguinal nerve. The nerves innervates the scrotum in males. The equivalent nerves in the female are the anterior labial nerves .
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 internal oblique is supplied by the lower intercostal nerves, as well as the iliohypogastric nerve and the ilioinguinal nerve. Function The internal oblique ...