Iliohypogastric nerve
Encyclopedia
The iliohypogastric nerve is the superior branch of the anterior ramus of spinal nerve
L1 (one of the lumbar nerves
) after this nerve receives fibers from T12 (subcostal nerve
). The inferior branch is the ilioinguinal nerve
.
It emerges from the upper part of the lateral border of the psoas major, and crosses obliquely in front of the quadratus lumborum to the iliac crest. Running posterior to the kidneys.
It then perforates the posterior part of the transversus abdominis, near the crest of the ilium, and divides between that muscle and the obliquus internus abdominis into a lateral and an anterior cutaneous branch.
and ilioinguinal nerve
s.
Spinal nerve
The term spinal nerve generally refers to a mixed spinal nerve, which carries motor, sensory, and autonomic signals between the spinal cord and the body...
L1 (one of the lumbar nerves
Lumbar nerves
The lumbar nerves are the five spinal nerves emerging from the lumbar vertebrae. They are divided into posterior and anterior divisions.-Posterior divisions:...
) after this nerve receives fibers from T12 (subcostal nerve
Subcostal nerve
The anterior division of the twelfth thoracic nerve is larger than the others; it runs along the lower border of the twelfth rib, often gives a communicating branch to the first lumbar nerve, and passes under the lateral lumbocostal arch.It then runs in front of the Quadratus lumborum, perforates...
). The inferior branch is the ilioinguinal nerve
Ilioinguinal nerve
The ilioinguinal nerve is a branch of the first lumbar nerve . It separates from the first lumbar nerve along with the larger iliohypogastric nerve....
.
It emerges from the upper part of the lateral border of the psoas major, and crosses obliquely in front of the quadratus lumborum to the iliac crest. Running posterior to the kidneys.
It then perforates the posterior part of the transversus abdominis, near the crest of the ilium, and divides between that muscle and the obliquus internus abdominis into a lateral and an anterior cutaneous branch.
Branches
Branches include:- Lateral cutaneous branch of iliohypogastric nerveLateral cutaneous branch of iliohypogastric nerveThe lateral cutaneous branch pierces the Obliqui internus and externus immediately above the iliac crest, and is distributed to the skin of the gluteal region, behind the lateral cutaneous branch of the last thoracic nerve; the size of this branch bears an inverse proportion to that of the lateral...
- Anterior cutaneous branch of iliohypogastric nerveAnterior cutaneous branch of iliohypogastric nerveThe anterior cutaneous branch continues onward between the Abdominal internal oblique and transverse muscles....
Communication
The iliohypogastric nerve communicates with the subcostal nerveSubcostal nerve
The anterior division of the twelfth thoracic nerve is larger than the others; it runs along the lower border of the twelfth rib, often gives a communicating branch to the first lumbar nerve, and passes under the lateral lumbocostal arch.It then runs in front of the Quadratus lumborum, perforates...
and ilioinguinal nerve
Ilioinguinal nerve
The ilioinguinal nerve is a branch of the first lumbar nerve . It separates from the first lumbar nerve along with the larger iliohypogastric nerve....
s.