The lumbosacral plexus is a network of nerves derived from lumbar and sacral roots with each one of them dividing into anterior and posterior branches.
What is the function of the lumbosacral plexus?
It is created from lumbar spinal nerves L2, L3, and L4. Its principal function is to supply motor and sensory innervation to the anterior compartment of the thigh. The nerve exits the plexus and enters the femoral triangle, passing just lateral to the femoral artery.
Where is lumbosacral plexus?
The lumbosacral plexus is formed by the anterior rami of the nerves (spinal segments T12–S4) to supply the lower limbs. The lumbosacral plexus can be divided into the lumbar plexus, which innervates the ventral upper half, and the sacral plexus, which mainly innervates the dorsal side.
What causes lumbar plexus pain?
The most frequent causes are high-energy trauma, sports injuries, penetrating trauma, and surgery that results in damage to the plexus. In particular, injuries that cause damage between the spinal cord and spinal ganglion (proximal) lead to severe pain.
What happens if the lumbar plexus is damaged?
Malfunction of the lumbosacral plexus causes pain in the lower back and leg as well as weakness and loss of sensation in all or part of a leg (such as the foot or calf).
What does the genitofemoral nerve do?
The genitofemoral nerve supplies sensation via the femoral branch and motor innervation via the genital branch. The cremasteric reflex is a function of genitofemoral nerve innervation, as it supplies sensation to the superior medial aspect of the thigh.
What are lumbosacral lesions?
Lesion of the lumbosacral plexus by lumbar disc degeneration leads to a lumbosacral radicular syndrome. This syndrome is characterized by a radiating pain in one or more lumbar or sacral nerve dermatomes and decreased motor function. Sometimes, it may be regarded as sciatica, ischias, or nerve root pain .
Which is the largest nerve?
The sciatic nerve is the largest and longest nerve in the human body, originating at the base of the spine and running along the back of each leg into the foot.
What does the Genitofemoral nerve innervate?
The genital branch of the genitofemoral nerve penetrates the dorsal wall of the inguinal canal and innervates the spermatic cord and the skin of the scrotum in a male, while in a female it innervates the round ligament of the uterus and the skin of the labia majora.
What area of the body is affected by the lumbar plexus?
Lumbar plexus: Back, abdomen, groin, thighs, knees, calves. Sacral plexus: Pelvis buttocks, genitals, thighs, calves, feet. Coccygeal plexus: A small region over the coccyx (your “tailbone”)2
What does a lumbar plexus MRI show?
MRI of a normal lumbosacral plexus demonstrates symmetric caliber and signal intensity of the exiting nerve roots. MRI of a normal lumbosacral plexus demonstrates symmetric caliber and signal intensity of the exiting nerve roots.
What is lumbosacral Radiculoplexus neuropathy?
Lumbosacral radiculoplexus neuropathy (LRPN) is an immune-mediated neuropathy that typically starts unilaterally with pain, followed by weakness, usually in proximal slightly more than distal lower extremity segments.
What is a benefit of a nerve plexus?
What is a benefit of a nerve plexus? A plexus does not allow for redistribution. They provide a straight path from the spinal cord to target muscles. Damage to one single branch of a plexus does not necessarily disrupt all motor information sent to a region. The dorsal ramus can be distributed to many areas.