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In human anatomy, the sacral plexus is a nerve plexus which provides motor and sensory nerves for the posterior thigh, most of the lower leg and foot, and part of the pelvis. It is part of the lumbosacral plexus and emerges from the lumbar vertebrae and sacral vertebrae (L4-S4). [ 1 ]
It is a branch of the sacral plexus. It supplies the skin of the posterior surface of the thigh , leg , buttock , and also the perineum . Unlike most nerves termed "cutaneous" which are subcutaneous, only the terminal branches of this nerve pass into subcutaneous tissue before being distributed to the skin, with most of the nerve itself ...
Lumbosacral plexus. Lumbar plexus – serves the back, abdomen, groin, thighs, knees, and calves Subsartorial plexus – below the sartorius muscle of thigh; Sacral plexus – serves the pelvis, buttocks, genitals, thighs, calves, and feet; Pudendal plexus; Coccygeal plexus – serves a small region over the coccyx; Autonomic plexuses
The sacral sympathetic nerves arise from the sacral part of the sympathetic trunk, emerging anteriorly from the ganglia.They travel to their corresponding side's inferior hypogastric plexus, where the preganglionic nerve fibers synapse with the postganglionic sympathetic neurons, whose fibers ascend to the superior hypogastric plexus, the aortic plexus and the inferior mesenteric plexus, where ...
The anterior divisions of the lumbar nerves, sacral nerves, and coccygeal nerve form the lumbosacral plexus, the first lumbar nerve being frequently joined by a branch from the twelfth thoracic. For descriptive purposes this plexus is usually divided into three parts: lumbar plexus; sacral plexus; pudendal plexus
In humans, the sciatic nerve is formed from the L4 to S3 segments of the sacral plexus, a collection of nerve fibres that emerge from the sacral part of the spinal cord. The lumbosacral trunk from the L4 and L5 roots descends between the sacral promontory and ala, and the S1 to S3 roots emerge from the ventral sacral foramina.
The nerve to piriformis is a branch of the sacral plexus. [1] [2] It (typically [3]) arises from the posterior divisions [4] /branches [3] of anterior rami of S1 and S2.
The pelvic splanchnic nerves arise from the anterior rami of the sacral spinal nerves S2, S3, and S4, and enter the sacral plexus. [1] [2] [3] They travel to their side's corresponding inferior hypogastric plexus, located bilaterally on the walls of the rectum.