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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] A sacral plexopathy is a disorder affecting the nerves of the ...
The sacrum (pl.: sacra or sacrums [1]), in human anatomy, is a large, triangular bone at the base of the spine that forms by the fusing of the sacral vertebrae (S1–S5) between ages 18 and 30. [2] The sacrum situates at the upper, back part of the pelvic cavity, between the two wings of the pelvis. It forms joints with four other bones.
Sacral nerve stimulation. Sacral nerve stimulation, also termed sacral neuromodulation, is a type of medical electrical stimulation therapy. It typically involves the implantation of a programmable stimulator subcutaneously, which delivers low amplitude electrical stimulation via a lead to the sacral nerve, usually accessed via the S3 foramen.
It stems from the spinal nerves S2–S4 of the sacral plexus. [22] [23] The nerve progresses through the piriformis and coccygeus muscles and exits the pelvis by passing through the greater sciatic foramen. [22] The pudendal nerve then re-enters the pelvic cavity by passing through the lesser sciatic foramen.
The thecal sac or dural sac is the membranous sheath (theca) or tube of dura mater that surrounds the spinal cord and the cauda equina. The thecal sac contains the cerebrospinal fluid which provides nutrients and buoyancy to the spinal cord. [1] From the skull the tube adheres to bone at the foramen magnum and extends down to the second sacral ...
The areas of the medial branches are in black, those of the lateral in red. The posterior divisions of the sacral nerves are small and diminish in size as they move downward; they emerge, except the last, through the posterior sacral foramina. In some rare cases these nerves break and cause the person's legs to become weak and eventually wither ...
The intervertebral foramen (also neural foramen) (often abbreviated as IV foramen or IVF) is an opening between (the intervertebral notches of [1]) two pedicles (one above and one below) of adjacent vertebra in the articulated spine. [2]: 424, 425 Each intervertebral foramen gives passage to a spinal nerve and spinal blood vessels, and lodges a ...
6426. Anatomical terminology. [ edit on Wikidata] The sacral spinal nerve 4 (S4) is a spinal nerve of the sacral segment. [ 1] It originates from the spinal column from below the 4th body of the sacrum. Sacrum, showing bodies in center.