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30 paź 2023 · The sacral plexus is a network of nerves formed by the lumbosacral trunk (L4, L5) and sacral spinal nerves (S1 - S4). The sacral plexus is located on the posterior pelvic wall, posterior to the internal iliac vessels and ureter, and anterior to the piriformis muscle.
- Lumbosacral Trunk
The lumbosacral trunk is a thick nervous band that arises...
- Perineal Nerve
The perineal nerve is a large terminal branch of the...
- Posterior Hip Musculature
The posterior hip musculature comprises a group of muscles...
- External Anal Sphincter
The external anal sphincter is a short tube of skeletal...
- Lumbosacral Trunk
8 lip 2023 · The plexus is formed by the anterior rami (divisions) of the sacral spinal nerves S1, S2, S3 and S4. It also receives contributions from the lumbar spinal nerves L4 and L5. In this article, we shall look at the anatomy of the sacral plexus – its formation and major branches.
28 wrz 2024 · The sacral plexus is a network of nerves formed by the union of the ventral rami of the L4, L5, S1, S2, S3, and a part of S4 spinal nerves. It is responsible for supplying nerves to the pelvis, lower limb, and parts of the genital and urinary systems.
28 kwi 2023 · The sacral plexus is a network of nerves emerging from the lower part of the spine. These nerves provide motor control to and receive sensory information from most of the pelvis and leg. A plexus is a web of nerves that share roots, branches, and functions.
The five main nerves of the sacral plexus can be remembered by the acronym SIPPS – superior gluteal nerve, inferior gluteal nerve, posterior cutaneous nerve of the thigh, pudendal nerve, and sciatic nerve. In terms of nerve roots, most of the nerves of the sacral plexus have three.
The short branches of the sacral plexus innervate the muscles of the pelvic girdle, perineal muscles and the skin of the external genitals. The short branches are the following: Superior gluteal nerve; Inferior gluteal nerve; Pudendal nerve; Muscular branches; The long branches of the sacral plexus innervate the
The nerves forming the sacral plexus converge toward the lower part of the greater sciatic foramen, and unite to form a flattened band, from the anterior and posterior surfaces of which several branches arise.
