Lumbosacral plexus

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Lumbosacral Plexus

The Lumbosacral Plexus (pronunciation: lum-bo-sa-kral plek-sus) is a complex network of nerves located in the lower back region of the human body. It is formed by the anterior divisions of the lumbar, sacral, and coccygeal nerves.

Etymology

The term "Lumbosacral" is derived from two Latin words: "lumbus" meaning loin and "sacrum" referring to the sacral region of the spine. "Plexus" is a term used in anatomy to describe a network of nerves or vessels.

Anatomy

The Lumbar Plexus and the Sacral Plexus together form the Lumbosacral Plexus. The lumbar plexus is formed by the anterior divisions of the first four lumbar nerves and the anterior division of the first sacral nerve. The sacral plexus is formed by the lumbosacral trunk, the anterior division of the first sacral nerve, and portions of the anterior divisions of the second and third sacral nerves.

Function

The Lumbosacral Plexus provides motor and sensory nerves for the parts of the lower body, mainly the buttocks, the lower limbs, the pelvic region, and the perineum. It is responsible for the movement and sensation of these areas.

Related Terms

  • Lumbar Plexus: A network of nerves in the lumbar region of the body.
  • Sacral Plexus: A nerve plexus which provides motor and sensory nerves for the posterior thigh, most of the lower leg, the entire foot, and part of the pelvis.
  • Coccygeal Plexus: A small plexus of nerves located in the coccygeal region of the body.
  • Nerve Plexus: A network of intersecting nerves.
  • Perineum: The area between the anus and the scrotum or vulva.

External links

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