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Which nerve is formed from cord levels L4 S3?

Which nerve is formed from cord levels L4 S3?

The apex of this band is continued through the greater sciatic foramen into the gluteal region as the sciatic nerve. The sciatic nerve (L4-S3) is composed of the tibial nerve and the common peroneal nerve running in a common epineurium.

What does S3 nerve control?

S1 nerves affect the hips and groin. S2 nerves affect the back of the thighs. S3 nerves affect the medial buttock area. S4 and S5 nerves affect the perineal area.

Which of the following is located between the L4 and the S3 nerve roots?

The sacral plexus is formed from the L4-S3 nerve roots (Fig. 54.3). It is shaped like a triangle pointing toward the sciatic notch, with its base spanning across the anterior sacral foramina.

Where is S3 in the spine?

The sacral spinal nerve 3 (S3) is a spinal nerve of the sacral segment. It originates from the spinal column from below the 3rd body of the sacrum.

What are the symptoms of L3 nerve damage?

When the L3 spinal nerve is involved, the following symptoms may occur:

  • Sharp pain, typically felt as a shooting and/or burning feeling that may occur in the thigh and/or inner part of the leg.
  • Numbness in the thigh and/or inner part of the leg.
  • Weakness while moving the thigh and/or knee in different directions.

What are symptoms of S3 nerve damage?


  • Pain in the area of the nerves affected by the cysts, especially the buttocks.
  • Weakness of muscles.
  • Difficulty sitting for prolonged periods.
  • Loss of sensation on the skin.
  • Loss of reflexes.
  • Changes in bowel function, such as constipation.
  • Changes in bladder function, including increased frequency or incontinence.

What does C3 and C4 control?

The C2 dermatome handles sensation for the upper part of the head, and the C3 dermatome covers the side of the face and back of the head. (C1 does not have a dermatome.) C4 helps control upward shoulder movements.