page_title: Posterior branches of sacral nerves
hierarchical_section_title: Posterior branches of sacral nerves
caption_attribution_description: Areas of distribution of the cutaneous branches of the posterior divisions of the spinal nerves. The areas of the medial branches are in black, those of the lateral in red. (H. M. Johnston.)
context_page_description: 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 away under the person's weight.
  The upper three are covered at their points of exit by the multifidus and divide into medial and lateral branches.
context_section_description: 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 away under the person's weight.
  The upper three are covered at their points of exit by the multifidus and divide into medial and lateral branches.
caption: Areas of distribution of the cutaneous branches of the posterior divisions of the spinal nerves. The areas of the medial branches are in black, those of the lateral in red.
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