Position of the spinal cord in the vertebral canal
The spinal cord proper does not extend the entire length of the vertebral canal. It ends between the first and second lumbar vertebra (two vertebra below the last set of ribs - just below the middle of the back), and a bundle of nerves that extend from it, called the cauda equina (“horse’s tail”), extends the rest of the way down the back, and into the sacrum.
In adults, the spinal cord is usually between 17-18 inches long (43-45 cm).Atlas of Applied (Topographical) Anatomy for Students and Practitioners. Dr. Karl von Bardeleben and Dr. Heinrich Haeckel, 1906.

Position of the spinal cord in the vertebral canal

The spinal cord proper does not extend the entire length of the vertebral canal. It ends between the first and second lumbar vertebra (two vertebra below the last set of ribs - just below the middle of the back), and a bundle of nerves that extend from it, called the cauda equina (“horse’s tail”), extends the rest of the way down the back, and into the sacrum.

In adults, the spinal cord is usually between 17-18 inches long (43-45 cm).

Atlas of Applied (Topographical) Anatomy for Students and Practitioners. Dr. Karl von Bardeleben and Dr. Heinrich Haeckel, 1906.

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