3 doctors weighed in:

Which part of the spinal column has the narrowest canal for the cord to pass through?

3 doctors weighed in
Dr. Douglas Linville II
Orthopedic Surgery - Spine
1 doctor agrees

In brief: Canal anatomy

The diameter of the bony spinal canal is largest c1-2, and then in the lumbar spine.
The spinal cord ends at l1-2. Generally, the canal is relatively constant in diameter from the cervical to thoracic spine accommodating the cord and providing another 60% of its diameter as a buffer for spinal fluid and tissues. Average diameters are around 17mm throughout and considered critical if under 10 mm.

In brief: Canal anatomy

The diameter of the bony spinal canal is largest c1-2, and then in the lumbar spine.
The spinal cord ends at l1-2. Generally, the canal is relatively constant in diameter from the cervical to thoracic spine accommodating the cord and providing another 60% of its diameter as a buffer for spinal fluid and tissues. Average diameters are around 17mm throughout and considered critical if under 10 mm.
Dr. Douglas Linville II
Dr. Douglas Linville II
Thank
Dr. Stuart Novack
Internal Medicine - Rheumatology

In brief: Variable

As one ages the lumbar spine narrows more than the cervical spine;;injuries may contribute to the problem.

In brief: Variable

As one ages the lumbar spine narrows more than the cervical spine;;injuries may contribute to the problem.
Dr. Stuart Novack
Dr. Stuart Novack
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