Equine spinal cord length extends from the foramen magnum to which vertebral level?

Equine spinal cord length extends from the foramen magnum to which vertebral level?

• A. Foramen Magnum to L5/L6
• B. Foramen Magnum to sacrum
• C. Foramen Magnum to T12
• D. Foramen Magnum to L3

Answer: (D)

Spinal cords in horses end well before the end of the vertebral column. The cord starts at the base of the skull (the foramen magnum) and, in horses, terminates around the third lumbar vertebra. Below that level, the canal contains the cauda equina—the nerve roots that continue to exit to innervate the hindquarters and tail. This is why the end point is approximately at L3 and not at sacral levels or as far cranial as T12 or L5/L6. Knowing the termination point helps with localization during neurological assessment and planning spinal procedures, because the actual spinal cord stops at L3 and what remains below is nerve roots rather than the cord proper.

Spinal cords in horses end well before the end of the vertebral column. The cord starts at the base of the skull (the foramen magnum) and, in horses, terminates around the third lumbar vertebra. Below that level, the canal contains the cauda equina—the nerve roots that continue to exit to innervate the hindquarters and tail. This is why the end point is approximately at L3 and not at sacral levels or as far cranial as T12 or L5/L6. Knowing the termination point helps with localization during neurological assessment and planning spinal procedures, because the actual spinal cord stops at L3 and what remains below is nerve roots rather than the cord proper.