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Contrary to what might be assumed, the spinal cord does not extend the full length of the spine. Instead, its structure concludes at a point just below the rib cage.

Spinal Cord Termination Point

A physician needs to perform a lumbar puncture (spinal tap), which involves inserting a needle into the spinal canal in the lower back to collect cerebrospinal fluid. Why is this procedure typically performed in the region just below the rib cage?

A patient is diagnosed with a fracture of the L4 vertebra, located in the lower back. Based on the typical anatomical arrangement of the central nervous system, which of the following structures would most likely be directly damaged by this specific injury?

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