Why does a lumbar puncture take place in the lower lumbar region of the spinal cord?

Explanation:

Lumbar puncture is a process usually used to collect cerebro-spinal fluid.  This process is often used to detect diseases of the central nervous system.  Sometimes it is also used to inject medication.Lumbar puncture takes place in the lower lumbar region of the spinal chord because spine contains the cerebrospinal fluid and it becomes safe to collect CSF from this region without any major side effects.

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