The lumbar subarachnoid space is also known as?

The lumbar subarachnoid space is commonly referred to as the lumbar cistern. This space is an important anatomical area located within the lower part of the spinal column, specifically beneath the conus medullaris, where cerebrospinal fluid (CSF) accumulates. The lumbar cistern acts as a reservoir for CSF, which serves to cushion and protect the spinal cord and nerve roots.

During procedures such as a lumbar puncture (spinal tap), clinicians specifically target the lumbar cistern to collect CSF for diagnostic purposes or to administer medications. Understanding the significance of the lumbar cistern is crucial for anyone working with spinal anatomy, neurology, or in procedures involving the central nervous system, as it highlights both its protective role as well as its clinical relevance.

The alternative terms, such as lumbar canal, vertebral space, and spinal sheath, do not accurately describe the anatomy of the subarachnoid space in this context.