The lumbar cistern forms because the vertebral column grows in length more than the spinal cord. A. Side view of the lumbosacral spinal cord and vertebral column at three developmental stages: 3 months, 5 months, and in the newborn. The insets show the fetus at these stages. B. Schematic showing principle of withdrawal of cerebrospinal fluid from the lumbar cistern (lumbar puncture). The needle is inserted into the subarachnoid space of the lumbar cistern. The view on the right shows the relationship between the needle and the roots in the cistern. Note that the lumbar puncture is performed with the patient lying on his or her side. In this figure, the patient is sitting upright to simplify visualization of the procedure and comparison with the anatomy of the vertebrae. (A, Adapted from House EL, Pansky B, and Siegel A. A Systematic Approach to Neuroscience, 3 rd ed. New York, NY: Mc. Graw. Source: Vasculature of the Central Nervous System and the Cerebrospinal Fluid, Neuroanatomy Text and Atlas, 4 e Hill; 1979. B, Adapted from House EL, Pansky B, Siegel A. A Systematic Approach to Neuroscience. 3 rd ed. New York, NY: Mc. Graw-Hill; 1979. ) Citation: Martin JH. Neuroanatomy Text and Atlas, 4 e; 2016 Available at: http: //mhmedical. com/ Accessed: March 12, 2018 Copyright © 2018 Mc. Graw-Hill Education. All rights reserved
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