Lumbar cistern - definition

cerebrospinal fluid filled area between the end of the spinal cord and the end of the vertebral column. Cerebrospinal fluid is often sampled here in a process (i.e. lumbar puncture or spinal tap) that can be used to diagnose a variety of conditions such as meningitis and multiple sclerosis.

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2-Minute Neuroscience: Exterior of the Spinal Cord