Which structure in the IVF contents pertains to cerebrospinal fluid?

• A. Dural extension
• B. Dorsal root ganglia
• C. Cerebrospinal fluid
• D. Intervertebral veins

Answer: (C)

The question tests how cerebrospinal fluid is related to the structures that pass through the intervertebral foramen. The cerebrospinal fluid is the fluid that bathes the spinal cord and nerve roots, existing in the subarachnoid space and continuing around the exiting roots within the dural sleeves as they pass through the foramen. This fluid environment is what links CSF to the intervertebral foramen contents. The other structures are solid tissues or vessels—the dural extension is part of the meningeal coverings, the dorsal root ganglion contains sensory neuron cell bodies, and the intervertebral veins are blood vessels. So the component associated with cerebrospinal fluid is the cerebrospinal fluid itself.