You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Pain insensitive structure in brain is: and explain in detail?
Choroid plexus Repeat from Al 2009Choroid plexus is pain insensitive structure.Harrison writes-"Relatively .few cranial structures are pain-producing; these include the scalp, middle meningeal aery, dural sinuses, .falx cereberi, and proximal segments of the large pial aeries. The ventricular ependyma, Choroid plexus, pial veins, and much of the brain parenchyma are not pain-producing."Pain SensitivePain InsensitiveScalpPia-arachnoidPeriostiumPial veinsDural sinusesBrain parenchymaMiddle meningeal aeryVentricular ependymaFalx cereberiChoroid plexusProximal segments of the large pial aeries