Pain insensitive structure in brain is:

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