Pain insensitive structure in brain is
Pain Insensitive structures in Brain :Brain parenchymaEpendymaChoroid plexusPia matterArachnoidDura over convexity of skull ( Dura around vascular sinuses and vessels is sensitive to pain)Pain Sensitive structures in Brain :Cranial venous sinuses with afferent veinsAeries at base of brain and aeries of dura including middle meningeal aery.(Ref: Gray&;s anatomy, page 404)
Falx cerebri
Dural she ath surrounding vascular sinuses
Middle meningeal aery
Choroid plexus
Brain 