Pain insensitive structure in brain is: (A) Falx cerebri, (B) Dural she ath surrounding vascular sinuses, (C) Middle meningeal aery, (D) Choroid plexus
Answer is D. 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)