<prompt> Which of the following cranial structures are insensitive to painDural sheath surrounding vascular sinusesChoroid plexusFalx cerebriMiddle meningeal aery  <response>: The cranium, brain parenchyma, ependymal lining of the ventricles, and choroid plexus are all pain insensitive . Sensitive Insensitive Extracranial Skin, muscles, fasciaBlood vesselsMucosa of sinusesDental structures Skull except periosteum Intracranial Large aeries near circle of Willis Parenchyma of brain Large venous sinuses Pia mater, arachnoid mater, pas of duramater Dural aeries and pas of dura Ependyma, choroid plexus Ref - pubmed.com 