Which of the following cranial structures are insensitive to pain:
Answer is B (Choroid plexus): Choroid plexus is a pain insensitive cranial structure. The ventricular ependyma, choroids plexus, pial veins and much of brain parenchyma are not pain producing'- Harrison's Pain Sensitive Intracranial Cranial venous sinuses with afferent veins Aeries at base of brain and aeries of dura including middle meningeal aery Dura around venous sinuses and vessels Falx Cerebri Extracranial Skin Scalp Appendages Periostium Muscles Aeries Mucosa Nerves Trigeminal (Vth) Facial (VIII) Vagal (X) Glossopharyngeal(IX) Second (II) & Third (IIIrd) C.N. Pain Insensitive Intracranial Brain parenchyma Ependyma Choroid plexus Piamater Arachnoid Dura over convexity of skull (Dura around vascular sinuses and vessels is sensitive to pain)
Dural sheath surrounding vascular sinuses
Choroid Plexus
Falx cerebri
Middle meningeal Aery