Meninges and Dural Venous Sinuses MCQs

Bilateral inferior petrosal sinus sampling (BIPSS) is a useful test for differential diagnosis of central vs. ectopic adrenocorticotropic hormone (ACTH)-dependent Cushing's syndrome (CS). We provide a description of the protocol used in our Center and an analysis of its diagnostic accuracy. Reference: Textbook of Gray's Anatomy, Volume 2, 3rd Edition, Page number - 864

Ans. c. Internal carotid artery Contents of the cavernous sinus Structures in the lateral wall of the sinus Oculomotor (lll) nerve Trochlear (lV) nerve Ophthalmic (1st division of V) nerve Trigeminal ganglion Internal carotid artery Abducent (Vl) nerve

Although the dural sac and subarachnoid space end at S2, the filum terminale externum (AKA coccygeal ligament) is a continuation of the dura mater that extends below the end of the dural sac to attach to the coccyx. Reference: Textbook of Gray's Anatomy for students, 3rd Edition, Back, Page number - 104

The great cerebral vein (vein of Galen) is a deep cerebral vein formed by the basal veins of Rosenthal, the internal cerebral and some superior cerebellar veins. It is situated in the quadrigeminal cistern, posterior to the brainstem and third ventricle. And it drains into straight sinus. Reference: Textbook of Gray's Anatomy for students, 3rd Edition, Head and neck, Page number - 281

Explanation: The spinal dura extends from foramen magnum to the lower border of second sacral vertebra (S2). Similarly arachnoid mater also terminates in S2, whereas pia mater continues further as filum terminale to the coccyx.