https://stream.echo6.co/videos/watch/22b40ab9-a6ff-4452-beb2-108e50115aba Official Ninja Nerd Website: https://ninjanerd.org Ninja Nerds! In this lecture, Professor Zach Murphy presents the anatomy of the brain meninges and explains their relationship to different types of intracranial hemorrhages. We begin with the three protective meningeal layers—dura mater, arachnoid mater, and pia mater—describing their location, structure, and function. The dura mater is the tough, outermost layer that provides a protective barrier. In contrast, the arachnoid mater lies beneath it, separated from the pia mater by the cerebrospinal fluid–filled subarachnoid space. The pia mater is the delicate innermost layer that closely follows the contours of the brain surface. The lecture then details the key potential and actual spaces where bleeding can occur. We discuss the epidural space between the skull and dura mater, where arterial bleeds (often involving the middle meningeal artery) can cause rapidly expanding hematomas. The subdural space, between the dura and arachnoid mater, is where venous bleeding from bridging veins can result in slower-developing subdural hematomas. In the subarachnoid space, arterial ruptures—often from aneurysms—lead to subarachnoid hemorrhage with blood mixing into cerebrospinal fluid. Finally, intracerebral hemorrhages occur within the brain parenchyma itself, often due to hypertensive vessel rupture or hemorrhagic transformation of an infarct. We connect these anatomical spaces to their characteristic imaging findings, time courses, and common clinical presentations, helping you visualize how meningeal anatomy directly relates to patient symptoms and radiologic patterns. This lecture bridges anatomy with clinical neurology and emergency medicine by tying structural detail to pathophysiologic consequences. Enjoy the lecture and support us below! 🌐 Official Links Website: https://www.ninjanerd.org Podcast: https://podcast.ninjanerd.org Store: https://merch.ninjanerd.org 📱 Social Media https://www.tiktok.com/@ninjanerdlectures https://www.instagram.com/ninjanerdlectures https://www.facebook.com/ninjanerdlectures https://x.com/ninjanerdsci/ https://www.linkedin.com/company/ninja-nerd/ 💬 Join Our Community Discord: https://discord.gg/3srTG4dngW #ninjanerd #BrainMeninges #Neurology Wed, 15 Apr 2026 11:42:48 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/22b40ab9-a6ff-4452-beb2-108e50115aba All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.