video1.0<iframe src="https://www.loom.com/embed/d9a1a81c31ec4f77bc47cce7cfd3d623" frameborder="0" width="1920" height="1440" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>14401920Loomhttps://www.loom.com14401920https://cdn.loom.com/sessions/thumbnails/d9a1a81c31ec4f77bc47cce7cfd3d623-8f80528044455de5.gif4161.16This Loom explains central nervous system development and the structures of the brain, meninges, and cerebral spinal fluid flow. It reviews embryology from the neural tube to primary brain vesicles (forebrain, midbrain, hindbrain) and secondary brain vesicles (telencephalon, diencephalon, mesencephalon, metencephalon, myelencephalon), linking them to adult structures such as cerebrum, thalamus and hypothalamus, midbrain, pons and cerebellum, and medulla. The presenter details meninges layers and spaces, including CSF location in the subarachnoid space and reabsorption at arachnoid granulations into dural venous sinuses, plus epidural versus subdural hematomas and why kids often have worse prognosis. It also walks through CSF production and path from the lateral ventricle through the interventricular foramen of Monroe, third ventricle, cerebral aqueduct, and fourth ventricle to the apertures of Magendie and Luschka, with around 500 mL produced daily and turnover about every eight hours. Finally, it summarizes lumbar puncture rationale, safety landmarks (spinal cord ends around L2, so puncture between L3-4 or L4-5), normal CSF expectations, and an overview of the circle of Willis and common berry aneurysm location.