CT BRAIN Chapter 2 Cisterns amp Ventricles

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=xcD8gsKu3sA

This video is 2nd in the series of CT BRAIN, designed specifically for doctors and junior residents to deepen their understanding of the cisterns and ventricles of the brain as visualized on CT scans. • Link to previous video: • • Lobes of the Brain |CT BRAIN| Chapter#1 • Link to next chapter • • Brain parenchyma, Internal capsule, D... • The video will provide a brief overview of the anatomy of the brain, highlighting the cisterns and ventricles. • chapters • 0:00 Recap • 1:17 Cisterns • 2:34 vessels in cisterns • 3:13 Cerebrospinal Fluid(CSF) • 4:20 Ventricles • The cisterns of the brain are fluid-filled spaces within the subarachnoid space that serve as reservoirs for cerebrospinal fluid (CSF). These cisterns are formed where the arachnoid membrane separates from the pia mater, creating larger cavities that accommodate CSF, blood vessels, and cranial nerves. They play a crucial role in cushioning the brain, maintaining intracranial pressure, and facilitating CSF circulation throughout the central nervous system. • Cisterns are clinically significant and it is important that a doctor should be able to identify it on CT scan. • The ventricles of the brain are interconnected cavities filled with cerebrospinal fluid (CSF) that cushion the brain, maintain intracranial pressure, and facilitate the circulation of CSF throughout the central nervous system. These ventricles are lined with ependymal cells that help produce and regulate CSF, which is essential for protecting the brain and spinal cord from trauma and clearing metabolic waste. • In adults approximately 400-600ml CSF is produced everyday, primarily by the choroid plexus, a network of blood vessels found in all lateral ventricles (95%) and partly from 4th ventricle. • Ependymal cells within the choroid plexus secrete CSF, which is a clear, colorless fluid. • Flow from the Lateral Ventricles: • CSF flows from the lateral ventricles (located within each cerebral hemisphere) into the third ventricle through the interventricular foramina (foramina of Monro). Third ventricle is a narrow, midline structure located between the two thalami. • From the third ventricle, CSF flows into the fourth ventricle via the cerebral aqueduct. • CSF exits the fourth ventricle through three openings: • The median aperture (foramen of Magendie), which allows CSF to enter the cisterna magna. • The two lateral apertures (foramina of Luschka), which drain CSF into the pontine cistern and subarachnoid space around the brain. • CSF circulates around the brain and spinal cord within the subarachnoid space, bathing the brain and spinal cord in fluid. • Major cisterns, such as the cisterna magna, interpeduncular cistern, and quadrigeminal cistern, help distribute CSF throughout the subarachnoid space. • Absorption into the Venous System: • CSF is absorbed into the bloodstream via the arachnoid granulations (villi), which are small protrusions of the arachnoid membrane into the dural venous sinuses, primarily the superior sagittal sinus. • This process ensures that CSF is continuously replaced, maintaining a balance between production and absorption. • #ctscan #brain #neuroscience #neuroanatomia #brainanatomy #neurosurgery_made_easy #neurosurgerytraining #brainsurgery #ctbrain #mri #medicaleducation #howtoreadctscan #ctscanner #ventricles #cistern

#############################

New on site