Ventricles, Hemispheres, Venous Sinuses, Skull Base Flashcards
Components of ventricular system
Lateral ventricles Foramen of Munro Third ventricle Aqueduct of Sylvius Fourth ventricle
The foramina of Munro connects
the two lateral ventricles to the third ventricle
The cerebral aqueduct of Sylvius connects
the third ventricle to the fourth ventricle
The fourth ventricle empties into
the subarachnoid space through its median aperture, (the foramen of Magendie) and its two lateral apertures (the foramina of Luschka)
Superficial and deep veins of the brain drain into
venous sinuses which lie between the two layers of dura mater
Dural venous sinuses join together and ultimately drain into
the internal jugular veins
Causes of cerebral venous thrombosis
Infection in mastoids or orbit Oral contraceptives Dehydration Cancer Sepsis Myeloproliferative disorders Pregnancy and puerperium
Presentation of cerebral venous thrombosis
Headaches (92%) Strokes Seizures Decreased conscious state Intracranial hypertension Nausea and vomiting Papilloedema Visual obscuration
Treatment of cerebral venous thrombosis
Anticoagulation
Outcome of cerebral venous thrombosis
10% mortality
Usually complete recovery with treatment
Bones that form the base of the skull
Occipital Temporal Sphenoid Frontal Ethmoid (maxillary and palatine if viewed from below)
Name the meninges
Dura mater
Arachnoid mater
Pia mater
Function of meninges
Provide supportive framework for cerebral and cranial vasculature and protect CNS from mechanical damage
Two main dural reflections
Tentorium cerebelli
Falx cerebri
Openings of the skull
Foramen magnum Optic canals Foramina ovale Foramina rotunda Jugular foramina Cribriform plate Superior orbital fissures Internal auditory meatii Stylomastoid foramina Carotid canals Foramina spinosa
