Ventricles, Hemispheres, Venous Sinuses and Skull Base Flashcards
What is the foramina of munro?
Foramina of Munro, also called the interventricular foramina, connect the two lateral ventricles to the third ventricle
What is the mesencephalic duct?
The cerebral aqueduct of Sylvius, also called the mesencephalic duct, connects the third ventricle to the fourth ventricle
The fourth ventricle empties into the subarchnoid space through what?
its median aperture, the foramen of Magendie
its two lateral apertures, the foramina of Luschka
What passes through the One foramen magnum?
cervicomedullary junction, two vertebral arteries - important for all nervous functions under the head
What passes through the Two optic canals
optic nerve II - for vision
What passes through the Two foramina ovalia?
mandibular branch of trigeminal nerve V3 - needle entry point for trigeminal nerve anaesthesia
What passes through the Two foramina rotunda?
maxillary branch of trigeminal nerve V2 - numb patch on face after trauma
What passes through the Two jugular foramina?
sigmoid sinuses go through this to become the two internal jugular veins - the main venous outflow tracts for blood from the brain
What passes through the The cribriform plate?
many small holes for the olfactory receptor neurones—anosmia after trauma
What passes through the Two superior orbital fissures?
oculomotor III, trochlear IV, ophthalmic V1 and abducens VI - pupil dilatation, drooping eyelid, eye movement syndrome and forehead sensation
What passes through the Two internal auditory meatii?
facial VII and vestibulocochlear VIII - unilateral sensorineural deafness in vestibular schwannoma
What passes through the Two stylomastoid foramina?
facial nerves VII
What passes through the Two carotid canals?
internal carotid artery
What passes through the Two foramina spinosa?
middle meningeal artery - artery may be damaged further up, deep to the pteryon
What are contents of the interal auditory canal?
Facial nerve VII
Vestibulocochlear nerve VIII
What structures form the skull base?
Occipital bone
Temporal bone
Sphenoid bone
Frontal bone
Ethmoid bone
Maxillary and palatine bones if viewed from below
