H&N - Brain Flashcards
Sinuses of the brain

Meninges of the brain
Dura
Arachnoid
Pia

Falx cerebri
Inner meningeal layer of dura mater

Diaphragm sellae
Covers hypophysial fossa
Has an opening to allow infundibulum of pituitary to connect to base of brain
It’s reflection of dura mater

Arterial supply to dura mater
Anterior meningeal artery
Middle meningeal artery
Posterior meningeal artery

Anterior meningeal artery branch of?
Ethmoid arteries

Middle meningeal artery branch of
maxillary artery

Posterior meningeal artery branch of
Ascending pharyngeal
Occipital
Vertebral

Where is CSF produced
Choroid plexus in lateral, 3rd and 4th ventricles

Where is CSF reabsorbed
Through arachnoid villi which project as clumps (arachnoid granulations) in superior sagittal sinus

Branches of internal carotid artery
Only press carotid arteries momentarily
Only = Opthalmic Press = Posterior communicating Carotid = Choroidal Arteries = Anterior cerebral Momentarily = Middle cerebral

Circle of Willis anatomy

Branches of vertebral artery
Anterior spinal
Posterior spinal
Posterior inferior cerebellar

Branches of basilar artery
Anterior inferior cerebellar artery
pontine arteries
Superior cerebellar artery
Posterior cerebellar artery

Dural venous sinuses

Structures draining into dural sinuses
Diploic veins
Emissary veins (allow infection from outside in)

Structures passing through cavernous sinus
CN6
internal carotid artery

Structures passing through lateral wall of cavernous sinus
CN3, 4, V1, V2

Parasympathetic ganglia
Ciliary
Pterygopalatine
Otic
Submandibular

Nerve of ciliary ganglion
Oculomotor
Function of ciliary ganglion
Pupillary constriction
Eye accommodation
Pterygopalatine ganglion nerve
Greater petrosal nerve: facial nerve
Function of pterygopalatine ganglion function
Innervation of
Lacrimal gland, mucous glands of nasal cavity, maxillary sinus and palate
Otic ganglion nerve
lesser petrosal nerve of CN9


