Dural Sinuses Meninges Wright Flashcards
What is immediately deep to the arachnoid?
Subarachnoid space
Describe the cranial dural septa.
Falx Cerebri: separates cerebrum
Falx Cerebelli: separates the cerebellar lobes
Tentorium cerebelli: separates cerebellum from cerebrum
What structures are associated with the cavernous sinus?
Oculomotor trochlear abducent trigeminal ICA opthalmic maxillary mandibular
Which nerve in the cavernous sinus is not embedded in the wall?
Abducens
Functions of CSF
Buoyancy protection environmental stability
Where is CSF formed
choroid plexus in each ventricle produced from ependymal cells
Concentrations of CSF
similar to plasma but has greater amounts of Na H and Ca but LESS potassium
What vein drains the scalp
Emissary vein
What typically causes hydrocephalus? What is treatment?
Obstruction is CSF flow that will restrict reabsorption in the venous bloodstream. It is treated with a ventriculoperitoneal shunt that drains to the abdominal cavity OR more likely a ventriculostomy that makes a hole in floor of third ventricle to drain into subarachnoid space
What two veins form the external jugular?
Posterior branch of the retromandibular and posterior auricular vein
Where does the facial vein drain?
Into the anterior branch of the retromandibular which will go to the posterior branch into the EJV
Describe the facial veins path to the cavernous sinus?
Facial vein splits into superior and inferior opthalmic veins to drain the eye into the cavernous sinus
Where is the carotid sinus located located and what are its functions?
superior to the bifurcation on internal carotid. Baroreceptors innvervated by glossopharyngeal
Branches of the ECA?
Superior thyroid Ascending pharyngeal Lingual Facial Occipital Posterior auricular Maxillary Superficial temporal
What artery runs with the superior laryngeal nerve?
Superior laryngeal artery
