Meninges and sinuses Flashcards
What sinuses converge at the confluence of sinuses?
superior sagittal sinus, straight, and occipital sinus
What structures run through the cavernous sinus?
internal carotid artery, CN III, IV, V1, V2, VI
The confluence of sinuses is deep to what bony landmark?
the external occipital protuberance
If you injure the area of the cavernous sinus, which nerve is most susceptible to being affected?
Abducens (VI)
What is the innervation of the ethmoid sinus?
anterior and posterior ethmoidal branches of the ophthalmic nerve
What is the innervation of the maxillary sinus?
alveolar nerves of V2, and the infraorbital nerve of V2
What is the innervation of the frontal sinus?
supraorbital nerve of the ophthalmic nerve
How does CSF get into the venous system?
By diffusing through arachnoid granulations
What venous sinus do the arachnoid granulations connect to?
superior sagittal sinus
What nerves and fibers innervate the dura?
GSA from V1, V2, V3, and vagus
An epidural bleed is primarily caused by which artery?
MMA
What is a serious consequence of epidural bleeds?
cranial nerve palsy
Subdural bleeds are caused most commonly by what vessels?
Superior cortical veins beyween dura and arachnoid
Which bleed is higher pressure, epidural or subdural?
epidural b/c of arterial source
