Dissection 13 Flashcards
What are the two layers of the Dura Mater?
The Periosteal and Meningeal Dura
Where are the venous sinuses located?
The Dura mater
T/F The epidural space is a potential space
True
What is a cistern?
A space between the pia and the arachnoid that is enlarged
What is the largest cistern?
The Cisterna Magna
Where does the CSF return to the venous circulation?
Arachnoid Granulations
What are the functions of the CSF?
delivers nutrients/ removes wastes from the brain tissue and functions in fluid balance and reduces effective weight of the brain
How much CSF is produced daily
500ml
What is the total CSF volume?
150 ml
Where do the dural venous sinuses drain?
The confluence of sinuses
The dural sinuses communicate with the scalp via what
Emissary veins
What does the cavernous sinus hold?
CN III, IV, VI, V1, V2, and the internal carotid artery
What is an arteriovenous fistula?
an abnormal connection between the internal carotid artery and cavernous sinus
What is the epidural space?
Contains the arterial blood supply to the dura mater
What does the subdural space contain?
Veins
What does the subarachnoid space contain?
CSF
The Middle Meningeal artery is a branch of _____, runs through _____ and runs in _____
maxillary artery, foramin spinosum, epidural space
A subdural Hematoma results from?
Shearing off cerebral veins where they penetrate dura (into the superior sagittal sinus
An epidural hematoma results when _____ ruptures and can/can’t cross the midline
middle meningeal; CAN
The posterior cranial fossa is covered by?
The tentorium cerebelli
The anterior fossa contains what bones?
Frontal, sphenoid, and ethmoid
The middle crania fossa contains what bones?
The sphenoid, temporal and parietal
The posterior cranial fossa contains what bones?
Temporal, occipital, sphenoid and parietal
What CNs pierce the dura mater in the anterior cranial fossa?
CN I
What CNs pierce the dura mater in the middle cranial fossa?
CN II
What CNs pierce the dura mater in the posterior cranial fossa
CN III-XII
The cranial nerve with the longest intradural course is?
CN VI
What CNs exit the skull at the anterior cranial fossa
CN I
What CNs exit the skull at the middle cranial fossa?
CN II-VI
What CNs exit the skull through the posterior cranial fossa?
VII-XII
What does the superior orbital fissure contain?
CN III, IV, VI, and V1
The Internal Carotid Artery enters the skull through the ______ and passes over the _____ on its way to the cranial cavity
Carotid Canal; Foramen Lacerum
What runs through the Foramen Lacerum
Nothing :)
What branches ascend through the neck without branching?
vertebral and internal carotid arteries
What CN runs through the Posterior Cerebral and Superior Cerebellar arteries?
CN III
