Mod 5 Anatomy Flashcards
What makes up the Leptomeninx?
pia mater and arachnoid are considered together as a functional unit and contraposed to pachymeninx
What is the pachymeninx?
Dura mater, also known as the pachymeninx
What is in the subarachnoid space?
CSF
Which layer of the Dura adhers to the internal surface of the Cranium?
External Periosteal Layer
What is the Falx cerebri ??
Vertical fold of dura that begins anteriorly at the crista galli
- winds around the corpus callosum to the falcotentorial junction on the superior aspect of the tentorium cerebelli
Is falx cerebri the same as dura mater?
The falx cerebri is a meningeal projection of dura in the brain. It is a sickle-shaped fold of dura mater located at the midline between the two cerebral hemispheres.
What is the tentorium cerebelli?
dura mater that separates the occipital lobes and cereberal hemispheres from the cerebellum
The falx cerebelli is ?? and seperates?
The falx cerebelli is a small fold of the meningeal cranial dura mater. It separates the right and left cerebellar hemispheres
The falx cerebri separates ? and Houses?
The falx cerebri separates the cerebral hemispheres and houses the dural sinuses, into which the blood and cerebrospinal fluid drain
What lies in the longitudinal cerebral fissure?
Falx Cerebri
The Falx Cerebri attaches?
In the Median plane, to the internal surface of the Calvaria from the frontal bone, and ethmoid bone, to internal occipital protuberance
The Falx Cerebri continues as?
Tentorium Cerebelli
What is the largest and second largest dural folds?
Largest- Falx Cerebri, Second- Tentorium Cerebelli
What attaches to the Tentorium Cerebelli ?
Falx Cerebri
Most of the blood from the brain drains into?
Internal Jugular vein
What is the Superior Sagittal sinus?
Begins at the Crista Galli, ends internal occipital protub
Lays in the Falx Cerebrum, Along the Sagittal groove, Drains anterior Cerebral Hemisphere
The confluence of sinus’s in the head is a meeting of?
Superior Sagittal
Straight sinus
Occipital sinus
Transverse sinus
The Superior Sagittal sinus receives the ______ veins and communiucates on each side through?
Superior Cerebral veins
Lateral venous Lacunae
What are Arachnoid Granulations?
Arachnoid sacs that protrude through menengial layer of dura into dural venous sinuses
Inferior Sagittal sinus runs? and ends ?
Runs in the inferior concave free boarder of Falx Cerebri ends in straight sinus
The straight sinus is formed by?
union of Inf. Sagittal Sinus and Great Cerebral vein
Blood received by the confluence of sinuses is drained?
By transverse sinus
What nerves pass through the cavernous sinus ? and Mjr Artery?
Oculomotor nerve (CN III)
Trochlear nerve (CN IV)
Ophthalmic nerve (V1), maxillary nerve (V2)
Abducens nerve (CN VI)
Internal Carotid Artery
What are the tributaries of the Cavernous sinus?
Ophthalmic vein (Sup/ Inf)
Superficial middle cerebral vein
Inferior cerebral veins
Sphenoparietal sinus
Middle meningeal vein.
The cavernous sinuses empty into the ______, and ultimately, into the _______.
The cavernous sinuses empty into the superior and inferior petrosal sinuses, and ultimately, into the internal jugular vein.
The left and right cavernous sinuses are connected in the midline by the___________ They travel through the s____of the sphenoid bone.
Anterior and posterior intercavernous sinuses. They travel through the sella turcica of the sphenoid bone.
What veins connect the dural venous sinus’s with the outside veins of the Cranium?
Emissary Veins
Middle Meningeal artery arises from? and Passes where?
Arises from Maxillay artery, passes through infratemporal fossa
The Middle Meningeal Artery supplies?
Dura Mater
Where does the Middle Meningeal Artery enter the middle cranial fossa?
Foramen spinosum
What are the branches of the Middle Meningeal Artery?
Ant/ Post Division with a frontal and parietal branch of the middle Meningeal Artery
The Meningeal veins Leave the Cranial cavity through the? and Drain into?
Foramen spinosum and drain into Pterygoid venous plexus
What nerves supply the Dura Mater?
(Trigeminal Nerve CNV)
V1- Ethmoidal Branch
V2 -Menengial branches
V3- Mandibular
Is the Trigeminal Nerve Sensory or Motor?
Mandibular- V3 is the only branch which contains both sensory and motor components:the
Opthalmic (V1) and Maxillary (V2) nerves contain only sensory fibres
What does the Tentorial nerve supply sensory info from?
Fall Cerebri, and Tentorium Cerebelli
