Anatomy B5 W4 Flashcards
Cingulate
Area above the corpus callosum- component of the limbic system for processing emotions and regulating behaviour
Cingulate sulcus
Sulci above the cingulate
Insula
Fissure which is deep in the lateral sulcus that separates the frontal, parietal and temporal lobes. Responsible for pain processing, addiction and self-awareness
Brain operculum
Covering flap within the inferior frontal gyrus. It contains the insula of the temporal lobe
Falx cerebri
Invagination of the dura mater into the longitudinal fissure between the cerebral hemispheres
Falx cerebelli
Invagination/fold of the dura mater between the two cerebellar hemispheres
Tentorium cerebelli
Dural reflection which separates the occipital and temporal cerebral hemisphere from the cerebellum
Tentorial notch
Free edge for passage of the brainstem near the tentorium cerebelli
Cavernous sinus
Venous plexus located behind the eye socket, near the multiple veins. Contains the internal carotid artery, opthalamic nerve, abducens nerve and trochlear nerve. Blood clot can form here and lead to infection spreading due to infection in the facial or skull region.
Venous drainage
All veins drain into the sigmoid vein which drains straight into the internal jugular vein
Inferior petrosal sinus
Venous channel which empties blood from cavernous sinus, the midbrain, cerebellum and inner ear into the sigmoid sinus -> internal jugular vein
Cavernous sinus
Hollow space behind the eye socket to drain blood. Blood clot can develop following facial or skull infection here
Between which layers is the venous sinuses located?
Between the endosteal and meningeal layers of the dura mater
Where is CSF drained into?
Venous sinuses
Where does Internal jugular vein return blood to?
Right brachiocephalic vein to the right side of the heart
Where does the sagittal sinus connect with other sinuses?
Via the confluence of sinuses, such as the transverse, superior and inferior petrosal sinuses
What is the falx cerebelli?
Fold of the dura mater which partially separates the cerebral hemispheres posteriorly
Foramen rotundum
Opening in the greater wing of the sphenoid bone which allows the maxillary nerve and trigeminal nerve to pass through
Foramen ovale
Transmits the mandibular nerve, trigeminal nerve and accessory meningeal artery
Optic canal
Foramen in the sphenoid bone which transmits the optic nerve and ophthalmic nerve
Jugular foramen
Opening in the temporal bone which transmits the internal jugular vein, vagus nerve,
glossopharyngeal nerve and spinal accessory nerve
Carotid canal
Opening in themporal bone superior to the jugular foramen which transmits the internal carotid artery, internal carotid venous plexus and sympathetic nerve plexus
Hypoglossal canal
Above the occipital condyle and transmits the hypoglossal nerve
Sella turcica
Depression of the sphenoid bone which contains the pituitary gland.
Boundaries of the sella turcica
Tuberculum sella, hypophysial fossa and dorsum sellae
Dorsum sellae
Bound to the sella turcica posteriorly
Hypophysial fossa
Centre of the sella turcica
Tuberculum sellae
Anterior portion of the sella turcica
What forms the roof of the infratemporal fossa?
Maxilla
What forms the sides of the infratemporal fossa?
Mandibular ramus and lateral pterygoid pate of the sphenoid bone
What forms the floor of the infratemporal fossa?
Mastoid process to styloid process
Foramen spinosum
Middle meningeal artery and meningeal branch of mandibular nerve
Anterior cerebral artery
Branch of this moves around the corpus allosum, called the pericallosal artery. Pericallosal artery gives a branch called the medial striate artery of Heubner.
Posterior cerebral artery
Supplies blood to splenium of the corpus callosum
Posterior cerebral artery
Supplies blood to splenium of the corpus callosum
Posterior cerebral artery
Supplies blood to splenium of the corpus callosum
Posterior cerebral artery
Supplies blood to splenium of the corpus callosum
