Week 1 - DRY Flashcards
Draw and label the circle of Willis
Check against diagram in anatomy book, page 98
From which arteries do the left & right vertebral arteries arise?
Subclavian
At what vertebral level do the left & right internal carotid arteries arise?
C4
How is the basilar artery formed and which part of the brainstem is it most closely related to?
Union of L + R vertebral arteries
Pons
Which arteries complete the posterior of the Circle of Willis by linking the internal carotid arteries to the posterior cerebral arteries?
Posterior communicating
Which artery completes the anterior of the Circle of Willis by linking the anterior cerebral arteries?
Anterior communicating
In which fissure of the brain does the anterior cerebral artery travel?
Median Longitudinal Fissure
In which fissure of the brain does the middle cerebral artery travel in?
Lateral sulcus
In which fissure of the brain does the posterior cerebral artery travel?
Parieto-occipital
Which cerebral artery supplies:
1) Primary motor cortex
2) Primary Sensory Area
3) Primary visual area
4) Primary auditory area
5) Area for olfaction
1) Middle
2) Middle
3) Posterior
4) Middle
5) Middle
Which parts of the brain does the vertebro-basilar system supply?
Brainstem and cerebellum
Which cranial nerve emerges from just above the superior cerebellar artery?
III
Label the main dural venous sinuses of the brain.
Into which vein in the neck do these dural venous sinuses drain into?
Internal Jugular
Through which foramen in the skull does the IJV pass?
Jugular foramen
The opthalmic veins drain into what venous sinus?
Cavernous sinus
What structures in the skull base is the cavernous sinus closely related to?
Pituitary gland
Branches from which arteries fuse to form the anterior spinal artery?
Vertebral
Which arteries are the posterior spinal arteries branches of?
Vertebral (correct)
What fluid circulates in the subarachnoid space?
CSF
Which structures does the falx cerebri separate?
The cerebral hemispheres
To what bony structures does the falx cerebri attach anteriorly?
Crista Galli
Frontal crest processes
Which dural venous sinus runs within the upper border of the falx cerebri?
Superior saggital sinus
Which dural venous sinus runs along the lower border of the falx cerebri?
Inferior saggital sinus
What structures lie on either side of the tentorium cerebelli?
https://en.wikipedia.org/wiki/Cerebellar_tentorium
Cerebellum
Cerebrum (inferior aspect of occipital lobe)
To what bony points does the anterior edge of the tentorium cerebelli attach to?
Clinoid processes of sphenoid
Which dural venous sinus runs along the attachment of the falx cerebri to the tentorium?
Straight sinus
What is the dural fold that separates the two cerebellar hemispheres called?
Falx cerebelli
What is the fold of dura that surrounds the pituitary stalk called?
Diaphragmae sellae
Through which foramen in the skull does the middle meningeal artery enter the cranial cavity?
Foramen spinosum
Which artery is the maxillary artery a terminal branch of and within which glandular structure is it give off?
External carotid
Parotid gland
What embryological structures are the brain ventricles formed from?
Neural tube
What name is given to the specialised structures that lie in the ventricles that generate CSF?
Choroid plexus
How does CSF pass into the subarachnoid space from the 4th ventricle?
Median aperture - foramen of Magendie (1)
Lateral apertures - foramen of Luschka (2)
How is CSF finally resorbed back into the general circulation?
Arachnoid granulations contain small arachnoid villi that re-absorb CSF into the superior saggital sinus
On a bony skull cap identify the groove for the superior sagittal sinus. Identify indentations on either side of this groove. What makes these indentations?
Arachnoid villi?
