Case 3 Anatomy Flashcards
Learning anatomy for case 3
the skull is comprised of the ___ and the ___
Neurocranium and the viscerocranium
The neurocranisum is the ___
bony covering of the brain and meninges
The viscerocranium is the
facial skelton + mandible
The coronal suture joins the
Frontal and 2 parietal bones
The sagittal suture joins the
2 parietal bones
The Bregma is the ___
Joining of the coronal and sagittal sutures
The lambdad joins which 3 bones?
Parietal, temporal and occipital bones
What is the superior nuchal line
The surface attachment of tentorium cerebrelli
What is the external occipital protuberance
Attachment of the nuchal ligament
Name the boundaries of the temporal fossa
Posteiro: super and inf temproal lines
Anterior : frontal and zygomatic bones
Inferior: zygomatic arch
What opens into the temporal fossa
External acoustic meatus and mastoid process
What is the pterion
Intersecion of the frontal, parietal, temporal and sphenoid bones
What are the 2 layers of the dura mater?
External endosteal and internal meningeal layer
What is another name for the periosteum of the neurocranium?
External endosteal dural layer
What does the arachnoid mater form?
Blood arachnoid barrier
What o the arachnoid villi project into?
Dural venous sinus
What is housed within the sub-arachnoid space?
The CSF
What are the arachnoid trabecular?
Fine extension to link the arachnoid and pia mater
The blood supply to the periosteal dura mater is from the ___, whereas the internal meningeal later is supplied by the ___
Adjacent bone
Middle meningeal artery +/- occipital, ant ethmoidal
What 3 nerves innervate the dura mater?
Ophthalmic, Maxillar and Mandibular division of CNV
What part of the dura mater is innervated by the vagus nerve?
Posterior fossa cranial floow
What is the location of the falx cerebri?
Midline of 2 cerebral hemispheres (longitudinal tissue); from frontal crest at crest galli to internal occipital protuberance
Where is the free margin of the falx cerebri?
Above the corpus callosum
The tentoriu cerebelli separates the ___ lobe from the ___
Occipital lobe from the cerebellum
The diaghramga sella will surround which important structure?
Pituitary gland
The falx cerebelli is located between what 2 structures
The 2 cerebellar hemispheres
The superior sagittal sinus is located between the layers of what dura mater?
Falx cerebri
What will the superior sagittal sinus become?
The transverse sinus
Where does the inferior sagittal sinus begin and where does it run?
Begins at crista galli and runs between the free margins of falx cerebri
The straight sinus connects what to sinuses?
Transverse and infeiror sagittal sinus
Outline the path of the transverse sinus
Begins at internal occipital protuberance, runs horizontally and at temporal one junction, turns downwards to form sigmoid sinus
The sigmoid sinus will run through what structure prior to forming got the IJV?
Jugular Foramen
What are the relations of the Anterior, posterior and inferior horns of the lateral ventricles?
Anterior : inf = caudate nucleus, sup = corpus callosum
Postioer = occipital lobe
Infeiorn = amygdala, hippocampus
What structure connects the fourth and third ventricles?
Interventricular foramen
Which ventricle is located between the thalami?
Third Ventricle
Where does the cerebral aqueduct lead?
To the fourth ventricle
Where is th fourth ventricle located?
Posterior to the pons
What are the cranial and caudal boders of th fourth ventricle?
cranial border = sup cerebellar peduncles
caudal border = inf cerebellar peduncles
What will the fourth ventricle open into?
2 lateral and 1 medial foramen
What cells form the CSF?
Ependymal cells of the choroid plexus
Where is the CSF formed?
Inf horn of lat ventricles, IV foramen and third ventricle
Define hydrocephalus
Abnormal increase in CSF within the skull
Whilst Non-communicating hydrocephalus is characterised by an obstruction of CSF ___, communicating hydrocephalus is characterised by an obstruction of CSF___.
CSF flow
CSF reabsorption
Non-communicating hydrocephalus typically shows compensatory ___ ___
Brain atrophy (look in gyri, ventricular size
