Gross Topography Flashcards
What is the average weight of the human brain?
1400g
What are the areas where the 2 layers of dura are NOT adherent to each other?
Dural venous sinuses
What are the 3 major reflections of the dura mater?
- Falx cerebri
- Tentorium cerebelli
- Falx cerebelli
What are the two veins that form the internal cerebral vein?
What are the two veins that unite to form the Vein of Galen?
What two veins unite to form the Straight Sinus?
- Terminal vein (Thalamostriate v.)
- Septal v.
- Internal cerebral vein
- Basal vein of Rosenthal
- Vein of Galen
- Inferior sagittal sinus
What venous sinus
- Extends between the clivus and the petrous bone
- Lies in the dura at the anterior borders of the tentorium cerebelli
- Lies on each side of the sphenoid sinus, sella and pituitary gland
- Inferior petrosal sinus
- Superior petrosal sinus
- Cavernous sinus
Which frontal gyrus
- Frontal eye fields
- Broca’s area
- Middle frontal gyrus
2. Inferior frontal gyrus: triangular gyrus and adjacent opercular gyrus
What are the inferior parietal lobes divided into?
Supramarginal gyrus that caps the end of the lateral sylvian fissure
Angular gyrus that caps of the end of the superior temporal sulcus
Which temporal gyrus contains the Wernicke’s area and transverse temporal gyri of Heschl?
Superior temporal gyrus On its dorsal bank contains the TGH. Behind the TGH is the wenicke’s area
The TGH is more anterior to the Wernicke’s
What are the 4 parts of the corpus callosum?
Head (Rostrum), Genu, Body, Splenium,
On the medial side– above the cingulate gyrus what structure is formed by the medial extensions of the precentral and postcentral gyri?
Paracentral lobule
What physical and functional structures straddle the calcarine sulcus of the medial occipital lobe?
Superior dorsal cuneus gyrus
Ventral lingual gyrus
The visual cortex straddles the CS on both sides
What is the C-shaped structure that is immediately in the inferior border of the septum pellucidum?
Fornix– connects the hippocampi and the diencephalon
What is at the anterior extent of the fornix? A structure that plays a role interhemispheric transfer of visual information?
Anterior commissure
Anterior limb for olfaction
Posterior limb for visual and auditory functions
What constitutes the epithalamus?
- Stria medullaris thalami
- Habenular nuclei
- Pineal gland
The collateral sulcus separates which two gyri?
Superior: Parahippocampal gyri
Inferior: Fusiform gyri or the occipitotemporal gyri
What 5 parts of the limbic lobe are in the medial surface of the brain?
Cingulate gyrus Subcallosal gyrus Parahippocampal gyrus Uncus Fusiform gyrus
Identify the components
- Corpus striatum
- Striatum
- Lenticular nucleus
- Corpus striatum: Caudate, Putamen, Globus pallidus
- Striatum: Caudate putamen
- Lenticular nucleus: Putamena and globus
What gyri are on the sides of the olfactory bulb and tracts?
What structure whre blood vessels pass is at the caudal end of the tracts?
Gyrus rectus medially and orbital gyrus laterally
Anterior perforated substance
CN3 arises between?
Posterior communicating artery
Superior cerebellar artery
What are CN that arise paramedian?
CN4
CN6
CN12
What separates the thalamus to the basal ganglia?
What connects it?
Posterior limb of the internal capsule
Ansa lenticularis
What is the proper order from superior to inferior?
Paracentral lobule Cingulate gyrus Corpus callosum Subcallosal gyrus (anterior to septum pellucidum) Septum pellucidum Fornix Stria medullaris thalami Stria terminalis
This is the proper order!
