Anatomy CORTEX Flashcards
How many lobes in the brain?
6 lobes
Frontal, Parietal, Temporal, Occipital, Insula, Limbic
Border between frontal and parietal lobe?
Central sulcus
Border Frontal - temporal ?
Sylvian fissure
Anterior border of occipital lobe?
Parieto-occipital sulcus superiorly
Pre-occipital notch/incision inferiorly
Name the sulcus between the superior and inferior parietal lobule?
Intraparietal sulcus
Parietal lobe gyri on the lateral surface
Post central gyrus
Superior Parietal lobule
Inferior parietal lobule
Gyri of the inferior parietal lobule
Supramarginal gyrus
Angular gyrus
How does the pre-occipital notch look on CT/MR
Bone thickening and veins anteriorly
Name 3 lobes of the lateral surface of the occipital lobe
Superior, Middle, Inferior
Location of supramarginal gyrus
Inferior parietal lobule. Sits like a horseshoe on Sylvian fissure
Location of angular gyrus
Inferior parietal lobule.Sits like a horseshoe on Superior temporal sulcus
Paracentral lobule lobes
Anterior paracentral lobule frontal lobe
Posterior paracentral lobule parietal lobe
What is P1 called laterally and medial surface?
Convexity called Superior parietal lobule
Medial surface called Precuneus
Name the occipital lobes medial surface
Cuneus, Lingual gyrus seperated by calcarine sulcus
Inferior surface of temporal lobe
Inferior temporal/occipital gyrus
Lateral O-T gyrus (Fusiform)
Medial O-T gyrus (Parahippocampal + Lingual gyrus)
Parts of the Central Region
Precentral gyrus
Postcentral gyrus
Subcentral gyrus
Paracentral lobule
Motor strip
Precentral gyrus motor
Postcentral gyrus sensory
What are the cerebral landmarks to identify the central sulcus?
Axial 4 [ L, Knob, thickeness, Bracket]
Sagittal 3 [Medial Sagittal, Hook. Lateral sagittal]
At what level do you see the Hook of the precentral gyrus?
At the level of the insula
What is the pars bracket?
Pars marginalis = Ascending ramus of cingulate sulcus
Steps of the 3rd Sagittal Landmark?
Sylvian Fissure Anterior horizontal ramus Anterior ascending ramus Indicate Inferior frontal sulcus The M is the inferior frontal gyrus Precentral suclus Central sulcus
Parts of the M of inferior frontal gyrus
Pars orbitalis
Pars triangularis
Pars opercularis
Where is Broca’s area located?
Pars opercularis but variants Motor speech production
What is the importance of Heschl’s gyrus?
Primary auditory area
Landmarks of Heschl’s gyrus
Adhaesio interthalamica
Internal cerebral veins
Importance of calcarine sulcus?
Primary visual cortex around it
Cells type of primary visual cortex?
Visual stria of Genari (striate cortex)
Parts of Lazy Y
Parieto-occipital sulcus continues as anterior calcarine so calcarine sulcus meets them in the middle
What is interesting about the cytoarchitectonic variations?
They can be very variable but always on the structure that we describe (Broca’s, Heschl’s, Calcarine sulcus)
