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Block 6-Neuro

Block 6 Neuro - Telencephalon extenal features

QuestionAnswer
Where is a sagittal fold of dura mater found? What is another name for this structure? falx cerebri is in the longitudinal (cerebral) fissure between the right and left cerebral hemispheres
A large mass of commissural fibers connect what at the bottom of the longitudinal fissure? the Corpus callosum connects the cortical areas of both cerebral hemispheres
What three components of the telencephalon make it resemble an almond joy? The chocolate = cerebral cortex the coconut = subcortical white matter The almond = basal nuclei
What does the cerbral cortex form? superficial layer of gray matter that forms ridges (gyri) and grooves (sulci)
What are the fibers that make up the subcortical white matter? axons the run to and from the cerebral cortex
What are found within the fibers of the subcortical white matter? masses of gray matter = basal nuclei
What is the cavity inside each cerebral hemisphere? lateral ventricle
What is the shape of the superolateral surface of the cerebral hemisphere? Why? convex to conform to the concavity of the cranial vault (calvaria)
What is the shape of the medial surface of the cerebreal hemisphere? flat and vertical, faces the opposite hemisphere with longitudinal fissure in between it.
What does the inferior surface rest on? anterior and middle cranial fossae and tentorium cerebelli
What is the tentorium cerebelli? the fold of dura matter between cerebral hemispheres and cerebellum
Name the six lobes of the cerebral hemisphere: frontal, parietal, temporal, occipital, insular, limbic
What direction does the fissure of sylvius run? Other name? What does it separate? lateral sulcus runs posteriorly and superiorly on superolateral surface to separate the temporal lobe from the frontal and parietal lobe.
What sulcus marks the boundary between frontal and parietal lobes (anterior and posterior respectively? The suclus that runs inferiorly and slightly anteriorly from superior border of hemisphere and extends for short distance onto medial surface.
What sulcus runs inferiorly and slightly anteriorly from superior border of hemisphere to fissure of sylvius? Fissure of Rolanda or central sulcus
The sulcus located on medial surface of hemisphere between parietal and occipital lobe? sulcus tha extends for short distance onto superolateral surface. Parietooccipital
Where is the preoccipital notch? What causes it? Indentation on the inferior border of hemisphere produced by superior border of petrous part of temporal bone
Where is the boundary between parietal, temporal and occipital lobes? imaginary line connecting parietooccipital sulcus with preoccipital notch
Where are the frontal and occipital poles? anterior and posterior ends of cerebral hemisphere
Where is the temporal pole? anterior end of temporal lobe
Where is the insula? cortical area located deep inside lateral suclus
What makes up the opercula? parts of frontal, parietal and temporal lobes that overlie the insula
The precental sulcus likes anterior and pararllel to what suclus central sulcus
What lies between precentral sulcus and central sulcus? What does it do? precentral gyrus is part of primary motor cortex - very important
What three parts of the superolateral surface of the frontal lobe are divided by superior and inferior sulci superior, middle, inferior frontal gyri
The gyrus lateral to the inferior sucli has what three parts? orbital, triangular and opercular parts divided by anterior and ascending rami of lateral sulcus
The postcentral suclus is part of what lobe? Where does it run? runs posterior to postcentral gyrus , parallel to the central sulcus in the parietal lobe
The gyrus that is part of primary somatosensory cortex is where? Name? parietal lobe: located between central suclus and postcentral sulcus, name: postcentral gyrus
Where do all pain, temp, proprioception for cerebral cortex go to... postcentral gyrus
What is the sulcus that runs posteriorly from the postcentral sulcus? What does it divide? intraparietal sulcus divides the remaining part of parietal lobe into superior and inferior parietal lobules
What inferior parietal gyrus caps the posterior end of the lateral sulcus? supramarginal gyrus
What inferior parietal gyurs caps the posterior end of the superior temporal sulcus? angular gyrus
Name the three gyri and two sulci of the temporal lobe: superior, middle, and inferior gyri divided by superior and inferior sulci
If you look on the superior surface of the temporal lobe (which is the floor of the lateral sulcus, what area gyri exist? the gyri that corresponds with primary auditory cortex = transverse temporal gyri
Which lobe has no important sulci or gyri? occipital lobe
What is the name of the area in which the inferior surface of hemisphere is continuous with insular cortex? limen insulae (threshold to insuala)
What lobe has short anterior gyri and long posterior gyri divided by a central sulcus Insular Lobe
What is the largest bundle of commissural fibers? Fibers that establish connections between cortical areas of both cerebral hemispheres. = corpus callosum
List the parts of the medial surface of the corpus callosum from anterior to posterior rostrum, genu, body, splenium
part that is continuous inferiorly with lamina of terminalis forms part of anterior wall of 3rd ventricle Rostrum
fiber bundle connecting hippocampal formation with hypothalmus oldest part of cerebral cortex located in medial part of temporal lobe, most fibers terminate in mammillary body = fornix
columns of fornix form what anterior boundary of interventricular foramen
thin sheet of neuroglial tissue with scattered neurons that fill gap between fornix and corpus callosum septum pellucidum
smaller bundle of commissural fibers located anterior to column of fornix interconnects parts of frontal and temporal lobes
What sulcus begins inferior to the genu of the corpus callosum and runs parallel to it? The sulcus tha turns up posteriorly toward the superior border of the hemisphere to become the marginal sulcus = begins as..cingulate sulcus
The gyri continues above the corpus callosum as far back as the splenium... begins inferior to the genu of the corpus callosum = cingulate gyrus
What gyrus is located between cingulate sulcus and corpus callosum cingulate gyrus is
Name the three gyri and two sulci of the temporal lobe: superior, middle, and inferior gyri divided by superior and inferior sucli
If you look on the superior surface of the temporal lobe (which is the floor of the lateral sulcus, what area gyri exist? the gyri that corresponds with primary auditory cortex = transverse temporal gyri
Which lobe has no important sulci or gyri? occipital lobe
What is the name of the area in which the inferior surface of hemisphere is continuous with insular cortex? limen insulae (threshold to insuala)
What lobe has short anterior gyri and long posterior gyri divided by a central sulcus Insular Lobe
What is the largest bundle of commissural fibers? Fibers that establish connections between cortical areas of both cerebral hemispheres corpus callosum
List the parts of the medial surface of the brain from anterior to posterior rostrum, genu, body, splenium
part that is continuous inferiorly with lamina of terminalis forms part of anterior wall of 3rd ventricle Rostrum
fiber bundle connecting hippocampal formation with hypothalmus oldest part of cerebral cortex located in medial part of temporal lobe, most fibers terminate in mammillary body fornix
columns of fornix form what anterior boundary of interventricular foramen
thin sheet of neuroglial tissue with scattered neurons that fill gap between fornix and corpus callosum septum pellucidum
smaller bundle of commissural fibers located anterior to column of fornix interconnects parts of frontal and temporal lobes
What sulcus begins inferior to the genu of the corpus callosum and runs parallel to it? The sulcus tha turns up posteriorly toward the superior border of the hemisphere to become the marginal sulcus begins as..cingulate sulcus
The gyri continues above the corpus callosum as far back as the splenium... begins inferior to the genu of the corpus callosum cingulate gyrus
What gyrus is located between cingulate sulcus and corpus callosum cingulate gyrus is anterior to corpus callosum and posteriot ot cingulate sulchus
what gyrus if continuous with superior frontal gyrus on superolateral surface? gyrus located between cingulate sulcus and border of hemisphere = medial frontal gyrus
area located anterior to marginal sulcus and posterior to paracentral sulcus surrounds the indentation produced by central sulcus on medial surface of hemisphere = paracentral lobule
represents an extension of precentral gyrus onto media surface of hemisphere it is part of primary motor cortex = anterior paracentral lobule (gyrus)
represents an extension of postcentral gyrus onto medial surface of hemisphere it is party of primary somatosensory cortex = posterior paracentral lobule (gyrus)
located inferior to rostrum of corpus callosum and anterior to lamina terminalis subcallosal gyrus
what begins under the splenium of the corpus callosum and extends toward the occipital pole sulcus that has primary visual cortex in the depths and on either side of it.= calcarine sulcus
what sulcus extends from calcarine sulcus to the superior border of hemisphere? parietooccipital sulcus
located between marginal sulcus and parietooccipital sulcus area limited inferiorly by subparietal sulcus = precuneous
wedgeshaped area between parieto-occipital and calcarine sulci cuneus
Where is the tongue of the brain? located inferior to the calcarine sulcus = lingual gyrus
What lies parallel and lateral to the longitudinal fissure? olfactory sulcus
The structure that sits just superior to cribiform plate of ethmoid structure that recieves olfactory nerves = olfactory bulb
posterior continuation of olfactory bulb terminates posteriorly by dividing into medial and lateral olfactory striae = olfactory tract
posterior to the olfactory striae is an area with numerous small orifices produced by vessels as they enter the brain anterior perforated substance
gyrus located medial to olfactory suclus straight gyrus
where are the orbital gyri and sulci lateral to olfactory sulcus on inferior surface of frontal lobe
sulcus that runs along the medial border of temporal lobe, on the inferior surface hippocampal sulcus
What lies lateral and parallel to hippocampal sulcus on inferior surface of temporal lobe collateral sulcus
Its anterior most portion hooks to form the uncus? the gyrus that lies between lateral to hippocampal sulcus and medial to anterior part of collateral sulcus = parahippocampal sulcus
short sulcus that forms the lateral boundary of the most anterior part of parahippocampal gyrus may be continous with collateral sulcus = rhinal sulcus
gyrus located between calcarine sulcus and posterior part of collateral sulcus lingual gyrus
list the 3 structures in order that are lateral to the collateral sulcus medial occipitotemporal gyrus occipitotemporal sulcus lateral occipitotemporal gyrus
What gyrus on the inferior surface of the temporal lobe becomes continous with the inferior temporal gyrus around the inferior border of the hemisphere lateral occipitotemporal gyrus
What lobe is involved with higher brain function such as memory and emotions? limbic system - looks like ring, hence limbic
Where is the limbic lobe? What does it border? medial and inferior surfaces of hemisphere, bording corpus callosum and upper brainstem
Four components of limbic lobe subcallosal gyrus (area) cinglute gyrus parahippocampal gyrus with uncus hippocampal formation (seahorse)
What connects the cingulate and parahippocampal gyri? Where? isthmus of cingulate gyrus posterior to spenium of corpus callosum
Created by: El Diablo