Cerebral Hemisphere Flashcards
This is the deep midline sagittal fissure that separates the largest part of the brain
Longitudinal Cerebral Fissure
These are folds that increase the surface area of the cerebral cortex maximally
Gyri
These separated the folds of the cerebral cortex
Sulci or fissures
The deep cleft found mainly on the inferior and lateral surfaces of the cerebral hemisphere.
Lateral sulcus
Sylvian Fissure
An area of the cerebral cortex that lies at the bottom of the lateral sulcus and cannot be seen from the surface unless the lips of the sulcus are separated.
Insula
Island of Reil
This sulcus begins on the superior medial margin of the hemisphere about 5 cm anterior to the occipital pole.
Parieto-occipital sulcus
The parieto-occipital sulcus passes downward and anteriorly on the medial surface to meet the __________.
Calcarine sulcus
The calcarine sulcus commences under which specific part of a certain commissure fiber?
Posterior end of the corpus callosum
This lobe occupies the area anterior to the central sulcus and superior to the lateral sulcus.
Frontal lobe
What is the gyrus that lies between the precentral sulcus and central sulcus
Precentral gyrus
What are the 2 sulci that run anteriorly from the precentral sulcus?
Superior frontal sulcus
Inferior frontal sulcus
The parietal lobe extends posteriorly as far as the _______ sulcus
Parieto-occipital sulcus
The intraparietal sulcus commences from the middle of what sulcus to course posteriorly? A. calcarine sulcus B. precentral sulcus C. postcentral sulcus D. middle temporal sulcus
C. Postcentral sulcus
What structures are situated superior and inferior to to intraparietal sulcus?
Superior parietal lobule
Inferior parietal lobule
What lobe occupies the area inferior to the lateral sulcus?
Temporal lobe
Which gyrus is continued onto the inferior surface of the hemisphere?
Inferior temporal gyrus
The cingulate gyrus begins beneath the anterior end of the ________
Corpus callosum
The cingulate gyrus is separated from the corpus callosum by the ________
Callosal sulcus
The cingulate gyrus is separated from the _________ by the cingulate sulcus.
Superior frontal gyrus
Which of the following parts of the cerebral cortex encompasses both frontal and parietal lobes? A. paracentral lobule B. inferior parietal lobule C. occipitotemporal gyrus D. superior parietal lobule
A
An area of cortex bounded anteriorly by the upturned posterior end of the cingulate sulcus and posteriorly by the parieto-occipital sulcus.
Precuneus
A triangular area of cortex bounded above by the parieto-occipital sulcus, inferiorly by the calcarine sulcus, and posteriorly by the superior medial margin.
Cuneus
This sulcus is situated on the inferior surface of the hemisphere and courses anterior below the calcarine sulcus.
Collateral sulcus
What gyrus is situated between the collateral sulcus and the calcarine sulcus
Lingual gyrus
Anterior to the lingual gyrus is the __________ gyrus; the latter terminates in front as the hooklike _________
parahippocampal
uncus
Which sulci serve as the medial boundaries of the medial occipitotemporal gyrus?
Collateral sulcus and
Rhinal sulcus
The __________ gyrus lies lateral to the occipitotemporal sulcus and is continuous with the_________ gyrus.
lateral occipitotemporal;
inferior temporal
What structures overlie the olfactory sulcus on the inferior surface of the frontal lobe
Olfactory bulb and tract
The gyri lateral to the olfactory sulcus is which of the following? A. visual gyri B. orbital gyri C. auditory gyri D. olfactory gyri
B
Give the commissural structures of the cerebrum
Corpus Callosum
Anterior and posterior commissure
Fornix
Habenular commissure
Give the commissural structures of the cerebrum
Corpus Callosum
Anterior and posterior commissure
Fornix
Habenular commissure
Parts of the corpus callosum
Rostrum
Genu
Body
Splenium
Traced laterally, the fibers of the genu curve forward into the frontal lobes and form the _______.
forceps minor
The fibers of the body extend laterally as the ________ of the corpus callosum.
radiation
The forceps major arises from which part of the corpus callosum? A. septum pellucidum B. splenium C. rostrum D. body
B
These fibers connect various cortical regions within the same hemisphere
Association fibers
These fibers course transversely to the long axis of the sulci and connect adjacent gyri immediately beneath the cortex
Short association fibers
These are long association fibers which connects the occipital lobe to the temporal lobe.
Inferior longitudinal fasciculus
Projection fibers are afferent and efferent nerve fibers passing to and from the ________ to the entire cerebral cortex that must travel between large nuclear masses of gray matter within the cerebral hemisphere.
Brainstem
The internal capsule, projection fibers, superiorly becomes which of the following? A. superior longitudinal fasciculus B. inferior longitudinal fasciculus C. external capsule D. corona radiata
D
