Cererbrum into Flashcards
The cerebrum is derived embryologically from?
The telencephalon
The cerebrum is the
largest part of the forebrain which reaches the greatest degree of development in the human brain
The cerebral cortex is located ________
superficially
The cerebral cortex is located superficially and consists of
cortical grey matter (i.e. nerve cell bodies) that is highly convoluted to form a complex pattern of ridges (gyri; singular, gyrus) and furrows (sulci; singular, sulcus)
The subcortical grey matter is located within the
White matter
The subcortical grey matter is located within the white matter and consists of the
thalamus and basal ganglia
The cerebral white matter is located deep to the cortex and consists of
nerve fibers (axons)
Most of the nerve fibres running between the cortex and subcortical structures are condensed, deep within the hemisphere, into a
broad sheet, the internal capsule
Between the internal capsule and the cortical surface, fibres radiate in and out, to produce a
fan-like arrangement, the corona radiata
The cerebrum houses the _________ ventricles
Lateral ventricles
Two hemispheres are separated by the
longitudinal fissure
Corpus callosum is located in the depths of the fissure and is an enormous sheet of commissural nerve fibres which run between corresponding areas of the two cortices
Name the three surfaces of the cortex
- Superolateral
- Medial
- Inferior
Name the three borders of the cortex
- Superomedial
- Inferolateral
- Inferomedial
Name the lobes
The lateral fissure:
Separates the temporal lope from the frontal and parietal lobes
What is found deep to the lateral fissure
The insula
The parts of the frontal, parietal and temporal lobes overlying the insula
= the operculum
A single, uninterrupted sulcus that extends from the medial longitudinal fissure (superiorly) to the lateral fissure (inferiorly)
= central sulcus
The central sulcus also extends (for a very short distance) onto the medial surface of the hemispheres – within the longitudinal fissure
What is found within the precentral gyrus
Primary motor region of the cortex
What is found in the postcentral gyrus
primary somatosensory cortex
Intraparietal sulcus divides the parietal lobe into
a superior and inferior parietal lobule
What is located within the superior temporal gyrus
The primary auditory cortex
Location of the primary visual cortex
Calcarine sulcus
Cingulate sulcus course and location
curves around the corpus callosum and runs parallel to it
It passes posteriorly and inferiorly around the posterior surface of splenium of the corpus callosum, it then becomes continuous with the parahippocampal gyrus
Parahippocampal sulcus location
lies deep to the parahippocampal gyrus within the temporal lobe
The parahippocampal sulcus is formed by
the in-curling of the inferior medial part of the temporal lobe
The limbic lobe consists of the
Cingulate gyrus
parahippocampal gyrus
hippocampus
The insula lies deep to the
lateral fissure
Heschl’s convolutions indicate the
functional localization of the primary auditory cortex