CT MIDTERM: HEAD
What is the innermost cerebrum made of?
(centrum semiovale) white matter with pockets of gray
gyrus
(convolutions) fold between the grooves of the cerebrum
What is the outermost cerebrum made of?
(cortex) gray matter
What separates the frontal from the parietal lobe?
Central fissure
Where is "white matter" located on axial images?
Centrally
What is the largest of the three parts of the hindbrain?
Cerebellum
Where is the Genu of corpus callosum? the Splenium of corpus callosum?
Genu is anterior; Splenium is posterior (behind lateral ventricle
Basal Ganglia
One of 4 masses of gray matter located deep in the cerebrum
What are the components of the Hindbrain?
Pons, medulla oblongata, and cerebellum
Septum Pellucidum
Thin trianglular sheet, under the corpus callosum, above the fornix, that seperates the lateral anterior horns of the ventricles
What do the two hemispheres of the cerebellum communicate through?
Vermis
Circle of Wilis
arterial anastomosis formed by internal carotid arteries, posterior cerebral arteries, anterior cerebral arteries, posterior communicating arteries, and anterior communicating artery
Corpus Striatum
basal ganglia compsed of caudate and lentiform nuclei
foramina of Luschka
bilateral opening from the fourth ventricle, which connects it with the subarachnoid space
vermis
bridge connecting the right and left cerebellar hemispheres
Ventricles
cavities in the brain filled with cerebrospinal fluid that communicate with each other, with the central canal of the spinal cord, and subarachnoid space
insula
central lobe of the cerebrum
What passes through the midbrain?
cerebral aqueduct
What do the two hemispheres communicate through?
corpus callosum
Three main components of the brain
forebrain, midbrain, hindbrain
Each hemisphere has 5 lobes. What are they?
frontal, parietal, occipital, temoral, and central
What is the hypothalamus connected to the pituitary gland by?
infundibulum
Where is the lateral ventricle from the third ventricle on an axial scan?
lateral is on top (anterior) and third is posterior (bottom)
What separates the frontal, parietal, and temporal lobes?
lateral/sylvian fissure
What seperates the two hemispheres of the cerebrum?
longitudinal fissure
Foramen of Megendie
median opening of the fourth ventricle, which drains cerebrospinal fluid into the central canal of the spinal cord and the subarachnoid space
What is the brain stem made of?
midbrain, pons, and medulla
Cerebral aqueduct
passageway connecting the third and fourth ventricles of the brain
Interventricular foramen/foramen of monroe
point of communication between lateral ventricles and the third ventricle
Corpus Callosum
portion of the brain composed of white matter connecting the 2 hemisphere's of the cerebrum
What is the midbrain composed of?
punducles (anteriorly) & quadrigeminal plate (posteriorly)
tectum
quadrigeminal plate
sulci
shallow grooves of the cerebrum
septum pellucidum
sheet of nervous tissue separating the two lateral ventricles
Diploe
spongy bone found between 2 layers of compact bone in the skull
What is the Diencephalon composed of?
thalamus, hypothalamus
What separates the cerebrum from the cerebellum?
transverse fissure
caudate nucleus is located where in the brain?
under the ventricles (part of the 4 baisal ganglia)
Centrum semiovale is also known as?
white matter
fornix
white matter that forms the floor of the lateral ventricles