Flashcards in Chapter 15: Brain and Cranial Nerves Deck (84)
What are the 6 regions of the adult brain?
Describe the dura mater (3)
forms internal periosteum of skull
What are the three dura mater partitions? what does each separate?
Falx Cerebelli: separates right and left cerebellar hemispheres
Falx Cerebri: separates right and left cerebral hemispheres
Tentorium Cerebelli: separates lobes of cerebrum from cerebellum
describe the arachnoid mater (2)
-spreads over brain but doesn't extend into grooves and depressions
describe the pia mater (3)
-inner most mater
-aids in nourishing brain
-attached to surface of brain
what are ventricles? how many are there?
spaces filled with CSF; 4
Where are each of the 4 ventricles connected?
-2 lateral ventricles connected by interventricular foramen to the 3rd ventricle connected by cerebral aqueduct to the 4th ventricle connected to central canal of spinal cord
What are the functions are CSF? (3)
-Transport nutrients, wastes, and other chemicals
-Supports the brain
what is the location of CSF formation?
what is the choroid plexus?
what does it consist of?
lobes located in the ventricles
consists of ependymal cells and permeable capillaries
CSF is taken from ________ by________ cells and pooled in the ___________
blood; ependymal; ventricles
True or False: CSF moves entirely though out the CNS and PNS
false; only through the entire CNS not PNS
Where does CSF movement originate?
the CSF moves through ________ in the 4th ventricle to sub-arachnoid space
CSF moves though the _______ and around the _________
central canal; subarachnoid space
CSF is reabsorbed in the _________
describe the sagittal sinus (4)
-a large venous tube within the dura mater
-extends along the midline of the cerebral hemispheres
-arachnoid extends into sinus through arachnoid granulations
-CSF goes back to the blood
what are the five functions of the cerebrum?
-interpret sensory impulses
-voluntary muscular movements
-intelligence and personality
the two cerebral hemispheres are connected by the _______ and separated by the ________
what is the name for the ridges in the cerebrum?
other than connecting the two cerebral hemispheres, what else does the corpus callosum do?
allows for communication between the hemispheres
describe the hemisphere specialization for the two hemispheres of the cerebrum
one hemisphere receives sensory and generates motor information to the opposite side of the body of that hemisphere
describe cerebral gray matter (3)
-outer regions of cerebral lobes
-centralized in masses called basal nuclei
does the cerebral gray or white matter have myelinated axons?
what are the three fibers located in the cerebral white matter? describe them
Commissural fibers: connect corresponding gray areas on different hemispheres
Association fibers: connect different parts of same hemisphere
Projection fibers: connect cerebrum to lower brain areas
what are the 5 cerebral lobes
What is the sulci that separates the frontal lobe from the parietal lobe ?
what is the sulci that separates the parietal lobe from the temporal?
what is the sulci that separates the parietal lobe from the occipital?