Exam One Flashcards
Rostral
front and top
Caudal
back and bottom
3 major parts of the brain
Cerebrum
Cerebellum
Brainstem
Gyri
thick folds of brain
Sulci
shallow groves of brain
longitudinal fissure
divides brain into hemispheres
corpus callosum
thick bundle of never fibers that connect brain hemispheres
Grey Matter (location&function)
outside layer
forms surface layer over cerebrum and cerebellum and nuclei deep in brain
White matter (location&function)
deep to grey matter(inside)
sends signals
3 primary vesicles
forebrain
midbrain
hindbrain
forebrain into..
cerebral hemispheres
midbrain into…
stays midbrain
hindbrain into
pons and cerebellum
3 meninges and location
Dura Mater-pressed against cranial bone
Arachnoid- over brain surface
Pia mater- follows contours of brain
location of 4 internal chambers
2 lateral in each hemisphere
3rd beneath corpus callosum
4th between pons and cerebellum
Choroid plexus
spongy mass of blood capillaries on the floor of each ventricle
Functions of CSF
Buoyancy
Protection
Chemical Stability
Blood-Brain Barrier
regulates what substances can get from the bloodstream into the tissue fluid
BBB is highly permeable to…
H20, glucose,O2,CO2,alcohol, caffeine, nicotine, and anesthetics
4 regions of brainstem
LABLE
diencephalon
midbrain
pons
medulla oblongata
Reticular Formation
web of gray matter that runs vertically through all levels of the brain stem
5 Functions of Reticular Formation
Somatic Motor control Cardiovascular Control Pain modulation Sleep and consciousness Habituation
Cranial Nerves associated with Medulla Oblongata
IX,X,XI,XII
9,10,11,12
Cranial Nerves associated with Pons
V,VI,VII,VIII
5,6,7,8
Cerebellum
largest of hindbrain
left and right hemisphere
half+ brains neurons
Functions of cerebellum
muscle contractions and coordination
Evaluation of sensory input
timekeeping center
hearing