CHAPTER 14 Flashcards
Name the subdivision and function of the cerebrum, and anything that’s in that division
-Subdivision- forebrain
-functions- cognition, language, memory
Name the subdivision and function of the diencephalon, and anything that’s in that division
Subdivision- forebrain
other divisions:
hypothalamus- control center , relay station
thalamus- control center, relay station
epithalamus-pineal gland-melatonin
Name the subdivision and function of the Brainstem, and anything that’s in that division
midbrain- mesencephalon - reflexes
pons-hindbrain-control center
medulla-hindbrain-control center
Name the subdivision and function of the Cerebellum, and it’s motor and outer input
subdivision- hindbrain
-functions- coordination
Motor input: muscles, joints, spinal cord, ear, eye,
Motor output- cerebrum to brainstem, spinal cord, limbs
Directional terms and anatomical features
Directional-
Rostral- toward forehead
Caudal- toward spinal cord
Anatomical-
longitudinal fissure- down middle
gyri- bump on brain
sulci-divots
corpus callosum- nerve bundle at connecting the hemisphere
Gray matter
-darker colour due to demyelination in tissue
-surface layer over cerebrum and cerebellum
-contains cells, dendrites, and synapses
white matter
-white colour due to myelination
-called tracts in CNS, nerves in PNS
-superficial to gray matter
meninges: the three membranes surrounding the brain and spinal cord
-dura mater- outer- presses against cranial bones, tough
- outer periosteal layer
-inner meningeal layer
- (two layers separated by dural
sinuses)
-arachnoid mater- middle, CSF, spider
-pia mater- thin, BBB
meningitis
-inflammation of meninges
-serious disease of young children
-swelling of brain, stiff neck
-affects arachnoid and pia mater the most
Name all ventricles in the brain
four fluid filled chambers in the brain with CSF
-two lateral
-third
-fourth
ventricles are connected by
-interventricular foramen- pore that connect lat to third
-cerebral aqueduct- tube connecting third to fourth
central canal- tube connecting forth to spinal cord
CSF and its function
-clearliquid
-baths the brain and fills ventricles
-allows brain to attain size (can’t have too much or too little
-protects brain from jolting movement
-chemical stability- CSF rinses away wastes and regulates chem environment
Filtration system of CSF
FS:
-filtration of blood plasma through capillaries of the brain
-pass through ventricles (3rd and 4th add more CSF along the way)
-CSF leaves ventricles into subarachnoid space
-CSf reabsorbed by arachnoid granulations
at the blood capillaries, the brain is protected by
BBB
blood brain barrier and functions
-tight junctions between endothelial cells that form capillary walls
-astrocytes (neuroglia) - controls how tight the junction is
Choroid plexus and functions
CSF barrier
-special capillaries
-tight junctions between ependymal