pontine-doesn't persist, organize 4th ventricle & positions of alar and basal plates
What are the functional divisions of the cerebral cortex?
frontal-higher cognitive functions
parietal-spatial and navigation
temporal-auditory, speech, memory
What is the pathway of sensory information?
What are ependymal cells?
ventrcular surface, choroid(epithelial) plexus
What is the diff btwn oligodendrocytes and schwann?
oligo myelinate multiple
What are 2 ways to increase conductance speed?
axon diameter, insulation(myelination)
What are microglia?
resident macrophages in CNS
derived from blood monocytes
enlarge, proliferate, phagocytose and secrete cytokines from insults
What are the brain barrier systems?
1. Blood-brain: tight junctions of endothelial
2. Choroid cell: maintains CSF barrier
3. Arachnoid: maintains fluid barrier
4. Perineurial: surrounding peripheral nerves
Within the meninges where are the major vessels that supply the brain?
in the subarachnoid space, send capillaries to brain tissue that are monitored by ASTROCYTES
Astrocytes have foot processes that surround capillary
exchange occurs in capillary endothelial tight junction with itself
What are mengial extensions of peripheral nerves?
perineurium (around bundles of axons)
epineurium (around clusters of bundles)
What is the ventricular system of the CNS?
fluid filled cavities, lined with ependymal cells
choroid plexus: tissue made of choroid epithelium(single, cuboidal w microvilli & mitochondria)and stroma consisting of CT and vessels(fibroblasts, small arteries, venous sinuses, fenestrated capillaries), secretes CSF
plexus found in lateral ventricles, 3, 4th ventricles