Histology Of CNS - Olinger 3/21 Flashcards
Where are pseudounipolar neurons found?
Sensory ganglia of cranial and spinal nerves
What are the types of multipolar neurons?
Located where?
Pyramidal and Purkinje
Cerebral cortex (pyramidal) Cerebellar cortex (Purkinje)
What are the layers of the cerebral cortex from outer to inner?
Molecular External granular External pyramidal cell Internal granular Internal pyramidal cell Multiform White matter
Describe cerebellar organization from outer to inner:
Molecular layer
Purkinje layer
Granular Layer
white matter
Miles Per Gallon
What is contained in the dendritic shaft?
Dendritic spine?
Microtubules
Actin filaments
Function of astrocyte?
Located where?
What special feature does it have?
Maintain blood-brain barrier
CNS
End-feet covering neurons, inner PKA, and every blood vessel of CNS
What are the main components of the blood-brain barrier?
What additional components?
Tight junctions
Basal lamina of endothelial capillaries
Astrocyte end-feet
In the CNS, the surface of the node is contacted by what?
In PNS, node covered by what?
Astrocyte processes
Schwann cell processes
Describe features of oligodendrocytes
Provides myelination to several axons in CNS
NO supporting CT
NO basal lamina
What is a microglial cell?
Macrophage in the CNS
Like a monocytes
What produces CSF?
Choroidal epithelial cells (choroid plexus)
What is characteristic of ependymal epithelium?
Linked by what?
Cilia and Microvilli
Desmosomes
Tanocytes are located where?
What do they have?
Linked by what?
3rd ventricle
End-feet that extend through the astrocytes to blood vessels
Tight junctions
What is the central canal lined by?
Ependymal cells ONLY
What is the choroid plexus?
Located where?
Ependyma wrapped around fenestrated blood vessels
Lateral ventricles
