Neuro!!!! - Anatomy and Physiology Flashcards
Origin of CNS neurons
Neuroectoderm
Origin of ependymal cells
Neuroectoderm
Origin of oligodendroglia
Neuroectoderm
Origin of astrocytes
Neuroectoderm
Origin of PNS neurons
NCC
Origin of Schwann cells
NCC
Origin of Microglia
Mesoderm
Cell bodies and dendrites can be stained via what to stain the RER
Nissl substance
Wallerian degeneration
When an axon is injured and it degenerates distal to the injury and axonal retraction proximally, allowing for potential regeneration of axon if in PNS
Cell for physcial support, repair, K+ metabolism, removal of excess NT, maintenance of BBB.
Astrocytes
Undergoes reactive gliosis (scar tissue in CNS) in response to injury
Astrocytes
Marker is GFAP (seen in glioblastoma multiforme)
Astrocytes
CNS pahgocytes of mesodermal origin that are not readily discernible in Nissl stains.
Microglia
When infected with HIV they fuse to form multinucleated giant cells in CNS
Microglia
Make the myelin in the CNS
oligodendrocytes
Make the myelin in the PNS
Schwann cells
Myelinate many axons at one time
Oligodendrocytes
Damaged in MS
Oligodendrocytes
Myelinates one axon at a time
Schwann cells
Damaged in Guillain Barre Syndrome
Schwann cells
Associated with acousitc neuroma, and NF-2
Schwann cells
Looks like fried eggs on H&E staining
Oligodendrocytes
Slow, unmyelinated fibers in skin, epidermis, and some viscera that sense pain and temp
C - fibers - free nerve endings
Fast, myelinated fibers in skin, epidermis, and some viscera that sense pain and temp
Adelta - fibers - free nerve endings
Large myelinated fibers taht adapt quickly, found in glabrous hairless skin and sense dynamic, fine/light touch; position sense
Meissner’s corpuscles
Large, myelinated fibers in deep skin layers, ligaments, and joints that sense vibration and position
Pacinian corpuscles
Large, myelinated fibers; adapt slowly in hair follicles, sense pressure, deep static touch (shapes, edges), and position sense
Merkel’s discs
3 layers of a peripheral nerve
endoneurium, perineurium, epineurium
The layer of the peripheral nerve with inflammatory infiltrate in Guillain Barre
Endoneurium
The permeability barrier that surrounds a fascicle of nerve fibers
Perineurium
The dense CT that surrounds the fasciles and blood vessles, keeping the nerve together
Epineurium
Level of NE in anxiety
INCREASED
Level of NE in depression
DECREASED
LEvel of NE in mania
INCREASED
Level of DA in schizophrenia
INCREASED