Neurohistology Flashcards
Students will be asked to rotate between stations and identify photos or histological sections
Astrocytes
Star-shaped cells that play an active role in brain function by influencing the activity of neurons. They are critical for 1) recycling neurotransmitters; 2) secreting neurotrophic factors (e.g., neural growth factor) that stimulate the growth and mainte- nance of neurons; 3) dictating the number of synapses formed on neuronal surfaces and modulating synapses in adult brain; and 4) maintaining the appropriate ionic composition of extracellular fluid surrounding neurons, by absorbing excess potassium and other larger molecules.
Oligodendrocytes
The oligodendrocyte is the analog of the Schwann cell in the central nervous system and is responsible for forming myelin sheaths around brain and spinal cord axons. Myelin is an electrical insulator.
Microglia
are the smallest of glial cells. They represent the intrinsic immune effector cells of the CNS and underlie the inflammation response that occurs following damage to the central nervous system and the invasion of microorganisms.
Lemmocytes
(Schwann Cells)
Schwann cells are glia cells of the PNS. They wrap individually around the shaft of peripheral axons, forming a layer or myelin sheath along segments of the axon. The Schwann cell membrane, which forms the myelin sheath, is composed primarily of lipids; the lipid serves as an insulator thereby speeding the trans- mission rate of action potentials along the axon.
Identify each structure:
Correct Identification:
Identify each structure:
Correct Identification:
Identify the Structures:
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