Behavioral Neuroscience, Lecture on September 10th
Presynaptic cells - before synapse begins.
Postsynaptic cells - after synapse is completed.
*The gap between the terminal button and the receiving membrane is know as
the synaptic cleft.
Glia, the support cells of the nervous systems.
can send signals amongst themselves.
Microglia, small glia cells.
critical in immune response in the nervous system.
serve as microphages - eat and destroy other cells (foreign substances,
Astrocytes, star cells.
located specifically in the central nervous system (also the most
provide physical support for neurons as they create a matrix that holds
neurons in place.
connect to blood vessels in the brain, acquire glucose, either store the
glucose or turn it to lactate, ultimately providing nourishment to
control chemical composition of fluid surrounding neurons.
help to form synapses between neurons.
selectively permeable. (blood-brain barrier)
capillaries have no gaps, tight junctions.
astrocytes keep viruses and drugs and toxins out of the brain but allow
nourishing elements in.
Myelinating glia, produces myelin.
Schwann cell - myelinating glia located in the peripheral nervous system.
wraps itself around axon. Oligodendrocytes - myelinating glia in the central nervous system.
Can myelinate different axons of different neurons.
Myelinates multiple axons at once.
Problems with myelin may lead,
Multiple Sclerosis, an autoimmune disorder.
attacks myelin causing scarring.
symptoms depend on locations of l