Introduction Flashcards
What makes up the CNS?
brain and spinal cord
What makes up the PNS?
cranial and visceral nerves and ganglia
What are the three glia cells?
oligodendrocytes, astrocytes, microglia
What do afferents do?
carry info to the CNS
What do efferents do?
carry info away from CNS
What is a collection of neural cell bodies in white matter?
nucleus
What do you call it when neuronal cell bodies are organized in layers?
lamina/cortex
What is an accumulation of neuronal cell bodies in the PNS?
ganglion
What do you call a collection of nerve fibers in the PNS?
nerves
What do you call a collection of nerve fibers in the CNS =tractus, fasciculus, funiculus, penduncle,lemniscus?
tracts
What do you call crossing over of nerve tracts from one side to the other?
commissure/decussation
What causes localization of symptoms or neurological defects?
commissure/decussation
What makes up a neuron?
soma, dendrites, axon, synapses
What is a neuropil?
tangle of dendrites, axons, glia
a dense network of interwoven nerve fibers and their branches and synapses, together with glial filaments.
What are the 2 types of ganglia?
Synaptic relay (sympathetic ganglia) No synaptic relay (dorsal root ganglia)
What is this:
a glial cell similar to an astrocyte but with fewer protuberances, concerned with the production of myelin in the central nervous system.
oligodendrocyte
What are these:
glial cells derived from mesoderm that function as macrophages (scavengers) in the central nervous system and form part of the reticuloendothelial system.
microglia cells
What does this:
They perform many functions, including biochemical support of endothelial cells that form the blood–brain barrier, provision of nutrients to the nervous tissue, maintenance of extracellular ion balance, and a role in the repair and scarring process of the brain and spinal cord following traumatic injuries.
astrocytes
