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33 Cards in this Set
- Front
- Back
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The central nervous system is made of?
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cerebral hemispheres
diencephalon brain stem cerebellum spinal cord |
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What makes up the diencephelon?
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Thalamus, hypothalamus and epithalamus
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The brain stem includes what?
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The pons, medulla and midbrain
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cell bodies in the CNS are also called what?
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cytons
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nerve body collections that are gray are called what?
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gray matter
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gray matter collections in the nervous system are called what?
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nuclie, ganglia, cortex
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What are nuclie
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cell bodies in clusters
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What is the cortex
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gray matter on the outer part of the hemispheres
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Large areas of gray matter located in the white matter are called what?
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Ganglia or Basal ganglia
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White matter is made of what?
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fiber bundles called tracks
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What contains the nerve bodies?
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gray matter
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How are tracks named?
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by their origin and termination points
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What are other names tracks?
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fasciculus, lemniscus or peduncle
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What are the 3 processing pathways for sensory information?
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Reflex connection
Cerebellum - for muscle awareness Cerebral Cortex - for conscious awareness (molar pain) |
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Sensory pathways that lead to conscious awareness have how many neurons?
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3
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what are the 3 sensory neurons called?
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first, second and third order neurons
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in the sensory pathway that leads to awareness which neuron crosses the midline? What is the exception?
Where is it found? Where does it terminate? |
second order
exception is the olfactory nerves only in the CNS In the thalamus |
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first order neuron always start where?
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in the periphery
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Where do 3rd order neurons terminate?
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in the sensory strip (post central gyrus) in the cerebral cortex
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Motor pathway have how many neurons? What are they called?
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2
Upper and Lower neurons |
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Motor neurons leave through what?
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the internal capsule
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Where do motor neurons synapse?
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in the ventral part of the gray matter in the spinal cord
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Which motor neuron crosses the midline?
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the first motor neuron
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The first motor neuron originates where?
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in the cortex
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Where does the first motor neuron end?
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either in the ganglia in the brain stem(for cranial nerve motor fibers) or in the ventral gray matter in the spinal cord
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Describe the path of the lower motor neuron
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it leaves the motor nucleus running in the peripheral nerves and goes to the muscle it supplies
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True or False: The cerebral cortex and basal ganglia supply the same side of the body
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False
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True or False: The cerebellum supplies the same side of the body.
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True
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What are corticospinal tracks?
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descending motor tracks that go directly from cortex to spinal cord
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What are corticbulbar tracks?
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They descend to their termination without synapsing. They usually cross the midline
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Do motor neurons go through the thalamus?
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no
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In the spinal column where are sensory cells and connections found?
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in the dorsal gray columns
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In the spinal cord where are motor cells and connections found?
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in the ventral columns
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