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36 Cards in this Set
- Front
- Back
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What is the Central Nervous System divided into? |
Central Nervous System & Peripheral Nervous System |
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What si the Central Nervous System composed of? |
Brain+ Spinal Cord |
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What is the peripheral nervous System (PNS) composed of? |
Everything else |
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What three parts is the brain stem composed of? |
Midbrain+pons+medulla |
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Where is cerebrospinal fluid created? |
In the choroid plexus |
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What are the three layers called that protect the central Nervous system (CNS)? |
Dura, Arachnoid, pia |
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What are the orientations? |
Anterior (rostral), superior (dorsal), posterior (caudal), inferior (ventral) |
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If below the midbrain, what are the orientations? |
Anterior (ventral), superior (rostral), posterior (dorsal), inferior (caudal) |
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What are the three planes of section? |
Horizontal plane, coronal plane, sagittal plane |
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What cell is the nervous System composed of? |
Nerve cells/ neurons |
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What are support cells? |
Glial cells |
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What does each neuron contain? |
Nucleus, dentrites, and axons |
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What kind of processes do axons and dentrites do |
Dentrites- short processes Axons- long processes |
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What regions does communication between neurons take place? |
Synapses |
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These are released during synapses and excite or hinder communication between neurons |
Chemical neurotransmitters |
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What happens when a neuron is excited? |
An action potential occurs |
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What do myelin sheaths do? |
Speed up action potential conduction |
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These are areas of the central Nervous system (CNS) made up of myelinated axons |
White matter |
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Areas made up of mainly cell bodies are called this |
Gray matter |
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Local synaptic communication occurs where? |
In the gray matter |
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Long distance communication occurs where? |
In the white matter |
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These are bundles of axons- in the PNS |
Nerves/ peripheral nerves |
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Clusters of cell bodies in the PNS |
Ganglia |
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These systems tend to be more ventral or anterior |
Motor systems |
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These systems tend to be more dorsal or posterior |
Sensory systems |
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Dorsal nerve roots convey what |
Sensory information |
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Ventral nerve roots convey what |
Motor information |
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The collection of nerve roots below the spinal canal are called what |
Cauda equina |
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This is a meshwork of nerves controlling the arms |
Brachial plexus |
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Meshwork of nerves controlling the legs |
Lumbosacral plexus |
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There is an increase of what in the cervical enlargment & lumbosacral enlargment? |
Gray matter |
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The PNS includes what nervous system? |
Autonomic nervous system |
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What does the autonomic nervous system in control of? |
Automatic functions like heart rate, sweating, breathing |
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What are the two divisions of the autonomic nervous system? |
The sympathetic division, the parasympathetic division |
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What does the sympathetic division control? |
"fight or flight" increased heart rate, blood pressure, pupil size |
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What is the parasympathetic division in control of? |
Increasing gastric secretion, slowing heart rate, decreasing pupil size |
