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31 Cards in this Set
- Front
- Back
output of a neuron |
single axon |
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input of a neuron |
dendrites |
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primary function of the the CNS? |
processing information |
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Are there nerves in the CNS? |
no nerves just axons |
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2 major types of cells in the nervous system |
1. neurons 2. glia cells |
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Name 3 types of glia cells |
astrocytes oligodendrocytes microglia |
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The CNS is made up of... |
brain spinal cord |
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The PNS is made up of .... |
31 paired spinal nerves 12 cranial nerves ganglia |
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What is ganglia or ganglion? |
collections of neuron cell bodies in the PNS |
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2 major functions of the nervous system |
somatic autonomic |
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Innervates voluntarily-controlled muscles |
somatic |
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innervates involuntarily-controlled smooth muscle, cardiac muscle, glands |
autonomic |
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The autonomic nervous system is divided into 2 divisions |
1. sympathetic 2. parasympathetic |
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Name 6 divisions of the CNS |
1. telencephalon 2. diencephalon 3. mesencephalon 4. metencephalon 5. myelencephalon 6. spinal cord |
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Name the division this item belongs in
Cerebral Cortex |
Telencephalon |
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Name the division this item belongs in
Thalmus and Hypothalmus |
Diencephalon |
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Name the division this item belongs in
Midbrain |
Mesencephalon |
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Name the division this item belongs in
Pons and Cerebellum |
Metencephalon |
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Name the division this item belongs in
Medulla |
Myelencephalon |
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What makes up the brainstem? |
medulla, pons and midbrain |
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What is filled with CSF and houses many blood vessels? |
subarachnoid space |
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Name 3 meninges |
dura mater arachnoid mater pia mater |
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Define Nucleus |
collection of neuron cell bodies in the CNS; nuclei is plural for nucleus |
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Define Cortex |
"bark" of cerebrum an cerebellum = equivalent of a nucleus |
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What does gray matter consist of? |
nuclei and cerebral cortex |
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What does white matter consist of? |
white matter is a collection of myelinated axons |
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Define Tracts |
a collection of axons with same origin, termination, and function |
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Commissure |
a tract that crosses the midline from one area of CNS to the equivalent (paired) area on the opposite side |
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Decussation |
a tract that crosses the midline from one area of the CNS to a different area on the opposite side |
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Afferent |
fiber bundle input to a nucleus or cortical area |
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Efferent |
fiber bundle output of a nucleus or cortical area |