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34 Cards in this Set
- Front
- Back
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Receiving end/receptor |
Dendrite |
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Soma |
Cell body |
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Nerve fiber, generates impulse, covered with myelin |
Axon |
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Enlarged cell body area (between cell body and axon) |
Axon Hillock |
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Covers axon (fatty tissue) |
Myelin sheath |
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Myelin sheath gap |
Node of Ranvier |
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Form synapses w/ neurons |
Axon terminal |
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Axon to dendrite |
Synapse |
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Myelination in the CNS |
Oligodendrocytes |
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Myelination in the PNS |
Schwann cell |
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Toward CNS |
Afferent |
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Away from CNS |
Efferent |
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Relay neuron (afferent -> inter -> efferent) |
Interneurons |
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Group of cell bodies in CNS (grey matter) |
Nuclei |
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Group of cell bodies in the PNS |
Ganglia |
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Group of axons in the CNS (white matter) |
Tract |
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Group of axons in PNS |
Nerve |
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5 steps |
Sensory Afferent Interneuron Efferent Effector |
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Distal end of spinal cord |
Conus medullaris |
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Anchors end of spinal cord to the coccyx |
Filum terminale |
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Web of nerves coming from conus medullaris |
Cauda equina |
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Thickest, toughest, double layered membrane. |
Dura mater |
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Middle, web-like, delicate |
Arachnoid mater |
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Deepest, non-permeable, on brain (inflammation of this layer is meningitis) |
Pia mater |
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Tracts, myelinated axons in CNS, superficial in spinal column, deep in brain |
White columns |
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Nuclei, nerve cell bodies in CNS, deep in spinal column, superficial in brain |
Gray commisure |
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Path of nerve impulse |
Dorsal root ganglion Dorsal root Dorsal horn Ventral horn Ventral root |
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Covering entire nerve |
Epineurium |
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Covering nerve fasicle |
Perineurium |
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Inner most nerve covering |
Endoneurium |
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Out of spinal cord from neck |
Cervical plexus |
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From upper middle back (shoulders) |
Brachial plexus |
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From low back |
Lumbar plexus |
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From pelvic region |
Sacral plexus |
