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50 Cards in this Set
- Front
- Back
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Sacral Plexus
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contains the ventral rami from spinal nerves L4-S3
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Superior gluteal nerve
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Plexus: sacral
Nerves: L4-S1 Innervates: |
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Inferior gluteal nerve
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Plexus: sacral
Nerves: L5-S2 Innervates: Maximus gluteus |
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Tibial nerve
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Plexus: Sacral, from sciatic nerve
Spinal nerves; L4-S3 Innervates: |
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Sacral Plexus nerves
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Superior/Inferior gluteal, Sciatic, Common Peroneal, Tibial, Superficial/deep peroneal nerve
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Femoral Nerve
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Plexus: Lumbar
Spinal nerves: L2-L4 Innervates: Flexors of the hip (Iliapsoas) and anterior thigh |
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Obturator Nerve
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Plexus: Lumbar
Spinal nerves: L2-L4 Innervates: Medial thigh (passes through obturator foramen) |
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Sciatic nerve
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Plexus: sacral
Nerves: L4-S3 Innervates: the whole lower extremity! Splits into Tibial, Common Peroneal |
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Common Peroneal Nerve
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Plexus: Saccral, from Sciatic nerve
Nerves: L4-S2 Innervates Hamstringsshort head of biceps femoris |
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Number of spinal nerve pairs
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31
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Cervical nerves
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8
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Thoracic nerves
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12
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lumbar nerves
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5
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saccral nerves
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5
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coxxygeal nerves
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1
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Lumbar plexus
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Spinal nerves: T12, L1-L4
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Nerve plexus
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a complex interwoven network of converged adjacent spinal nerves that blend to produce compound nerve trunks.
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lumbosacral plexus
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The plexuses originating from the ventral ramii of the lumbar and saccral regions of the spine.
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lumbar plexus
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T12-L4; Nerves from here: femoral, obturator, both from L2-L4
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3 types of nerves based on number of axons and dendrites
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Multipolar, Bipolar, Unipolar
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One axon, multiple dendrites (seen on motor cells, many interneurons
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multipolar
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one axon, one dendrite (special sensory cells)
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bipolar
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one process acts both as a dendrite and axon (sensory cells)
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unipolar
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Supportive cells of the nervous system
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Glial cells
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Astrocytes, oligodendrocytes, microglia, ependymal cells
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Glial cells of the CNS
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Schwann Cells, satellite cells
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Glial cells of the PNS
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repair brain or nerve system
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Astrocytes
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Produce myelin for the CNS
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oligodendrocytes
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The garbage men of the CNS; they phagocytize debris within it
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Microglia
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These line the inner CNS cavities
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ependymal cells
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produce myelin in the PNS
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Schwann cells
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A collection of neuronal cell bodies within the CNS
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Nucleus
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A collection of neuronal cell bodies within the PNS
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Ganglion
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A bundle of axons within the CNS
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Nerve Tract
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A bundle of axons in the PNS
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Nerve
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Conveys nerve impulses toward the brain
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Afferent
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Conveys nerve impulses away from the brain
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Efferent
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White matter, gray matter, dorsal root, dorsal root ganglion, ventral root, spinal nerve, dorsal ramus, ventral ramus
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8 key components in a spinal cord segment
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composed of nerve cell processes; has an insulating coat of a fatty substance called myelin
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white matter
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composed of nerve cell bodies; does not have myelin coating
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gray matter
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sensory nerve processes bringing information into the spinal cord
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dorsal root
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CNS
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Brain and Spinal Cord
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PNS
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Cranial and Peripheral nerves
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Neuron components (6)
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Cell body, axon, dendrite, synapse, myelin, nodes of ranvier
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conveys stimulus away from the cell body
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axon
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conveys stimulus toward the cell body
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dendrite
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junction between axon and dendrite or cell body
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synapse
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insulating fat, speeds velocity of conduction on nerves
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myelin
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space between myelin sheaths on a nerve
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nodes of ranvier
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Spinal Nerves: how many, what kinds
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31 total pairs
8 cervical 12 thoracic 5 lumbar 5 saccral 1 coxxygeal |
