Anatomy-Spinal Cord
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| where does the spinal cord lie | vertebral canal
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| where does the spinal cord end | L1 and L2
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| spinal nerves that suppply the upper limb | cervical enlargement (C4-T1)
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| spinal nerves that supply the lower limbs | lumbar enlargement (T9-T12)
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| point where the cord narrows just before ending | conus medullaris
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| collection of rootlets that combine to make the lumbar and sacral nerves | cauda equina
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| filament composed of pia matter than anchor the cord to the coccyx | filum terminale
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| the outer layer of all CNS structures | dura mater
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| spider-web like fimanetous layer of the meninges | arachnoid mater
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| thin vascular layer of meninges that is adherent to contours of CNS | pia matter
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| connections (made of pia matter) between the spinal cord and dura mater that anchor the cord | denticulate ligament
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| three layers that make up the spinal meninges | pia mater, arachnoid and dura mater
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| these are formed from dorsal and ventral roots joining | spinal nerves
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| why are there 8 cervical spinal nerves when there are only 7 cervical vertebrae | C1 has a nerve above and below it
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| What do the spinal nerves pass through | intervertebral foramen
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| supply nerves fibers to the posterior body | dorsal ramus
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| supply nerve fibers to the limbs and anterior body | ventral ramus
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| which has myelin: gray matter or white matter | white matter
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| which has no myelin: gray matter or white matter | gray matter
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| the dorsal, lateral and anterior columns of white matter are filled with _____________ | tracts
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| the dorsal root of spinal nerves is all _______________ fibers | sensory
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| the ventral root of spinal nerves is all ______________ fibers | motor
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| What three things do the lateral/anterior columns of the spinal tracts trasmit | pain, pressure, general sensations
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| what two things do the posterior columns of the spinal tracts transmit | propriorecption, movement
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| what is proprioreception | body's awareness of self..where and what you are doing
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| what two connections make up the spinal nerve | posterior root and anterior root
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| the dorsal (posterior) root is made up of _______________ axons | sensory
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| the ventral (anterior) root is made up of ____________ axons | motor
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| __________________ are the only nerves that go directly to the bod structures they supply | thoracic nerves
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| all nerves except thoracic nerves (do or do not) go directly to body strutures they supply | do not
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| what vertebrae make up the cervical plexus | C1-C5
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| What plexus innervates the muscles and skin on the neck, head and upper shoulders | cervical plexus
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| what vertebra make up the brachial plexus | C4-T2
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| what plexus innervates the muscles and skin on the arms, forearm, hand, deltoid and pectoral regions | brachial plexus
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| What plexus includes: roots, trunks, division, cords and branches | brachial plexus
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| what vertebrae make up the lumbar plexus | L1-L4
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| What plexus innvervates the abdominal wall, pelvic area, muscles of the thigh | lumbar plexus
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| what vertebra make up the sacral and coccygeal plexuses | L4-L5 and S1-S4
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| What plexus innervates the buttocks, perineum and lower limbs | sacral and coccygeal plexuses
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| each spinal nerve contains sensory nerurons that serve a specific, predictable segment of the body | dermatomes
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