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