Spinal cord
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| The spinal cord ends at this level (in adults) | L1/L2 IV disc
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| This extends from C5 to T1 and gives rise to the brachial plexus | cervical enlargement
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| This extends from L1 to S3 and gives rise to the lumbar and sacral plexuses | lumbosacral enlargement
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| The tapered inferior end of the spinal cord is known as | conus medullaris
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| This connective tissue filament is derived from pia mater and extends from the conus medullaris to the level of S2 | filum terminale internus
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| This connective tissue structure is derived from pia mater and is also surrounded by dura mater and attaches to the coccyx | filum terminale externus (coccygeal ligament)
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| After the termination of the spinal cord the nerve roots hang down to form this | cauda equina
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| In a newborn the spinal cord ends at this vertebral level | L3
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| Inferiorly the dural sac terminates blindly at this vertebral level | S2
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| The dura mater is separated from the vertebral column by this space, and it contains fat, connective tissue and the ___________ venous plexus | epidural, internal
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| The dura mater forms a ___________ around roots of spinal nerves and at the IV foramen becomes continuous with this. | sleeve, epineurium of spinal nerves
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| This is the space between the dura mater and the arachnoid | subdural space
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| Is the subdural space a real or potential space | potential
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| This is a wide real space, between the arachnoid and pia mater that contains CSF | subarachnoid space
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| This is the lower part of the subarachnoid space inferior to theh conus medullaris and contains the cauda equina, CSF, and filum terminale | lumbar cistern
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| In a lumbar puncture a needle is inserted into this space at this level to collect CSF | subarachnoid space, between the laminae of L3/L4 or L4/L5
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| This is a vascular membrane that adheres intimately to the surface of the spinal cord and roots of spinal nerves | pia mater
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| Extension of the pia mater in the coronal plane that helps to stabilize the spinal cord within the dural sac | denticulate ligament
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| The denticulate ligament attaches medially to spinal cord between what two structures | ventral and dorsal roots
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| This is a deep groove along anterior midline of spinal cord that is occupied by the anterior spinal vessels | anterior median fissure
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| This is a shallow groove along posterior midline of spinal cord | posterior median sulcus
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| These structures of the spinal cord correspond to the attachments of the dorsal and ventral rootlets of spinal nerves | anterolateral and posterolateral sulci
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| This spinal cord feature is found in the cervical and upper thoracic regions and is located between posterior median sulcus and antero- and postero- lateral sulci | posterior intermediate sulcus
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| The cell bodies of sensory neurons are found here | dorsal root ganglion
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| Spinal nerves are this type of nerve | mixed
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| The dorsal ramus supplies what | deep muscles of the back and skin of back
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| The ventral ramus supplies | skin and muscles of anterolateral trunk, limbs, and the superficial muscles of the back
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| The lateral horn of the grey matter of the spinal cord is found in these regions | thoracic and upper lumbar
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| The gray matter can be divided into layers based upon cytoarchitecture known as | Rexed's laminae
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| The doral horn contains these lamina(e) | I-VI
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| The intermediate zone contains which lamina(e) | VII
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| The ventral horn consits of this(these) lamina(e) | part of VII, VIII, IX
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| The area around the central canal is designated as this lamina | X
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| The dorsal horn contains groups of neurons that are influenced primarily by impulses entering via the ________________ and have ____________ function | doral root and sensory function
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| This nucleus is found at the apex of the dorsal horn and corresponds to lamina I | marginal (posteromarginal) nucleus
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| This nucleus is found in the doral horn and corresponds to lamina II | substantia gelatinosa
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| This nucleus in the dorsal horn corresponds to laminae III and IV and is the principle sensory nucleus | nucleus proprius
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| The marginal, substantia gelatinose, and nucleus proprius are found at what spinal cord levels? | along the entire length of the spinal cord
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| The ventral horn gives rise to axons that leave the spinal cord via the ____________________ and supply _________________. | ventral root, skeletal muscles
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| This type of nerve axon originates in the ventral horn and supplies extrafusal muscle fibers | alpha motor neurons
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| This type of neurons axons leave the spincal cord via the ventral root and supply intrafusal muscle fibers | gamma motor neurons
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| The ventral horn is well developed in what areas and why | the cervical and lumbosacral, motor innervation of upper and lower limbs
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| Found medially in the ventral horn, involved in what | medially motor column, innervation of muscles of axial skeleton
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| At what spinal cord levels is the medial motor column present? | all levels
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| This is found laterally in the ventral horn in the cervical and lumbosacral regions, and is involved in what? | lateral motor column, innervation of upper and lower limbs
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| The phrenic nucleus is found in ___________ horn, present in ________ segment(s) and has what function? | ventral horn, C3-C5, motor fibers to diaphragm via phrenic nerve
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| The accessory nucleus is found in ___________ horn, present in ________ segment(s) and has what function? | ventral horn, C1-C5, spinal root of accessory nerve
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| This section of grey matter consists primarily of interneurons for segmental and intersegmental integration of spinal cord functions. | intermediate zone
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| This nucleus is found in the medial part of intermediate zone of spinal cord | nucleus dorsalis
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| The nucleus dorsalis is located in what spinal cord segments | C8-L3
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| This nucleus gives rise to fibers that ascend to cerebellum in posterior spinocerebellar tract | nucleus dorsalis
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| The lateral horn is formed by this nucleus and is present at what spinal cord segments? | intermediolateral nucleus, T1-L2
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| This nucleus gives rise to all preganglionic sympathetic fibers for the body. | intermediolateral nucleus
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| This nucleus is located laterally in the intermediate zone of segments S2-S4 and gives rise to what type of fibers? | sacral parasympathetic nucleus, preganglion parasympathetic fibers
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Created by:
justice2