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20 Cards in this Set
- Front
- Back
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Where does the spinal cord end in adults? infants?
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Adults - L1-L2
Infants - L3 |
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Describe the namiing of the spinal nerves?
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In the cervical region they are named by the inferior vertebra. At T1 they are all named by their superior vertebra.
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What is the conus meduallaris?
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It the narrowing of the spinal cord -- nerves still come off of the conus meduarlis
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Where does the cadua equina extend from? what is it made up of?
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Extends from the conus meduaris to the coccyx
Made up of T10 to Cox1 levels |
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What is the filum terminale made up of?
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the pia mater
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What is the gray matter made out of/
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gial cells and neuronal cells
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What does the fibers in the ventral root do?
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Sends out motor fibers that innervate the somatic muscles
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What does the dorsal root do?
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Receives sensory fibers from the PNS and brings it into the CNS
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How can the dorsal root ganglion have no synapses?
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Because the nerves in there are unipolar so they extend their -- synapses in the dorsal horn of the spinal cord
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Where does the dura mater extend to?
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S2
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What does the epidural space contain?
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internal plexus of veins that drain the spinal cord
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What contains the CSF? Where is it made?
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the subarchnoid space - made in the choroid plexus
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Dermatome-
C5 C6 T4 T10 L1 |
C5 --Clavical
C6 -- Thumb T4 - Nipples T10 - Belly Button L1 - Groin Region |
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What is the dermatome pattern for the upper limb?
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The lateral arm = C5
lateral foream and thenar =C6 medial fingers =C7 median hand and forearm = C8 medial upper limb = T1 |
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What is the dermatome pattern for the lower limb?
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L2 and L3- thigh
L4 - knee L5- lateral leg and foot dorsum |
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What are the sacral levels dermatome? and the coccygeal levels form around?
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medial level of the sacral level
S1, S2 - midline of the back of thigh, leg and lateral half plantar surface coccygeal - around the anus |
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How many anterior spinal arteries are there and how many posterior spinal arteries?
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Anterior -- 1
Posterior - 2 |
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What is the primary source of blood supply to the cadual part of the vertebral column?
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Because the 3 spinal arteries diminish as you go caudally you need segmental arteries to get lower
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What does the ANS innervate?
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cardiac muscle and smooth muscle
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Visceral afferents--
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sensory fibers associated with the ANS
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