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Cnim Sseps Questions And Answers With Verified Solutions Already Passed!!!
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Cnim Sseps Questions And Answers With Verified Solutions Already Passed!!!
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Cnim Sseps Questions And AnswersWith Verified Solutions Already
Passed!!!
When looking at the grid for sensorimotor mapping, which way are the waves
going to detect motor vs sensory? - ANSWER✔✔ Strip is on motor if all waves
start downward
strip is on sensory if all waves start up
What nerve should be stimulated with localization of sensorimotor cortex? -
ANSWER✔✔ Median nerve contralateral to the side being exposed
Where is the sensory strip located? - ANSWER✔✔ post central gyrus
What are 4 characteristics of epidural SSEP electrodes? - ANSWER✔✔ unaffected
by anesthesia, recorded at fast rates, placed by surgeon, all or nothing repsonse
What is neurotoxicity? and how is it prevented? - ANSWER✔✔ exposure to a toxic
chemical, you protect against by using platinum iridium electrodes, other types of
metal become toxic when they have current running through them
What are the 2 propogated potentials? And where do you see changes? -
ANSWER✔✔ Erbs and PF- changes in latency NOT in amplitude
What are the 2 stationary potentials? And where do you see changes? -
ANSWER✔✔ N13 and LP- changes in amplitude NOT latency
, What does supra maximal mean? - ANSWER✔✔ stim intensity; all the axons are
depolarized, the response isnt going to get any bigger
What can changes in SSEPs post incision be from? - ANSWER✔✔ light anesthesia
What does it mean if you see an increase in ALL absolute latencys (Erbs and PF
too) - ANSWER✔✔ not surgical error, its cold limb, decreased BP, ect
If there is a dorsal column lesion, how do the PF and Erbs respond? - ANSWER✔✔
They are normal
What is a motor threshold? - ANSWER✔✔ Minimum stimulus intensity that
results in a twitch in appropriate muscle group
Which columns are associated with SSEPs? - ANSWER✔✔ Dorsal columns- touch,
proppriception
What is the medulla oblongata also called? - ANSWER✔✔ The metencephalon
The anterior horn of the spinal cord is related to what type of neurons? -
ANSWER✔✔ Motor neurons
The posterior horn of the spinal cord is related to what type of neurons? -
ANSWER✔✔ Sensory neurons
Which artery supplies 2/3 of the spinal cord? - ANSWER✔✔ Anterior Spinal Artery
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