canstep1
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During a fight, a 32-year-old man is hit on the back of the neck with a chair. A CT scan reveals a bony fragment that penetrated the lateral portion of the dorsal columns. Which of the following functions would most likely be affected by this lesion?
(A) Fine motor control of the ipsilateral fingers
(B) Motor control of the contralateral foot
(C) Sweating of the ipsilateral face
(D) Proprioception from the ipsilateral leg
(E) Vibratory sense from the ipsilateral arm
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| rida
Forum Guru
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E) Fasciculus Cuneatus so arm must be affected.
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| mash
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E) I/L loss of vibration frm arm
lesion is below medulla so, I/L
lateral fibers (f cuneatus) carry touch/ vibration / position frm UL
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| rubensssss
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(E) fasciculus cuneatus upper boddy extremeties.
Fragment penetrating the lateral portion of the Colum.
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| shawn333
Forum Senior
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dorsal comoumn carry , PTV , position , touch and vibration ans E
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| canstep1
Forum Junior
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correct
answer is e)
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| WEB_MaStR
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I agree on answer e) :wink:
If the bony fragment had penetrated the posterior aspect of the dorsal columns, then both upper and lower extremities would have affected I/L.
BTW, answer e) will also have affected the proprioception sensitivity, because vibration is part of the proprioception sensitivity.
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