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  1. #1
    pharmguy is offline Newbie 510 points
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    Ventricular Enlargement

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    I'm doing some "critical thinking" questions, and I have one that's confusing me.

    "A patient exhibits enlargement of the lateral and third ventricles, but no enlargement of the fourth ventricle. What would you conclude?"

    Any help would be greatly appreciated!

  2. #2
    pharmguy is offline Newbie 510 points
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    Patient is simply suffering from hydrocephalus, and put in a shunt to allow the CSF to drain adequately?

  3. #3
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    anhquoc4m is offline Member 511 points
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    Hydrocephalus (No doubt)

    Hello,
    This is a great question and thank you to all my professors especially my undergraduate professor for human physiology because she taught diagnostic physiology, not based on memorization.

    To answer your question:Once it is collected in the choroid plexus of the lateral ventricles, it goes down into the third ventricle via the cerebral aqueduct (THIS IS YOUR ANSWER RIGHT HERE, an obstruction would lead to an enlargement of lateral and 3rd ventricle due to the built up of CSF and this may even cause a midline shift due to the pressure) and into the fourth ventricle. From the fourth ventricle it exits through either the lateral aperature or the median aperature located on the roof of the fourth ventricle. That exit leads to the subarachnoid space and it coats the CNS removing wastes, adding nutrients, and provididng buoyancy and stability for the brain. CSF enters the arachnoid villi and by force of pressure a on the CSF it is allowed to enter the dural venuouss sinuses without permitting any venuous blood to enter the subarachnoid space. The dirty plasma leaves and enters the blood stream to be filtered by the kidneys and secreted in urine.

  4. #4
    DEQNY85's Avatar
    DEQNY85 is offline Elite Member
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    aqueduct of sylvius blockage....this is a kaplan question
    Ross Graduate- 2012
    PGY1- Surgery Prelim

  5. #5
    cooolguy is offline Member 49 points
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    sorry man this is a no brainer

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