Prep4USMLE Forum » USMLE Step 1 Forum » Anatomy & Neuranatomy |   Posterior Cerebral artery

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KOBITA Forum Junior Topics: 14 Posts: 53	12/26/06 - 07:07 AM             #1 Can anyone please explain that how P C A damage causes Homonomous Hemianopsia with macular sparing? How does it spare the macula??
Ancylostoma Forum Guru Topics: 42 Posts: 642	12/26/06 - 11:39 AM             #2 the area of the visual cortex that provide for the sight of the macula has a dual blood supply, from MCA and PCA. Thats why occlusion of the PCA causes macular sparing, becuase the mca still provide blood to that part of the cortex. The rest of the visual cortex only gets blood via the PCA Edited by Ancylostoma on 12/26/06 - 11:59 AM
po Forum Elite Topics: 39 Posts: 356	12/28/06 - 03:15 PM             #3 yep,agree.
sataleees Forum Newbie Topics: 4 Posts: 32	01/02/07 - 04:05 AM             #4 exactly ___________________ keep going.. as the GOING gets TOUGH, the TOUGH gets GOING.. keep going..

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