Stroke localization by visual field exam? - USMLE Forums
USMLE Forums Logo
USMLE Forums         Your Reliable USMLE Online Community     Members     Posts
Home
USMLE Articles
USMLE News
USMLE Polls
USMLE Books
USMLE Apps
Go Back   USMLE Forums > USMLE Step 1 Forum

USMLE Step 1 Forum USMLE Step 1 Discussion Forum: Let's talk about anything related to USMLE Step 1 exam


Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 04-20-2012
tyagee's Avatar
USMLE Forums Master
 
Steps History: ---
Posts: 1,365
Threads: 648
Thanked 584 Times in 354 Posts
Reputation: 594
Neuro Stroke localization by visual field exam?

PCA vs MCA stroke ? how can i differentiate based on visual feild examination . please help.
Reply With Quote Quick reply to this message



  #2  
Old 04-20-2012
USMLE Forums Addict
 
Steps History: Not yet
Posts: 166
Threads: 55
Thanked 32 Times in 25 Posts
Reputation: 42
Default

I think that PCA lesion will result classically in a contralateral homonomous hemianopia with macular sparing..

MCA .. causes hemianopia without sparing..
however, MCA lesion is wide and it has many other manifestations as hemiplegia and wernicke's and other manifestations.. so the history alone is sufficient to differentiate between them..
Reply With Quote Quick reply to this message
  #3  
Old 04-20-2012
USMLE Forums Addict
 
Steps History: Step 1 Only
Posts: 127
Threads: 3
Thanked 112 Times in 62 Posts
Reputation: 122
Default

Macular sparing only happens with occipital lesions. If you have macular sparing, it's a PCA stroke. If you don't have macular sparing, the lesion is somewhere else.
Reply With Quote Quick reply to this message
The above post was thanked by:
Valkoff (04-20-2012)
  #4  
Old 04-20-2012
USMLE Forums Master
 
Steps History: 1+CK+CS
Posts: 1,406
Threads: 118
Thanked 642 Times in 407 Posts
Reputation: 652
Default

Quote:
Originally Posted by shan564 View Post
Macular sparing only happens with occipital lesions. If you have macular sparing, it's a PCA stroke. If you don't have macular sparing, the lesion is somewhere else.
yep, thats right
__________________
"inflammable means flammable!? What a country."
Reply With Quote Quick reply to this message
  #5  
Old 04-20-2012
tyagee's Avatar
USMLE Forums Master
 
Steps History: ---
Posts: 1,365
Threads: 648
Thanked 584 Times in 354 Posts
Reputation: 594
Default

is there anything called quantranopsia in MCA\PCA infarct?
Reply With Quote Quick reply to this message
  #6  
Old 04-20-2012
USMLE Forums Master
 
Steps History: ---
Posts: 530
Threads: 35
Thanked 291 Times in 207 Posts
Reputation: 301
Default

u can have bitemporal inferior quandrantanopia w Anterior communicating artery aneurysm pressing on superior portion of optic chiasm.
Reply With Quote Quick reply to this message



Reply

Tags
Nervous-System-, Neuroanatomy-, Pathology-

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the USMLE Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Medical School
Choose "---" if you don't want to tell. AMG for US & Canadian medical schools. IMG for all other medical schools.
USMLE Steps History
What steps finished! Example: 1+CK+CS+3 = Passed Step 1, Step 2 CK, Step 2 CS, and Step 3.

Choose "---" if you don't want to tell.

Favorite USMLE Books
What USMLE books you really think are useful. Leave blank if you don't want to tell.
Location
Where you live. Leave blank if you don't want to tell.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
University vs field of choice amberafzal USCE & Clinical Rotations 2 04-14-2012 01:39 AM
Visual acuity exam in the CS encounter witecloud USMLE Step 2 CS Forum 1 03-26-2012 04:10 PM
Which arterial occlusion led to this visual field defect? sfsheran USMLE Step 1 Forum 3 03-03-2012 02:20 PM
which visual field defect is this? struggle USMLE Step 1 Forum 10 11-27-2011 05:12 PM
15 yrs away from Medical Field DariAwar General Topics Forum 3 05-12-2011 03:12 AM

RSS Feed
Find Us on Facebook
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

USMLE® & other trade marks belong to their respective owners, read full disclaimer
USMLE Forums created under Creative Commons 3.0 License. (2009-2014)