Fetal gut rotation - 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 02-24-2011
USMLE Forums Guru
 
Steps History: Step 1 Only
Posts: 487
Threads: 95
Thanked 1,494 Times in 359 Posts
Reputation: 1504
Arrow Fetal gut rotation

The net gut rotation (from the perspective of looking at the ventral aspect of the embryo) that results in the duodenum being anterior to the transverse colon is:

A. 90 degrees counterclockwise (CCW)
B. 90 degrees clockwise (CW)
C. 0 degrees
D. 270 degrees counterclockwise
E. 270 degrees clockwise

This looks very simple, but may confuse on the exam.
Reply With Quote Quick reply to this message
The above post was thanked by:
drahmednawaz (02-24-2011), drortho (11-28-2011), Mondoshawan (02-24-2011)



  #2  
Old 02-24-2011
USMLE Forums Addict
 
Steps History: 1 + CK
Posts: 116
Threads: 7
Thanked 348 Times in 94 Posts
Reputation: 358
Default

I hate anatomy!!! don't even bother to see Qs.
Reply With Quote Quick reply to this message
The above post was thanked by:
aktorque (02-24-2011)
  #3  
Old 02-24-2011
USMLE Forums Veteran
 
Steps History: Not yet
Posts: 298
Threads: 45
Thanked 746 Times in 217 Posts
Reputation: 756
Default B?

Oh boy, embryo is easily my worst subject. I would guess E. I vaguely remember a Clockwise rotation of the gut and 270 sounds like a good number (90 seems to small). But then again, I really have no good reasoning
Reply With Quote Quick reply to this message
The above post was thanked by:
aktorque (02-24-2011)
 
  #4  
Old 02-24-2011
USMLE Forums Veteran
 
Steps History: Not yet
Posts: 298
Threads: 45
Thanked 746 Times in 217 Posts
Reputation: 756
Default Correction: E

Meant to put E as my title
Reply With Quote Quick reply to this message
The above post was thanked by:
aktorque (02-24-2011)
  #5  
Old 02-24-2011
USMLE Forums Scout
 
Steps History: Not yet
Posts: 71
Threads: 12
Thanked 62 Times in 25 Posts
Reputation: 72
Default

I'm guessing D, it jumped out at me lol.

(btw, i hate embryo)
Reply With Quote Quick reply to this message
The above post was thanked by:
aktorque (02-24-2011)
  #6  
Old 02-24-2011
USMLE Forums Guru
 
Steps History: Step 1 Only
Posts: 487
Threads: 95
Thanked 1,494 Times in 359 Posts
Reputation: 1504
Arrow

Quote:
Originally Posted by apx85 View Post
Meant to put E as my title
@apx85 - always first choice would be 70% correct, Second choice 96% wrong, according to new UK students exam strategy and statistics.
Reply With Quote Quick reply to this message
The above post was thanked by:
Mondoshawan (02-24-2011)
  #7  
Old 02-24-2011
USMLE Forums Veteran
 
Steps History: Not yet
Posts: 298
Threads: 45
Thanked 746 Times in 217 Posts
Reputation: 756
Default

Quote:
Originally Posted by aktorque View Post
@apx85 - always first choice would be 70% correct, Second choice 96% wrong, according to new UK students exam strategy and statistics.
With embryology, I'm 96% wrong anyway haha. Hopefully for this question I'm part of that 4%
Reply With Quote Quick reply to this message
The above post was thanked by:
aktorque (02-24-2011)
  #8  
Old 02-24-2011
USMLE Forums Master
 
Steps History: 1+CK+CS
Posts: 590
Threads: 31
Thanked 1,255 Times in 414 Posts
Reputation: 1279
Default 270 counterclockwise

It's 270 counterclockwise - it's weird until you think about it as the loop of midgut coming out of the bellybutton, rotating, then going back in. Who came up with this crazy blueprint?
Reply With Quote Quick reply to this message
The above post was thanked by:
aktorque (02-24-2011)
  #9  
Old 02-24-2011
USMLE Forums Guru
 
Steps History: 1+CK+CS+3
Posts: 335
Threads: 24
Thanked 300 Times in 156 Posts
Reputation: 310
Default

I would go with D, I hate embryo and neuro!
Reply With Quote Quick reply to this message
The above post was thanked by:
aktorque (02-24-2011)
  #10  
Old 02-24-2011
USMLE Forums Guru
 
Steps History: Step 1 Only
Posts: 487
Threads: 95
Thanked 1,494 Times in 359 Posts
Reputation: 1504
Arrow B) 90 degrees clockwise (CW)

Quote:
Originally Posted by apx85 View Post
Oh boy, embryo is easily my worst subject. I would guess E. I vaguely remember a Clockwise rotation of the gut and 270 sounds like a good number (90 seems to small). But then again, I really have no good reasoning
apx85 was close enough to predict the correct answer but as usual all of us have that intention to change the answer and choose the wrong one... lol

I brought up this qn here on board b/c I wanted to let you guys be aware of this kind of qn may appear on the exam and do not panic. Only thing you need to know the nornal rotation of the fetal gut and USMLE want you to know that. I heard from many people, they said that on the exam they test the normal activity of the body (ie embryo and physio)

Correct ans is B) 90 degrees clockwise (CW)

This is reverse rotation, and results from 90 degrees CW rotation followed by 180 degrees CCW rotation. Normally, there is a net 270 degrees of CCW rotation (Mondoshawan mentioned above). If there is only 90 degrees CCW rotation, then it is a left sided colon, or non-rotation.
Reply With Quote Quick reply to this message
The above post was thanked by:
1TA2B (02-25-2011), apx85 (02-24-2011), doc_study (04-05-2011), mle2resident (02-24-2011), Mondoshawan (02-24-2011), wimzie (04-07-2011)
  #11  
Old 02-24-2011
USMLE Forums Master
 
Steps History: 1+CK+CS
Posts: 590
Threads: 31
Thanked 1,255 Times in 414 Posts
Reputation: 1279
Default

An excellent reminder to be more careful when I'm reading a question!
Reply With Quote Quick reply to this message
The above post was thanked by:
aktorque (02-24-2011), doc_study (04-05-2011)
  #12  
Old 02-25-2011
USMLE Forums Guru
 
Steps History: 1+CK+CS+3
Posts: 335
Threads: 24
Thanked 300 Times in 156 Posts
Reputation: 310
Default

Quote:
Originally Posted by Mondoshawan View Post
An excellent reminder to be more careful when I'm reading a question!
Something I have realized is as important as knowing the facts, and some I REALLY need to work on.
Reply With Quote Quick reply to this message
  #13  
Old 02-25-2011
1TA2B's Avatar
USMLE Forums Guru
 
Steps History: CK Only
Posts: 475
Threads: 39
Thanked 370 Times in 178 Posts
Reputation: 393
Default

I'm afraid I hate embryology very much too!

Thanks Guys
Reply With Quote Quick reply to this message
  #14  
Old 04-05-2011
kundra's Avatar
USMLE Forums Scout
 
Steps History: 1+CK+CS
Posts: 99
Threads: 12
Thanked 63 Times in 27 Posts
Reputation: 73
Help

Quote:
Originally Posted by aktorque View Post
apx85 was close enough to predict the correct answer but as usual all of us have that intention to change the answer and choose the wrong one... lol

I brought up this qn here on board b/c I wanted to let you guys be aware of this kind of qn may appear on the exam and do not panic. Only thing you need to know the nornal rotation of the fetal gut and USMLE want you to know that. I heard from many people, they said that on the exam they test the normal activity of the body (ie embryo and physio)

Correct ans is B) 90 degrees clockwise (CW)

This is reverse rotation, and results from 90 degrees CW rotation followed by 180 degrees CCW rotation. Normally, there is a net 270 degrees of CCW rotation (Mondoshawan mentioned above). If there is only 90 degrees CCW rotation, then it is a left sided colon, or non-rotation.
i haven't understood this concept of reverse rotation,i know the normal 270 degree ccw rotation but seems like my mind is blocked with this twist and turns.. can any1 please explain it?
Reply With Quote Quick reply to this message



Reply

Tags
Embryology-, Step-1-Questions

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


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Amniotomy + Bleeding + Fetal bradycardia Sabio USMLE Step 2 CK Classic Clues 6 05-05-2016 09:12 AM
Effects of 5 Alpha Reductase on Fetal Genital Development kemoo USMLE Step 1 Forum 4 01-27-2011 05:16 PM
Earliest Detection of Fetal Heartbeats khushboo USMLE Step 1 Forum 6 05-29-2010 10:04 PM

Find Us on Facebook
Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

USMLE® & other trade marks belong to their respective owners, read full disclaimer
USMLE Forums created under Creative Commons 3.0 License. (2009-2019)