We're unable to sign you in at this time. Please try again in a few minutes.
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
There may be a problem with your account. Please contact the AMA Service Center to resolve this issue.
Contact the AMA Service Center:
Telephone: 1 (800) 262-2350 or 1 (312) 670-7827  *   Email: subscriptions@jamanetwork.com
Error Message ......
Article |

Finding Neural Tube 'Zippers' May Let Geneticists Tailor Prevention of Defects

Paul Cotton
JAMA. 1993;270(14):1663-1664. doi:10.1001/jama.1993.03510140015004.
Text Size: A A A
Published online


THE MYSTERY of neural tube defects is unraveling at an increasingly rapid pace.

On the heels of the finding that folic acid supplements could prevent 60% to 72% of these common birth defects in North American and Northern European populations (JAMA. 1993;269:1257-1261) comes new evidence published this month that there is not one but five separate closures, or "zippers," involved in normal neural tube fusion (Am J Med Genet. 1993;47:5).

Until now, a specific cause could be identified in only 10% of cases, and the rest "were all just lumped together in a giant, unknown soup you couldn't do anything about because you didn't know" what environmental or genetic factors might be at fault, says Margot Van Allen, MD, clinical associate professor of medical genetics at the University of British Columbia Faculty of Medicine, Vancouver, and first author on the neural tube closure article.

Rigid scientific confirmation of Van Allen's


Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?




Also Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
Please click the checkbox indicating that you have read the full article in order to submit your answers.
Your answers have been saved for later.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.


Some tools below are only available to our subscribers or users with an online account.

0 Citations

Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

Related Content

Customize your page view by dragging & repositioning the boxes below.