Embryology & Early Development
Posterior neuropore
The posterior neuropore is the rear opening of the neural tube that normally closes after the anterior end.
In short: Posterior neuropore
- Failure of its closure relates to spinal neural tube defects.
- It is the tail-end opening of the neural tube.
- It closes after the anterior neuropore.
- It contrasts with the head-end neuropore.
What it is
It is the rear (tail-end) opening of the neural tube, which normally closes after the anterior neuropore. Its closure completes the lower part of the neural tube.
Understanding Posterior neuropore
Problems with closure at this end relate to spinal neural tube defects like spina bifida, in contrast to the head-end (anterior) closure linked to encephalocele. Understanding both neuropores helps explain why neural tube defects occur in different locations — cranial versus spinal — depending on where closure fails.
Why it matters
Understanding the posterior neuropore helps families see the contrast between cranial defects like encephalocele and spinal defects like spina bifida, and how both fit into the same developmental framework.
Common questions
Where is the posterior neuropore?
At the tail end of the neural tube.
Does it close before or after the anterior?
After.
What does its failure relate to?
Spinal neural tube defects.
Bottom line
The posterior neuropore is the rear neural tube opening, related to spinal defects like spina bifida.
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