neural placode
Pronunciation: NYUR-al PLAK-ode
Exposed neural tissue in spina bifida cases that requires surgical protection during fetal repair.
Full Definition
The neural placode is the exposed, undeveloped neural tissue visible in cases of open spina bifida (myelomeningocele). This tissue represents the open neural tube that failed to close during embryonic development and remains exposed to the amniotic environment. During fetal surgery, careful handling and protection of the neural placode is crucial as this tissue will develop into functional spinal cord. The surgical technique involves releasing the placode from surrounding tissues and creating a watertight closure to prevent further damage from amniotic fluid exposure.
Usage
Usage note: Distinguish from other neural developmental structures when describing fetal neural tube defects.
In Context
- "The neural placode was carefully dissected free from the surrounding skin edges during the fetal repair." — Operative report
- "Protective coverage of the neural placode is essential to prevent ongoing neurological deterioration." — Surgical technique description