Incomplete closure of ectodermal cleft is know to cause
**Core Concept**
Incomplete closure of the ectodermal cleft during embryological development leads to the formation of a congenital anomaly. This process is crucial for the formation of the neural tube, which eventually gives rise to the central nervous system. Abnormalities in this process can result in various neurological conditions.
**Why the Correct Answer is Right**
Incomplete closure of the ectodermal cleft is associated with neural tube defects (NTDs), which are congenital anomalies that occur due to the incomplete closure of the neural tube during embryogenesis. This can lead to conditions such as spina bifida and anencephaly. The ectodermal cleft is a critical region where the neural plate folds inwards to form the neural tube. Abnormalities in this process can result in the failure of the neural tube to close properly, leading to NTDs.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not relevant to the incomplete closure of the ectodermal cleft.
* **Option B:** This option is not directly related to the ectodermal cleft or neural tube development.
* **Option D:** This option is not a known consequence of incomplete closure of the ectodermal cleft.
**Clinical Pearl / High-Yield Fact**
Neural tube defects can be prevented with the use of folic acid supplements during pregnancy, particularly in the first trimester. This is a critical aspect of prenatal care and is often emphasized in guidelines for pregnant women.
**Correct Answer: C. Neural tube defects.**