BRAIN
SPINAL CORD
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When does neurulation occur?
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Week 1-2
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Week 2-3
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Week 3-4
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Week 4-5
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Week 5-6
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Explanation:
Detailed explanation-1: -During the 4th week, the cranial end of the neural tube develops into forebrain (prosencephalon), midbrain (mesencephalon) and hindbrain (rhombencephalon). Then during the 5th week, the forebrain splits into telencephalon and diencephalon. The hindbrain differentiates into metencephalon and myelencephalon.
Detailed explanation-2: -The third week is concerned with establishing left and right handedness, the craniocaudal axis, as well as the conversion of the bilaminar disc into a trilaminar embryo. Additionally, there is further specialization of the extraembryonic structures that will continue to support the embryo during the intrauterine phase.
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