17 Questions
During neurulation, what is the first step in the formation of the nervous system?
Formation of neural plate and neural folds
Which structure originates from the neural crest during neurulation?
Neural tube
What is the term for the embryo during the period of organogenesis from the 3rd to 8th week of human development?
Neurula
Which defect may arise if there is a failure in the closure of neural folds during neurulation?
Neural tube defect
What is the function of the neural tube during development?
Protection for spinal cord and brain
Which step marks the initiation of neurulation during human development?
Formation of neural plate and neural folds
What is a common outcome if there is a defect in neural tube closure?
Neural tube defects
Which of the following is a possible differential diagnosis for a case with elevated maternal serum AFP during prenatal screening?
Spina bifida
In the process of neurulation, what occurs after the formation of neural plate and neural folds?
Closure of neural folds to form the neural tube
During neurulation, what may result from a defect in the closure of the neural tube?
Neural tube defects (NTDs)
What happens if there is a failure in the migration of neuroectodermal cells during neural tube formation?
Absence of peristalsis in the aganglionic segment
Which structure differentiates into the Peripheral Nervous System (PNS) and Autonomic Nervous System (ANS) during neurulation?
Cell masses formed by the neural crest
In the context of neural tube formation, what is the likely outcome if there is a defect in the formation of the neurulation structure?
Lack of differentiation into CNS (brain & spinal cord)
What specific condition can result from the failure of the cranial neuropore to close during development?
Anencephaly
If the caudal neuropore does not close properly during development, what condition is likely to occur?
Spina bifida
Which part of the neural tube will become the ependyma of the spinal cord?
Ependymal layer
In neurulation, what is the specific outcome if there is a defect in the closure of the neural folds?
Spina bifida
Learn about different types of cranial meningocele conditions like meningoencephalocele and meningohydroencephalocele. Understand what part of the brain herniates in each case.
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