Neurology Quiz #1: Neural Embryology

1. A 2-day-old newborn is brought to the pediatrician because of a noticeable sac protruding from the midline of his lower back. The sac is covered with skin and the child does not appear to be in any distress. Ultrasound of the sac reveals the presence of meninges, spinal cord tissue, and nerves. Which of the following embryological defects is most likely responsible for this condition? 

Question 1 of 5

2. A researcher is studying the development of the autonomic nervous system in chick embryos. She notes that the cells giving rise to the peripheral components of the sympathetic and parasympathetic nervous system originate from a specific population of cells that migrate from their original location. These cells are also responsible for the development of various other structures, including the adrenal medulla and facial cartilage. Which of the following cell populations is the researcher most likely observing? 

Question 2 of 5

3. A 3-week-old embryo is observed under a microscope. At this stage of development, the neural tube has just closed. Which of the following structures is directly formed by the neural tube? 

Question 3 of 5

4. During a prenatal visit, a pregnant woman undergoes an ultrasound that reveals an absence of the cranial vault with visible brain tissue in the fetus, a condition explained to her as anencephaly. This anomaly is most closely associated with a failure in which of the following embryological processes? 

Question 4 of 5

5. A medical student is reviewing the development of the peripheral nervous system and learns that Schwann cells, which are responsible for myelination of peripheral nerves, originate from a specific embryonic cell population. Which of the following cell populations gives rise to Schwann cells? 

Question 5 of 5


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