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CHAPTER 4: Development of the Central Nervous System

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Which embryonic layer develops into the nervous system?

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A. Endoderm

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B. Ectoderm

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C. Mesoderm

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D. Induction

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B. Ectoderm

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What are the functional consequences of gyrification?

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A. It allows normal brain growth in limited space during early fetal period.

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B. Inadequate gyrification may cause CNS dysfunction after birth such as schizophrenia.

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C. Excess gyrification may lead to undersized gyri and postnatal complications.

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D. All of the above

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D. All of the above

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What do the vesicles develop into later?

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A. Forebrain, midbrain, spinal cord

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B. Forebrain, midbrain, cranium

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C. Spinal cord, midbrain, progenitor of hindbrain

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D. Forebrain, midbrain, progenitor of hindbrain

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D. Forebrain, midbrain, progenitor of hindbrain

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Consequences of improper neuropore closure include all of the following except:

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A. anencephaly.

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B. spina bifida.

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C. polymicrogyria.

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D. microencephaly.

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C. polymicrogyria.

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What process creates the cauda equina?

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A. Growth of somites delays spinal cord development.

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B. Growth of the vertebral column occurs more quickly than the spinal cord.

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C. Growth of the spinal nerves is delayed due to neurulation.

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D. Growth of the medulla oblongata delays spinal cord development.

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B. Growth of the vertebral column occurs more quickly than the spinal cord.

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In the brainstem, the sulcus limitans separates motor nuclei, located________, from sensory nuclei, which are located_____.

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A. medially, dorsally

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B. ventromedially, dorsolaterally

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C. dorsally, medially

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D. dorsolaterally, ventromedially

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B. ventromedially, dorsolaterally

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Which statement regarding synaptogenesis and neural pruning is false?

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