CHAPTER 4: Development of the Central Nervous System

CHAPTER 4: Development of the Central Nervous System

Which embryonic layer develops into the nervous system?

A. Endoderm

B. Ectoderm

C. Mesoderm

D. Induction

B. Ectoderm

What are the functional consequences of gyrification?

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

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

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

D. All of the above

D. All of the above

What do the vesicles develop into later?

A. Forebrain, midbrain, spinal cord

B. Forebrain, midbrain, cranium

C. Spinal cord, midbrain, progenitor of hindbrain

D. Forebrain, midbrain, progenitor of hindbrain

D. Forebrain, midbrain, progenitor of hindbrain

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

A. anencephaly.

B. spina bifida.

C. polymicrogyria.

D. microencephaly.

C. polymicrogyria.

What process creates the cauda equina?

A. Growth of somites delays spinal cord development.

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

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

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

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

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

A. medially, dorsally

B. ventromedially, dorsolaterally

C. dorsally, medially

D. dorsolaterally, ventromedially

B. ventromedially, dorsolaterally

Which statement regarding synaptogenesis and neural pruning is false?