NEUROANATOMY FULL EXAM + ANSWERS: 200 UNIVERSITY LEVEL MULTIPLE CHOICE
QUESTIONS WITH RATIONALES
SECTION 1: EMBRYOLOGY AND DEVELOPMENT OF THE NERVOUS SYSTEM
(QUESTIONS 1-20)
1. The neural plate first appears during which week of embryonic development?
A. Week 1
B. Week 2
C. Week 3
D. Week 5
Rationale: The neural plate forms from the ectoderm during the third week, marking the
beginning of neurulation.
2. The process by which the neural plate folds to form the neural tube is called:
A. Gastrulation
B. Neurulation
C. Myelination
D. Synaptogenesis
Rationale: Neurulation is the embryonic process that transforms the neural plate into the
neural tube.
3. The cranial neuropore normally closes by which day of development?
A. Day 18
B. Day 20
C. Day 25
D. Day 30
,Rationale: The cranial neuropore closes around day 25, while the caudal neuropore closes
around day 27.
4. Failure of the caudal neuropore to close results in:
A. Anencephaly
B. Spina bifida
C. Holoprosencephaly
D. Agenesis of the corpus callosum
Rationale: Defective closure of the caudal neuropore produces spina bifida, whereas
cranial neuropore failure causes anencephaly.
5. The neural crest cells give rise to all of the following EXCEPT:
A. Dorsal root ganglia
B. Schwann cells
C. Oligodendrocytes
D. Melanocytes
Rationale: Oligodendrocytes derive from the neural tube, not from neural crest cells.
6. The alar plate develops into which functional region of the spinal cord?
A. Dorsal horn
B. Ventral horn
C. Lateral horn
D. Central canal
Rationale: The alar plate becomes the dorsal horn, which is sensory in function.
7. The basal plate of the developing spinal cord gives rise to:
A. Dorsal horn
B. Ventral horn
C. Roof plate
D. Floor plate
Rationale: The basal plate forms the ventral horn, which contains motor neurons.
8. The telencephalon develops from which primary brain vesicle?
A. Rhombencephalon
B. Mesencephalon
C. Prosencephalon
D. Metencephalon
Rationale: The prosencephalon divides into the telencephalon and diencephalon.
,9. The metencephalon gives rise to the:
A. Thalamus and hypothalamus
B. Pons and cerebellum
C. Medulla oblongata
D. Midbrain
Rationale: The metencephalon develops into the pons and cerebellum.
10. The myelencephalon develops into the:
A. Pons
B. Cerebellum
C. Medulla oblongata
D. Midbrain
Rationale: The myelencephalon forms the medulla oblongata.
11. The mesencephalon develops into the:
A. Pons
B. Midbrain
C. Medulla
D. Thalamus
Rationale: The mesencephalon remains as the midbrain in the adult.
12. The cavity of the diencephalon becomes the:
A. Lateral ventricles
B. Third ventricle
C. Cerebral aqueduct
D. Fourth ventricle
Rationale: The diencephalic cavity forms the third ventricle.
13. The cavity of the rhombencephalon becomes the:
A. Third ventricle
B. Cerebral aqueduct
C. Fourth ventricle
D. Lateral ventricles
Rationale: The rhombencephalic cavity develops into the fourth ventricle.
14. The cerebral aqueduct connects which two ventricles?
A. Lateral and third
B. Third and fourth
, C. Fourth and central canal
D. Lateral and fourth
Rationale: The cerebral aqueduct (aqueduct of Sylvius) connects the third and fourth
ventricles.
15. Microglia originate from:
A. Neural crest
B. Neural tube
C. Mesoderm
D. Endoderm
Rationale: Microglia arise from mesodermal precursors, specifically yolk sac
macrophages.
16. The corpus callosum begins to develop at approximately:
A. Week 4
B. Week 6
C. Week 10 to 12
D. Week 20
Rationale: The corpus callosum begins forming around weeks 10 to 12 of gestation.
17. Agenesis of the corpus callosum is best described as:
A. Destruction of the corpus callosum after birth
B. Congenital absence of the corpus callosum
C. Thickening of the corpus callosum
D. Partial myelination of the corpus callosum
Rationale: Agenesis refers to congenital absence of the corpus callosum.
18. The choroid plexus is derived primarily from:
A. Neural crest cells
B. Ependymal cells and vascular mesenchyme
C. Schwann cells
D. Astrocytes only
Rationale: The choroid plexus consists of ependymal cells covering vascularized pia mater.
19. The neural tube defect anencephaly results from failure of closure of the:
A. Caudal neuropore
B. Cranial neuropore
QUESTIONS WITH RATIONALES
SECTION 1: EMBRYOLOGY AND DEVELOPMENT OF THE NERVOUS SYSTEM
(QUESTIONS 1-20)
1. The neural plate first appears during which week of embryonic development?
A. Week 1
B. Week 2
C. Week 3
D. Week 5
Rationale: The neural plate forms from the ectoderm during the third week, marking the
beginning of neurulation.
2. The process by which the neural plate folds to form the neural tube is called:
A. Gastrulation
B. Neurulation
C. Myelination
D. Synaptogenesis
Rationale: Neurulation is the embryonic process that transforms the neural plate into the
neural tube.
3. The cranial neuropore normally closes by which day of development?
A. Day 18
B. Day 20
C. Day 25
D. Day 30
,Rationale: The cranial neuropore closes around day 25, while the caudal neuropore closes
around day 27.
4. Failure of the caudal neuropore to close results in:
A. Anencephaly
B. Spina bifida
C. Holoprosencephaly
D. Agenesis of the corpus callosum
Rationale: Defective closure of the caudal neuropore produces spina bifida, whereas
cranial neuropore failure causes anencephaly.
5. The neural crest cells give rise to all of the following EXCEPT:
A. Dorsal root ganglia
B. Schwann cells
C. Oligodendrocytes
D. Melanocytes
Rationale: Oligodendrocytes derive from the neural tube, not from neural crest cells.
6. The alar plate develops into which functional region of the spinal cord?
A. Dorsal horn
B. Ventral horn
C. Lateral horn
D. Central canal
Rationale: The alar plate becomes the dorsal horn, which is sensory in function.
7. The basal plate of the developing spinal cord gives rise to:
A. Dorsal horn
B. Ventral horn
C. Roof plate
D. Floor plate
Rationale: The basal plate forms the ventral horn, which contains motor neurons.
8. The telencephalon develops from which primary brain vesicle?
A. Rhombencephalon
B. Mesencephalon
C. Prosencephalon
D. Metencephalon
Rationale: The prosencephalon divides into the telencephalon and diencephalon.
,9. The metencephalon gives rise to the:
A. Thalamus and hypothalamus
B. Pons and cerebellum
C. Medulla oblongata
D. Midbrain
Rationale: The metencephalon develops into the pons and cerebellum.
10. The myelencephalon develops into the:
A. Pons
B. Cerebellum
C. Medulla oblongata
D. Midbrain
Rationale: The myelencephalon forms the medulla oblongata.
11. The mesencephalon develops into the:
A. Pons
B. Midbrain
C. Medulla
D. Thalamus
Rationale: The mesencephalon remains as the midbrain in the adult.
12. The cavity of the diencephalon becomes the:
A. Lateral ventricles
B. Third ventricle
C. Cerebral aqueduct
D. Fourth ventricle
Rationale: The diencephalic cavity forms the third ventricle.
13. The cavity of the rhombencephalon becomes the:
A. Third ventricle
B. Cerebral aqueduct
C. Fourth ventricle
D. Lateral ventricles
Rationale: The rhombencephalic cavity develops into the fourth ventricle.
14. The cerebral aqueduct connects which two ventricles?
A. Lateral and third
B. Third and fourth
, C. Fourth and central canal
D. Lateral and fourth
Rationale: The cerebral aqueduct (aqueduct of Sylvius) connects the third and fourth
ventricles.
15. Microglia originate from:
A. Neural crest
B. Neural tube
C. Mesoderm
D. Endoderm
Rationale: Microglia arise from mesodermal precursors, specifically yolk sac
macrophages.
16. The corpus callosum begins to develop at approximately:
A. Week 4
B. Week 6
C. Week 10 to 12
D. Week 20
Rationale: The corpus callosum begins forming around weeks 10 to 12 of gestation.
17. Agenesis of the corpus callosum is best described as:
A. Destruction of the corpus callosum after birth
B. Congenital absence of the corpus callosum
C. Thickening of the corpus callosum
D. Partial myelination of the corpus callosum
Rationale: Agenesis refers to congenital absence of the corpus callosum.
18. The choroid plexus is derived primarily from:
A. Neural crest cells
B. Ependymal cells and vascular mesenchyme
C. Schwann cells
D. Astrocytes only
Rationale: The choroid plexus consists of ependymal cells covering vascularized pia mater.
19. The neural tube defect anencephaly results from failure of closure of the:
A. Caudal neuropore
B. Cranial neuropore
