Development of the Nervous System Flashcards Preview

Pathology > Development of the Nervous System > Flashcards

Flashcards in Development of the Nervous System Deck (19):
1

What cell layer does the nervous system develop from?

Ectoderm

2

What is the cell layer origin of the notochord?

Mesoderm

3

Telencephalon forms...

Cerebral cortex, basal ganglia, amygdala, hippocampus

4

Diencephalon forms...

Thalamus and hypothalamus

5

Mesencephalon forms...

Midbrain

6

Metencephalon forms...

Pons and cerebellum

7

Myelencephalon forms....

Medulla

8

What does the mantle zone eventually form?

Gray Matter

9

What does the marginal zone eventually form?

White Matter

10

Alar Plate

Sensory

11

Basal Plate

Motor

12

What types of nervous fibers are found in the dorsal horn?

GVA and GSA

13

Spina Bifida Occulta

Mostly benign but there is not complete formation of the vertebrae

14

Spina Bifida Cystica

Neningocele and meningomyeloceles where there are protrusions of the spinal cord

15

Exencephaly

The failure of the cephalic (rostral) neural tube to close, and results in failure of the skull to form, thus leaving the malformed brain exposed. The brain tissue typically becomes necrotic leading to anencephaly. This condition is incompatible with life, even though the brainstem often remains intact.

16

Hydrocephalus

Abnormal accumulation of CSF within the ventricular system can lead to hydrocephaly. In newborns, it is typically due to blockage or narrowing of the aqueduct of Sylvius.

17

Dandy‐Walker Syndrome

Congenital abnormality of the fourth ventricle with failure of foramens Luschka & Magendie to form, resulting in an enlargement of the fourth ventricle

18

Arnold‐Chiari Syndrome

It is a caudal displacement and herniation of the posterior cranial fossa structures, namely the cerebellum, through the foramen magnum.

19

Microcephaly

A cranial vault that is smaller than normal. This is normally due to a lack of brain development. Impaired mental development is associated with more than 50% of these cases.

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