Embryology III Flashcards Preview

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Flashcards in Embryology III Deck (20)
1

What is a Chiari II (Arnold-Chiari malformation)?

Significant cerebellar tonsillar and vermian herniation through the foramen magnum with aqueductal stenosis and hydrocephalus (p.409)

2

What are two clinical findings in a patient with a Chiari II malformation?

Thoraco-lumbar myelomeningocele and paralysis below the defect (p.409)

3

What is a dandy walker malformation?

Agenesis of the cerebellar vermis with cystic enlargement of the fourth ventricle (which fills the posterior fossa) (p.409)

4

What is Dandy Walker malformation associated with?

Hydrocephalus and spina bifida (p.409)

5

What is syringomyelia?

Cystic enlargement of central canal of the spinal cord (p.410)

6

What spinal cord fibers are typically damaged first in syringomyelia?

Crossing fibers of the spinothalamic tract (p.410)

7

What are the clinical symptoms associated with syringomyelia?

Cape-like bilateral loss of pain and temperature in the upper extremities; fine touch sensation is preserved (p.410)

8

What condition is syringomyelia associated with?

Chiari I malformation (with greater than 3-5mm cerebellar tonsillar ectopia) (p.410)

9

What is the most common site for syringomyelia?

C8-T1 (p.410)

10

From where is the anterior 2/3 of the tongue derived?

The first branchial arch (p.410)

11

What nerve provides sensation to the anterior 2/3 of the tongue?

CN V3 (p.410)

12

What nerve provides taste sensation to the anterior 2/3 of the tongue?

CN VII (p.410)

13

From where is the posterior 1/3 of the tongue derived?

3rd and 4th branchial arches (p.410)

14

What nerve provides taste and sensation to the posterior 1/3 of the tongue?

CN IX (p.410)

15

What nerve provides taste and sensation to the extreme posterior of the tongue?

CN X (p.410)

16

What nerve provides motor innervation of the tongue?

CN XII (p.410)

17

From where are the muscles of the tongue derived?

From occipital myotomes (p.410)

18

What cranial nerves contribute to taste sensation?

CN VII, IX, X (p.410)

19

What cranial nerves contribute to pain of the tongue?

CN V3, IX, X (p.410)

20

What nucleus is responsible for taste sensation?

Solitary nucleus (p.410)