Brain & CN Development

Question 1

In the 5th week of development, 3 swellings called ________ __________ appear at the cranial end of the neural tube

Answer 1

primitive vesicles

Question 2

The three primitive vesicles give rise to all structures of

Answer 2

brain, cerebellum, and ventricular system

Question 3

Prosencephalon secondary vesicle(s)

Answer 3

telencephalon and diencephalon

Question 4

Mesencephalon secondary vesicle(s)

Answer 4

mesencephalon

Question 5

Rhombencephalon secondary vesicle(s)

Answer 5

metencephalon and myelencephalon

Question 6

Telencephalon neural derivatives

Answer 6

cerebral hemispheres and globus pallidus (cerebrum)

Question 7

Telencephalon cavity derivatives

Answer 7

lateral ventricle

Question 8

Diencephalon neural derivatives

Answer 8

Thalamus, hypothalamus, and epithalamus

Question 9

Diencephalon cavity derivatives

Answer 9

third ventricle (eye cup)

Question 10

Mesencephalon neural derivatives

Answer 10

midbrain

Question 11

Mesencephalon cavity derivatives

Answer 11

cerebral aqueduct

Question 12

Metencephalon neural derivatives

Answer 12

pons & cerebellum

Question 13

Metencephalon cavity derivatives

Answer 13

Upper part of 4th ventricle

Question 14

Myelencephalon neural derivatives

Answer 14

medulla

Question 15

Myelencephalon cavity derivatives

Answer 15

lower part of 4th ventricle/central canal

Question 16

Formation of brain flexures occurs during the 4th week due to

Answer 16

rapid growth & head folding

Question 17

Midbrain flexure (primary) occurs

Answer 17

early in the area of the mesencephalon

Question 18

Cervical flexure (primary) occurs

Answer 18

where the hindbrain meets the spinal cord

Question 19

Pontine flexure (secondary) occurs

Answer 19

posterior to the pons and medulla as the roof thins out & the 4th ventricle opens

Question 20

Choroid plexus

Answer 20

produces CSF

Question 21

How is the choroid plexus formed?

Answer 21

It comes from vascular pia mater

Question 22

Sensory is

Answer 22

dorsal & lateral

Question 23

Motor is

Answer 23

ventral & medial

Question 24

The alar plate and basal plate is separated by

Answer 24

sulcus limitans

Question 25

Myelencephalon motor components

Answer 25

Glossopharyngeal nerve, vagus nerve, accessory nerve, and hypoglossal nerve

Question 26

Myelencephalon sensory components

Answer 26

Glossopharyngeal nerve and vagus nerve

Question 27

Metencephalon motor components

Answer 27

Trigeminal nerve, abducens nerve, facial nerve

Question 28

Metencephalon sensory components

Answer 28

trigeminal nerve, facial nerve, vestibulocochlear nerve

Question 29

mesencephalon motor components

Answer 29

occulomotor nerve, trochlear nerve

Question 30

Mesencephalon sensory components

Answer 30

sensory cells of trigeminal nerve, mandibular division contains somatic afferents from muscles of mastication

Question 31

Telencephalon nerve

Answer 31

olfactory nerve

Question 32

diencephalon nerve

Answer 32

optic nerve

Question 33

Eye and optic nerve are outgrowths from

Answer 33

the diencephalon

Question 34

outer layer of optic cup will become

Answer 34

retinal pigment epithelium

Question 35

Inner layer of optic cup will become

Answer 35

neural retina