Neural Crest

Question 1

Formation

Answer 1

1. Strip of ectodermal cells along neural groove lateral edge
2. As neural folds fuse forming neural tube, the 2 neural crests fuse then separate as 2 longitudinal cords which migrate centrally to lie on each side of neural tube

Question 2

Derivatives CAPS NOD: 5S

Answer 2

1. Sensory ganglia of cranial nerves (5,7,9,10)
2. Suprarenal gland medulla (chromaffin cells)
3. Skin melanoblasts
4. Share in heart septa formation
5. Skeletal structures: bones and dermis of face

Question 3

Derivatives CAPS NOD: 4P

Answer 3

1. Peripheral parasympathetic ganglia in gut wall
2. Preaortic ganglia
3. Pia mater
4. Pupillary muscles

Question 4

Derivatives CAPS NOD: 2A

Answer 4

1. Arachnoid mater
2. Autonomic ganglia (sympathetic and parasympathetic)

Question 5

Derivatives CAPS NOD: 2C

Answer 5

1. Ciliary muscles
2. Carotid body

Question 6

Derivatives CAPS NOD: 1O

Answer 6

Odontoblast

Question 7

Derivatives CAPS NOD: 1D

Answer 7

Dorsal root ganglia of all spinal nerves

Question 8

Derivatives CAPS NOD: 1N

Answer 8

Neurilemmal (Schwann) cells of peripheral nerves