Nervous system extra

Question 1

What do the neural crest cells from the cranial mesencephalon and caudal proencephalon give rise to?

Answer 1

1. Parasympathetic ganglia of CN III
2. Connective tissue around eyes and optic nerves
3. Muscles of pupil and ciliary body
4. Head mesenchyme cranial to mesencephalon including pia mater and arachnoid of occipital region

Question 2

What do neural crest cells from mesencephalon and rhombencephalon contribute to?

Answer 2

1. The devloping pharyngeal arches
2. bones of the face and middle ear
3. Dermis and smooth m.’s of face
4. Odontoblasts

Question 3

What do neural crest cells from rhomencephalon give rise to?

Answer 3

1. Cranial nerve ganglia
2. All glial cells of the sensory ganglia CN V-X

Question 4

What do occipital and spinal neural crest cells differentiate into?

Answer 4

1. Peripheral sensory neurons (dorsal root ganglia)
2. Parasympathetic and sympathetic peripheral motor neurons