brain stem: cranial nerve nuclei

Question 1

• brain stem nuclei
• reticular formation
• longitudinal fiber tracts
• chemically identified

Answer 1

functional organization

Question 2

fiber tracts are the same ones talked about in ascending/descending tracts of the spinal cord

Answer 2

longitudinal fiber tracts

Question 3

• start with the development of the spinal cord and move rostral
• the dorsal portion of the neural tube starts to thin and eventually splits
• the side starts to move apart

Answer 3

developmental sequence

Question 4

the special senses are added especially the auditory system and room must be made for them

Answer 4

medulla expands

Question 5

there is an expansion of all the tracts entering the brain, so the white matter expands to accommodate the tracts

Answer 5

adding white matter tracts

Question 6

reticular formation expands from the center outward past the visceral somatic portions

Answer 6

adding reticular formation

Question 7

• nuclei or cell bodies of the cranial nerves
• everything comes into the brain stem or leaves the brain stem through these nuclei
• the nuclei of the brain stem are situated in the same functional columns that we saw in the spinal cord
• visceral and somatic information is also separate

Answer 7

brain stem nuclei