Organization of the brainstem

Question 1

which CN nuclei are associated with the midbrain?

Answer 1

1. oculomotor, EWN 2. trochlear 3. mesencephalic of V

Question 2

which CN nuclei are associated with the pons?

Answer 2

1. abducens 2. superior olfactory 3. motor, principal sensory, and spinal of V 4. facial motor

Question 3

which CN nuclei are associated with the medulla?

Answer 3

1. hypoglossal 2. dorsal motor of X 3. inferior salivatory 4. nucleus ambiguus 5. solitary nucleus of V 6. vestibular nuclei 7. cochlear nuclei 8. spinal nucleus of V

Question 4

embryologically, the alar plate makes up which type of nuclei - sensory or motor?

Answer 4

sensory

Question 5

embryologically, the basal plate makes up which type of nuclei - sensory or motor?

Answer 5

motor

Question 6

where is the sulcus limitans?

Answer 6

landmark in ventricular system and tegmentum of brain - divides sensory nuclei (dorsal) from motor nuclei (ventral)

Question 7

at what level do the sensory nuclei move from a dorsal position to a dorsolateral position?

Answer 7

pons and open rostral medulla

Question 8

which CN nuclei are found in the intermediate zone of the closed caudal medulla?

Answer 8

1. dorsal motor nucleus of vagus (CN 10) 2. nucleus ambiguus (CN 9, 10, 11) 3. nucleus solitarius (CN 9, 10)

Question 9

which CN nucleus is found in the medial zone of the open rostral medulla?

Answer 9

hypoglossal

Question 10

which CN nuclei are found in the dorsolateral zone of the open rostral medulla?

Answer 10

1. vestibular 2. cochlear

Question 11

which CN nuclei are found in the intermediate zone of the open rostral medulla?

Answer 11

1. dorsal motor nucleus of vagus 2. inferior salivatory (CN IX to parotid gland) 3. nucleus ambiguus (CNs IX, X to larynx and pharynx) 4. nucleus solitarius (CNs IX, X to taste)

Question 12

which CN nucleus is found in the medial zone of the pons?

Answer 12

abducens

Question 13

which CN nuclei are found in the dorsolateral zone of the pons?

Answer 13

vestibular and cochlear

Question 14

which CN nuclei are found in the intermediate zone of the pons?

Answer 14

1. facial 2. principal main sensory nucleus of trigeminal 3. mesencephalic nucleus of trigeminal 4. motor nucleus of trigeminal 5. superior salivatory nucleus (CN VII to sublingual, submandibular, palatine) 6. nucleus solitarius (CN VII to taste)

Question 15

which CN nuclei are found in the medial zone of the midbrain?

Answer 15

1. trochlear 2. oculomotor and EWN

Question 16

which CN nucleus is found in the intermediate zone of the midbrain?

Answer 16

mesencephalic nucleus of V

Question 17

what are the functions of the reticular formation?

Answer 17

1. regulation of level of consciousness, cortical alertness 2. control of somatic motor movements 3. regulatino of visceral motor or autonomic funcitons 4. control of sensory information

Question 18

the median zone of the medulla and pons are associated with what modalities?

Answer 18

sleep, suppression of pain

Question 19

the paramedian zone of the medulla and pons are associated with what modalities?

Answer 19

feedback of intricate movement

Question 20

the medial zone of the medulla and pons are associated with what modalities?

Answer 20

arousal, motor control of axial and proximal limbs, modulation of sensory transmission

Question 21

the lateral zone of the medulla and pons are associated with what modalities?

Answer 21

relays sensory information to medial zone of reticular formation

Question 22

the median zone of the midbrain is associated with what modalities?

Answer 22

sleep, suppression of pain

Question 23

what is the hallmark feature of the caudal midbrain?

Answer 23

decussation of superior cerebellar peduncle

Question 24

what is the hallmark feature of the rostral midbrain?

Answer 24

red nuclei