Organization of the brainstem Flashcards
which CN nuclei are associated with the midbrain?
- oculomotor, EWN 2. trochlear 3. mesencephalic of V
which CN nuclei are associated with the pons?
- abducens 2. superior olfactory 3. motor, principal sensory, and spinal of V 4. facial motor
which CN nuclei are associated with the medulla?
- 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
embryologically, the alar plate makes up which type of nuclei - sensory or motor?
sensory
embryologically, the basal plate makes up which type of nuclei - sensory or motor?
motor
where is the sulcus limitans?
landmark in ventricular system and tegmentum of brain - divides sensory nuclei (dorsal) from motor nuclei (ventral)
at what level do the sensory nuclei move from a dorsal position to a dorsolateral position?
pons and open rostral medulla
which CN nuclei are found in the intermediate zone of the closed caudal medulla?
- dorsal motor nucleus of vagus (CN 10) 2. nucleus ambiguus (CN 9, 10, 11) 3. nucleus solitarius (CN 9, 10)
which CN nucleus is found in the medial zone of the open rostral medulla?
hypoglossal
which CN nuclei are found in the dorsolateral zone of the open rostral medulla?
- vestibular 2. cochlear
which CN nuclei are found in the intermediate zone of the open rostral medulla?
- 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)
which CN nucleus is found in the medial zone of the pons?
abducens
which CN nuclei are found in the dorsolateral zone of the pons?
vestibular and cochlear
which CN nuclei are found in the intermediate zone of the pons?
- 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)
which CN nuclei are found in the medial zone of the midbrain?
- trochlear 2. oculomotor and EWN
which CN nucleus is found in the intermediate zone of the midbrain?
mesencephalic nucleus of V
what are the functions of the reticular formation?
- 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
the median zone of the medulla and pons are associated with what modalities?
sleep, suppression of pain
the paramedian zone of the medulla and pons are associated with what modalities?
feedback of intricate movement
the medial zone of the medulla and pons are associated with what modalities?
arousal, motor control of axial and proximal limbs, modulation of sensory transmission
the lateral zone of the medulla and pons are associated with what modalities?
relays sensory information to medial zone of reticular formation
the median zone of the midbrain is associated with what modalities?
sleep, suppression of pain
what is the hallmark feature of the caudal midbrain?
decussation of superior cerebellar peduncle
what is the hallmark feature of the rostral midbrain?
red nuclei
