3 brainstem

Question 1

anterior Medulla structures

Answer 1

Pyramidal decussation,

Olive

Question 2

posterior medulla structures

Answer 2

Obex, Cuneate tubercle,
Gracile tubercle,Sulcus limitans
Hypoglossal trigone
Vagal trigone
Facial colliculus

Question 3

Pons

Answer 3

Basal pons (BP)
Middle cerebellar peduncle (brachium pontis)
V, VI
Facial nerve: motor, sensory and intermediate roots VII
Vestibulocochlear nerve VIII
Superior cerebellar peduncle (brachium conjunctivum)
Lateral lemniscus

Question 4

midbrain structures

Answer 4

Cerebral aqueduct
Superior colliculus (gray matter tectum, visual attention, eye movements) rosral midbrain

Inferior colliculus (auditory pathway) caudal midbrain
Cerebral peduncles
III, IV
Inferior brachium (connects inferior colliculus to auditory pathway

Question 5

Any brainstem level (rostral to obex) has three areas

Answer 5

Tegmentum: Tissue anterior to ventricle (all CNs are here)
Tectum (“roof”): Tissue posterior to ventricle
Stuff added onto anterior surface

Question 6

Caudal vs. Rostral Midbrain

Answer 6

caudal:
 Inferior colliculi
IV
Decussation of SCP
rostral:
Superior colliculi
III
Red nucleus
Substantia nigra

Question 7

caudal pons

Answer 7

Inferior cerebellum peduncle: mostly within cerebellum at this level
Middle cerebellar peduncle attaches pons to cerebellum
ML: horizontal with feet lateral (compare to rostral medulla)
Fourth ventricle present

Question 8

rostral pons

Answer 8

Superior cerebellar peduncle
ML: horizontal with feet lateral, approaches STT
Small ventricle space: at opening of aqueduct

Question 9

caudal medulla

Answer 9

Central canal
Graclie and cuneate nuclei & tracts
Internal arcuate fibers form medial lemniscus
Pyramidal decussation

Question 10

rostral medulla

Answer 10

Fourth ventricle
Inferior olivary nuclei
XII
Internal arcuate fibers from IO to ICP
Pyramids