NETTER - Neuroscience Flash Cards

Brain Stem Surface Anatomy:
Posterolateral View
1. Trochlear nerve (CN IV)
2. Facial nerve (CN VII)
3. Inferior cerebellar peduncle
4. Vestibular area
5. Olive
6. Hypoglossal trigone
7. Vagal trigone
8. Gracile tubercle
9. Cuneate tubercle
10. Facial colliculus
11. Medial eminence
12. Superior medullary velum
13. Inferior colliculus
14. Superior colliculus
Comment: Eminences, tubercles, trigones, and regions of brain
stem on the floor of the fourth ventricle or regions adjacent to the
fourth ventricle denote the presence of important underlying nuclei
and associated pathways (gracile and cuneate tubercles—nuclei
gracilis and cuneatus; vestibular area—vestibular nuclei; hypoglossal
and vagal trigones—CN nuclei XII and X; facial colliculus—CN
nucleus VI [abducens] and dorsally looping axons of CN VII arising
from CN nucleus VII). Involvement of these brain stem regions
from tumors, infarcts, or other damage is reflected by specific
deficits related to the functions of the underlying sensory, motor, or
autonomic nuclei and pathways.
Overview of the Nervous System See book 4.1