Gross Anatomy of CNS Flashcards
What are the 2 enlargements of the spinal cord?
Cervical + Lumbosacral
What divides the spinal cord into R + L halves?
Dorsal median sulcus
Brain stem is composed of what 3 structures?
Midbrain + Pons + Medulla
What 4 cranial nerves exit out the Medulla?
9, 10, 11, 12 - Glossopharyngeal, Vagus, Accessory, Hypoglossal
What is the name of the location where “fibers cross” in the medulla?
Pyramidal decussation
What 2 structures help make up the floor of the 4th ventricle?
Medulla + Pons
What 4 cranial nerves exit off of the Pons?
Trigeminal(5), Abducens (6), Facial (7), Vestibulocochlear (8)
What cranial nerves exit off the Midbrain?
Oculomotor (3) - off ventral side
Trochlear (4) - dorsal side
The dorsal side of the midbrain has 4 “bumps”, what are they called individually and collectively?
Top 2 = Superior colliculi
Bottom 2 = inferior colliculi
All 4 = TECTUM
The area between the 2 crus cerebri is called what?
Interpedicular fossa
Ridges on cerebral cortex are called:
Gyri
Grooves on cerebral cortex are called:
Sulci
Area between 2 hemispheres of Cerebellum are called:
Vermis
What are located in the junction between vermis and cerebellar hemispheres in the cerebellum?
Tonsils
what is a cause of TONSILAR HERNIATION?
Increased ICP can cause the tonsils to herniate through the foramen magnum and push on brainstem
