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
The name of the largest commisure on the cerebrum?
Corpus Callosum
What are the 4 surface lobes of the cerebrum?
Frontal, Parietal, Occipital, Temporal
What lobe is buried in the lateral fissure?
Insular lobe
What sulcus divides the frontal and parietal lobes?
Central
What sulcus divides the frontal and temporal lobes?
Lateral
What sulcus divides the parietal and temporal lobes?
Lateral
What sulcus divides the parietal and occipital lobes?
Parieto-occipital
