| A | B |
|---|
| Gray matter | Collections of nerve cell bodies and their associated neuroglia |
| White matter | Bundles of parallel axons and their sheaths |
| Decussation | A crossing over |
| Vital functions | Those functions of the body necessary for life on a short-term basis |
| Commissures | Connections of nerve fibers which allow the two hemispheres of the brain to communicate with one another |
| Hypoxia | A condition in which the brain is not getting enough oxygen due to a poor blood supply |
| Hypoglycemia | A condition in which the glucose levels in the blood get too low |
| Pons, Medulla, and Midbrain | The three sections of the brainstem |
| Hypothalamus and Thalamus | These structures are part of the diencephalon |
| Pons | This structure relays messages from the cerebrum to the cerebellum |
| Hypothalamus | This structure controls the pituitary gland |
| Thalamus | This structure performs a crude interpretation of sensory information and then relays that information to the cerebrum |
| Cerebellum | This structure deals with subconscious motor functions |
| Corpus Callosum | This structure allows the two hemispheres of the brain to communicate with each other |
