Brain Stem

**Semantic type:** Body Part, Organ, or Organ Component

**Definition:** Three sections, the midbrain, pons and medulla oblongata, that are located at the base of the brain. The brain stem regulates the central nervous system, and is vital as a conduit for motor and sensory innervations.

**Synonyms:** - BRAIN STEM - BRAIN, BRAIN STEM - Brain stem - Brain, Brain stem - Brainstem - Brainstem - Brainstem - Brainstem structure (body structure) - brain stem - brain stem - brainstem - truncus encephali