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All animals use their sensory organs to scan the environment in search of information. Often these organs are actively oriented toward relevant targets. This orienting behavior is exhibited by creatures from honey bees to humans. Movement of the eyes, for…
The mesencephalon, or midbrain, is the most rostral portion of the brainstem. It gives rise to cranial nerves III and IV, conducts ascending and descending tracts, and contains nuclei that are essential to motor function. Caudally the midbrain is continuous…