The Midbrain

SOURCE:http://www.cartage.org.lb/en/themes/sciences/lifescience/generalbiology/physiology/nervoussystem/Brain/Brain.htm

The midbrain or mesencephalon (from the Greek mesos - middle, and enkephalos - brain^[1]) is a portion of the central nervous system associated with vision, hearing, motor control, sleep/wake, arousal (alertness), and temperature regulation.^[2]

^{SOURCE: http://en.wikipedia.org/wiki/Midbrain}

SOURCE: http://kenowapsychology.wikispaces.com/Functions+of+the+Midbrain