The brain's normal pain-sensory system, in which nerve endings send messages to the brain about a threat, goes awry in migraines.

WSJ: Fresh Target in Hunt for a Migraine Cure

The unpleasant feedback from exercising, such as difficulty breathing, sweating or stiff muscles, is transferred to the brain using the afferent, or sensory, nervous system.

WSJ: Optimal Music for the Gym

The reasonable investor, like the reasonable person in other tort suits, is an invention of the U.S. court system who generally possesses the extra-sensory power to detect, in advance, every bad outcome that might come from a certain course of action.

FORBES: 'Pro-Business' Supreme Court Defies Critics Again

Without this system, we'd be drowned in a sensory overload.

ECONOMIST: MONITOR

Malcolm MacIver and colleagues at Northwestern University have created an "artificial electric-field sensing system that could ultimately give robotic subs the same additional sensory capabilities" as found in weakly electric fish.

ENGADGET: Robotic submersibles take on fish-like sensing abilities