Fight or Flight: The Sympathetic Nervous System

When facing down a ferocious lion, an oncoming car or maybe just an impending deadline, our bodies trigger a physical stress response that prepares us to either fight or flee the scene. This "fight-or-flight" response is driven by the sympathetic nervous system, a normally harmonized network of brain structures, nerves…

Scientists unlock new role for nervous system in regeneration: Researchers were able to explain, predict, and even manipulate regeneration of the flatworm body

Biologists at Tufts University have developed a computational model of planarian (flatworm) regeneration that explains how fragments of planaria determine which end should form a tail and which should form a head. The development begins to answer an important question in regeneration research — what are the signals that determine…