A longstanding hypothesis in neurobiology was that a single neuron releases a single type of neurotransmitter, a molecule used by neurons to communicate with one another. In recent decades, several ...

In 1921, Otto Loewi woke from a dream with the idea for an experiment that proved nerves communicate using chemicals, not just electricity. By showing that stimulating one frog’s heart released a ...

When a person thinks, speaks, eats, walks, or just sits comfortably with all bodily systems functioning normally, the billions of cells that make up the brain and the rest of the nervous system are ...