Diagram: Neurotransmitter - A chemical substance that is released at the junction of two neurons to transmit messages between neurons...
neurotransmitters
Image caption: For something that's so widespread, scientists know surprisingly little about the precise steps that lead to headaches. Image...
Photo caption: In the 1950s, a patient at Hillside mental hospital undergoes electroconvulsive therapy (ECT), which is used to treat...
