Symptoms can include palpitations, dizziness, fainting, shortness of breath, anxiety, sweating, and chest discomfort or pain. Certain triggers such as exercise, stress, caffeine, or alcohol ...

"The prevailing theory suggested a single pathway, where short-term memories were consolidated into long-term memories.

These intracellular signaling pathways, also called signal transduction ... signals — including neurotransmitters — travel only a short distance, but others must go much farther to reach ...