Mini-Quiz: Neurotransmitters

What is by far the most abundant and ubiquitous neurotransmitter in the mammalian central nervous system and plays a central role in mediating nearly all forms of brain function? Take the poll and join the discussion. 

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Answer C. Glutamate
Research has demonstrated that glutamate plays a central role in mediating nearly all forms of brain function, including cognition, perception, learning, and emotion. For more on this topic, see "Ketamine-Induced Optimism: New Hope for the Development of Rapid-Acting Antidepressants," by Gerard Sanacora, MD, PhD.