This document contains 5 citations related to synapses and neurotransmitters:
1. A 2002 study on spatial summation for single and multi-line motion stimuli.
2. The 2008 Gale Encyclopedia of Science entry on neurotransmitters.
3. The 2008 Gale Encyclopedia of Science entry on synapses.
4. A 2000 study on electrophysiological methods for assessing regional analgesia.
5. A 2009 article critiquing neurotransmitter testing methods.