Malinina E, Druzin M, Johansson S. Differential control of spontaneous and evoked GABA release by presynaptic L-type Ca channels in the rat medial preoptic nucleus. J Neurophysiol 104: 200–209, 2010. First published May 12, 2010; doi:10.1152/jn.00570.2009. To clarify the role of presynaptic L-type Ca channels in GABA-mediated transmission in the medial preoptic nucleus (MPN), spontaneous, minia...