1. Department of Physiology and Biophysics, SUNY at Stony Brook, Stony Brook, NY 11794‐8661, USA,
2. Institut Fédératif de Neurobiologie Alfred Fessard, Laboratoire Neurobiologie Cellulaire et Moléculaire, UPR 9040, CNRS, 91198 Gif‐sur‐Yvette cedex, France
3. Laboratorio de Fisiología de La Conducta, Facultad de Medicina, Universidad de Los Andes, Mérida 5101, Venezuela