TY - RPRT TI - Changes in synaptic morphology associated with presynaptic and postsynaptic activity: an in vitro study of the electrosensory organ of the thornback ray. AU - R D Fields AU - M H Ellisman AU - S G Waxman PY - 1987 DO - 10.1002/syn.890010407 UR - https://pubmed.ncbi.nlm.nih.gov/2901790/ ID - 2901790 ER -