Cover illustration

March 13, 2001; 98 (6)
Cover image expansion

Cover image: Excitatory synaptic connections in a portion of a hippocampal neuron reconstructed from serial electron micrographs. Shown are colored axonal varicosities that form synaptic contacts with dendritic spines of the neuron (white). Varicosities that form one synaptic connection, blue; multiple connections with different neurons, green; multiple connections within the same neuron, yellow. Spines from different neurons are orange. See paper by Yankova et al. on pages 3525–3530 in this issue.