#$%^&*AU2012201103A120120322.pdf#####C WRPonbl\DCC\ATM4O85749_j.DOC-O/0fl/2012 ABSTRACT Evaluating human central nervous system neuron health by (a) administering to a patient a population of molecular complexes comprising (i) a polypeptide capable of activating neuronal endocytosis, axonal transport, and synaptic transfer, and (ii) an imaging agent suited for determining location and evaluating neuronal transport of said molecular complexes, within said patient, and (b) using at least one imaging method to determine location and evaluate neuronal transport of said molecular complexes, within said patient.