abnormal synaptic vesicle recycling MP:0004770 MPheno.ontology any functional anomaly in the process of the fusion of a subpopulation of synaptic vesicles with the cell membrane at the active zone, the subsequent endocytosis back from the plasma membrane, the refilling of these vesicles with neurotransmitters, and trafficking back to the active zone pool of vesicles abnormal neuron physiology