has part has part has_part occurs in occurs in characteristic of part of has modifier glutamate secretion synapse decreased neurotransmitter release abnormal synaptic glutamate release decreased synaptic glutamate release MPheno.ontology reduced synaptic glutamate release reduced secretion across synapses of the major excitatory neurotransmitter of the central nervous system (CNS), which acts through both ligand gated ion channels (ionotropic receptors) and G protein-coupled (metabotropic) receptors MP:0004495 abnormal decreased rate