NRG1 and schizophrenia: One study, which evaluated association of neuregulin 1 gene (NRG1) assumed to be involved in glutamate neurotransmission and neurodevelopment (gliogenesis, neuronal migration and synaptic plasticity), found it to be associated with non-deficit schizophrenia, but not deficit schizophrenia, indicating a neurodevelopment cause in non-deficit schizophrenia, but not in deficit schizophrenia.[65]