[biological_process] axon guidance <sep> axonal fasciculation <sep> brain development <sep> embryo development ending in birth or egg hatching <sep> ephrin receptor signaling pathway <sep> G protein-coupled acetylcholine receptor signaling pathway <sep> ionotropic glutamate receptor signaling pathway <sep> neuron cell-cell adhesion <sep> neuron differentiation <sep> neuron migration <sep> neuron projection development <sep> positive regulation of microtubule polymerization <sep> positive regulation of neuron apoptotic process <sep> regulation of dendritic spine morphogenesis <sep> rhythmic process