Offers research which analyzed the effect of neuregulins on the expression of genes encoding N-methyl-D-aspartate (NMDA) receptors in the cerebellum. How receptor composition changes as expression of the NR2C subunit is specifically induced in neurons in the internal granule-cell layer during synpatogenesis; Impact of the addition of neuregulin-beta isoform to cultured cerebellar slices on the expression of NR2C messenger RNA; Research method.