parvocellular red nucleus parvocellular red nucleus the parvocellular red nucleus (rnp) is located in the rostral midbrain and is involved in motor coordination. together with the magnocellular red nucleus, it makes up the red nucleus. parvocellular red nucleusidentifiersneurolex idbirnlex_725anatomical terms of neuroanatomy identifiersneurolex idbirnlex_725anatomical terms of neuroanatomy