part of part of hypothalamus regional part of brain posterior hypothalamic region GAID:651 Wikipedia:Mammillary_process posterior hypothalamus mammillary region UBERON:0002770 BAMS:PH BIRNLEX:1651 MESH:D007034 HBA:4665 BAMS:PHR FMA:62029 The part of the hypothalamus posterior to the middle region consisting of several nuclei including the medial mamillary nucleus, lateral mamillary nucleus, and posterior hypothalamic nucleus (posterior hypothalamic area). The posterior hypothalamic area is concerned with control of sympathetic responses and is sensitive to conditions of decreasing temperature and controls the mechanisms for the conservation and increased production of heat. mammillary level of hypothalamus