Why the maternal brain

摘要: In the rat, change from a virgin/nulliparous female to maternal animal takes place at many levels. A subtle developmental wave washes over nervous system and transforms her largely self-centred offspring-directed, personal care protection of genetically-related offspring, indifference ardour. Such is preceded by substantial apparently permanent neural alterations, depth which results in brain, basis present review. The neuroplasticity pregnancy, inherent brain and, we believe, representative full expression system's capacity, result significant hormonal other neurochemical actions. It striking changes that are associated with, necessary for, successful reproduction. We discuss some these their ramifications. Collectively, they represent culmination mammalian evolution have led development social characteristic higher orders mammal, including human. also examine different facets beginning with review genes involved behaviour, subsequent 'expression' brain. next olfaction manner this major sense draws rich sensory milieu mother regulate support behaviour. Last, 'whys' theoretical foray into reasons for such alterations. focus on male's potential role as raison d'etre manifest alterations his mate's end, it clear undergoes reorganisation en route motherhood, deep enduring.