Abstract:
:Mammalian females have long been known to release olfactory attraction in their offspring. Mammary odor cues control infant state, attention and directional responses, delay distress responses, stimulate breathing and positive oral actions, and finally can boost learning. Here, we survey female-offspring odor communication in two mammalian species - European rabbits and humans - taken as representatives of evolutionary extremes in terms of structure and dynamics of mother-infant relations, and level of neonatal autonomy. Despite these early psychobiological differences, females in both species have evolved mammary structures combining multiple sources of endogenous and exogenous odorants, and of greasy fixatives, conferring on them a chemocommunicative function. To process these mammary chemosignals, neonates have co-evolved multiple perceptual mechanisms. Their behaviour appears to be driven by plastic mechanism(s) calibrated by circumstantial odor experience in preceding and current environments (fetal and postnatal induction of sensory processes and learning), and by predisposed mechanisms supported by pathways that may be hard-wired to detect species-specific signals. In rabbit neonates, predisposed and plastic mechanisms are working inclusively. In human neonates, only plastic mechanisms could be demonstrated so far. These mammary signals and cues confer success in offspring's approach and exploration of maternal body surface, and ensuing effective initial feeds and rapid learning of maternal identity. Although the duration of the impact of these mammary signals is variable in newborns of species exposed to contrasting life-history patterns, their functional role in setting on infant-mother interaction in the context of milk transfer can be crucial.
journal_name
Behav Brain Resjournal_title
Behavioural brain researchauthors
Schaal B,Coureaud G,Doucet S,Delaunay-El Allam M,Moncomble AS,Montigny D,Patris B,Holley Adoi
10.1016/j.bbr.2009.02.008subject
Has Abstractpub_date
2009-06-25 00:00:00pages
346-58issue
2eissn
0166-4328issn
1872-7549pii
S0166-4328(09)00102-8journal_volume
200pub_type
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