Newborn crawling and rooting in response to maternal breast odor

Area of Science:

• Developmental Psychology
• Neuroscience
• Infant Motor Development

Background:

• Perception and action are tightly coupled in newborns.
• Early sensory experiences shape infant development and behavior.

Purpose of the Study:

• To examine the coupling between maternal olfactory stimuli and newborn crawling and rooting behaviors.
• To investigate the adaptability of motor circuitry to olfactory information in neonates.

Main Methods:

• 28 two-day-old newborns were studied on a mobility device (Crawliskate®).
• Behavioral analysis involved olfactory stimuli from maternal breast odor versus a control (water).
• Video and 3D kinematic analyses quantified limb movements, displacement, and head rooting.

Main Results:

• Newborns showed significantly more efficient crawling (greater distance, fewer movements) with maternal odor.
• Head rooting movements were significantly increased in the presence of maternal odor.
• Olfactory information differentiated the coupling between olfaction and locomotion/rooting systems.

Conclusions:

• Newborn motor circuitry (locomotion, rooting) is adaptable to olfactory input via higher brain processing.
• The coupling between olfaction and these action systems is differentiated early in life.
• Maternal odors may stimulate mobility in infants at risk for motor delays or deprived of scent.