Neonatal sucking behaviour and its development until 14 months

Area of Science:

• Pediatrics
• Developmental Biology
• Infant Nutrition

Background:

• Sucking is a critical infant reflex for feeding and development.
• Understanding the developmental trajectory of sucking behavior is essential for assessing infant health.
• Previous research has not fully detailed the dynamic changes in sucking mechanics over the first year.

Purpose of the Study:

• To document the developmental changes in infant sucking behavior from birth to 14 months.
• To identify specific kinematic and morphological alterations in sucking patterns over time.
• To establish a normative developmental course for sucking mechanics.

Main Methods:

• Utilized a novel fiberscope-supported holder for filming neonatal sucking.
• Observed 57 low-risk, full-term infants longitudinally from birth to 14 months.
• Analyzed video recordings to quantify changes in tongue peristalsis, cavity depth, and nipple wrapping.

Main Results:

• Neonatal sucking exhibits a distinct bell shape from tongue peristalsis, decreasing significantly by 10 months.
• Tongue-induced cavity depth increases until 8 months, then declines.
• Tongue root wrapping of the nipple weakens progressively, diminishing by 6 months.
• Transition from neonatal to older infant sucking patterns typically occurs around the third month, with individual variations.

Conclusions:

• Infant sucking behavior undergoes a distinct developmental progression during the first year of life.
• Specific kinematic changes in tongue movement and nipple interaction characterize this development.
• The third month is a critical period for the transition in sucking patterns, indicating significant neurodevelopmental maturation.