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Author Spotlight: Implications of Non-Nutritive Sucking on Speech Emergence and Infant Development
Published on: April 19, 2024
Patterned auditory stimulation and suck dynamics in full-term infants
Emily Zimmerman1, Megan Foran1
1Department of Communication Sciences & Disorders, Northeastern University, Boston, MA, USA.
Insights
Patterned auditory stimuli altered infant non-nutritive suck (NNS) dynamics, reducing burst duration and cycles per burst. Cardiorespiratory patterning remained unaffected by the acoustic stimulation.
Area of Science:
- Developmental neuroscience
- Infant behavior and development
- Auditory processing in infants
Background:
- Non-nutritive suck (NNS) is a fundamental infant behavior with a natural burst-pause pattern.
- Auditory stimuli can influence infant behaviors, but their effect on NNS dynamics is not fully understood.
- Understanding NNS modulation is crucial for infant development and feeding interventions.
Purpose of the Study:
- To investigate the impact of patterned auditory stimuli on infant NNS and cardiorespiratory patterning.
- To determine if variations in intraburst frequency of auditory stimuli affect NNS dynamics.
- To assess the relationship between auditory stimulation and physiological responses in infants.
Main Methods:
- Sixteen healthy full-term infants participated.
- NNS and cardiorespiratory patterns were measured using a custom pacifier and physiological sensors.
- Infants were exposed to auditory stimuli with varying interburst frequencies (1, 2, and 4 Hz).
Main Results:
- Significant differences were observed in NNS burst duration, cycles per burst, and bursts per minute across auditory stimulation conditions.
- Infants showed modifications in their NNS patterns in response to the auditory stimuli.
- No significant effects of auditory stimulation were found on cardiorespiratory outcomes.
Conclusions:
- Patterned auditory stimulation significantly alters infant NNS dynamics.
- Infants appear to modulate their suck patterns in response to acoustic stimuli.
- Auditory stimulation did not impact cardiorespiratory patterning in this study.
Aim:
To determine whether patterned auditory stimuli, designed to mimic the natural burst-pause pattern evident in non-nutritive suck (NNS) with variations to the intraburst frequency, alter infants' NNS and cardiorespiratory patterning.
Methods:
Sixteen healthy full-term infants participated in this study. Infants were fitted with electrocardiogram electrodes and a respiratory belt to measure cardiorespiratory patterning. Infants were offered a custom pacifier attached to a pressure transducer to measure NNS. Prior to the start of the study, a two-minute NNS and cardiorespiratory baseline was attained. Next, three auditory stimulation conditions were presented in the form of sucking clicks at interburst frequencies of 1, 2 and 4 Hz. Each of the three frequencies was played for two minutes.
Results:
Separate repeated-measures ANOVAs revealed significant differences in NNS burst duration (p = 0.013), NNS cycles/burst (p = 0.010) and NNS bursts/minute (p = 0.005) across auditory stimulation conditions. No significant differences were evident in the cardiorespiratory outcomes.
Conclusion:
We found that patterned auditory stimulation significantly reduced NNS dynamics and had no effect on cardiorespiratory patterning. The findings further suggest that infants attempted to modulate their suck pattern to the patterned acoustic stimuli by shortening their burst durations with fewer cycles per burst.
