Uncoordinated sucking patterns in preterm infants are associated with abnormal general movements

Are sucking patterns and early spontaneous movements related to later developmental functioning outcomes? A cohort study

Sucking patterns and early spontaneous movements have an important role in the determination of later developmental problems, but the relationship of the two together with long-term outcomes has not been investigated. The objectives of this study were to (i) examine the relationship between sucking patterns using the Neonatal Oral Motor Assessment Scale (NOMAS) and fidgety movements and other movement patterns using detailed General Movements Assessment (GMA), and (ii) investigate the relationship between these early assessment methods and developmental functioning outcomes at later ages. We analyzed the NOMAS from 34 weeks' postmenstrual age up to 10 weeks post-term and GMA between 9 and 20 weeks post-term age, and the Bayley Scales of Infant and Toddler Development-Third Edition (Bayley-III) was applied for the developmental functioning outcomes to 62 infants (61%, 62/102) between 12 and 42 months of age. Among 102 infants at-risk, 70 (69%) showed a normal sucking pattern, and 85 (83%) had fidgety movements. The median Motor Optimality Score-Revised (MOS-R), as determined by GMA, of all infants was 24. The NOMAS was related to the MOS-R and its subcategories (p < 0.05) in all infants at-risk. The NOMAS, MOS-R and its subcategories were also related to cognitive, language, and motor development at later ages according to Bayley-III (p < 0.05).   Conclusion: This longitudinal study showed that the quality of sucking patterns, fidgety movements, and MOS-R were related to later developmental functioning, indicating that abnormal sucking patterns, aberrant fidgety movements, and lower MOS-R might predict developmental disorders. What is Known: • Sucking patterns and early spontaneous movements in which central pattern generators play an important role are related. • Sucking patterns and early spontaneous movements might be used separately to predict developmental outcomes. What is New: • Sucking patterns and early spontaneous movements, when used together, were related to later developmental functioning, including cognitive, language, and motor development in at-risk infants. • Predictive value of sucking patterns was lower for each developmental functioning outcome than early spontaneous movements.

Feeding dysfunction in NICU patients with cramped synchronized movements

Patients admitted to the neonatal intensive care unit (NICU) have higher association for neurodevelopment deficits, specifically cerebral palsy (CP). We identified patients with risk for CP using abnormal Pretchl's General Movement Assessment (GMA) and sub-category of cramped synchronized movements (CSM) and reported their feeding outcomes at discharge. Over 75 % of these patients required either nasogastric (NGT) or gastrostomy tube (GT) at discharge. Of these, 57 % weaned off their NGT or GT at home and 43 % of patients still needed a GT one year after discharge. Of those that could not wean off their NGT or GT, these patients had longer hospital stay, took lower percentage by mouth, and an older post-menstrual age at discharge. We did not find a difference in NGT or GT use between patients with IVH, ELBW, nor between their birthweight or gestation age at birth. This study provides further clinical characteristics in NICU patients who have higher risk of CP, and supports the need for skilled feeding therapy and resources both during and after NICU admission.

Prefeeding interventions improve oral feeding in preterm infants

OBJECTIVE

To assess whether oral stimulation (OS), nonnutritive sucking (NNS) and combined tactile/kinesthetic (T/K) interventions can improve the effects of oral feeding in preterm infants.

METHODS

A retrospective review was performed from 2014 to 2016, in which one hundred thirty preterm infants were separated into two intervention groups (the OS + NNS group and the OS + NNS + T/K group) and one control group. Infants in the two intervention groups received 30 min of interventions a day. All interventions started 48 h after stopping nasal continuous positive airway pressure until participants reached complete oral feeding.

RESULTS

The transition times of the OS + NNS, OS + NNS + T/K, and control groups from the introduction of oral feeding to independent oral feeding were 9.03 ± 0.58, 7.20 ± 0.28, and 12.17 ± 0.64 days, respectively (P < 0.05). The infants' weights at full oral feeding in the OS + NNS, OS + NNS + T/K, and control groups were 1834.58 ± 47.96, 1999.17 ± 92.62, and 1725.87 ± 40.34 g, respectively (P = 0.007). Further post hoc analyses indicated that the weight gain at full oral feeding in the OS + NNS and OS + NNS + T/K groups were more significant than the control group (P = 0.012 and P = 0.036, respectively)Conclusion: OS + NNS and OS + NNS + T/K interventions could shorten the transition time from tube feeding to independent oral feeding; OS + NNS and OS + NNS + T/K interventions improved weight gain compared to the control group. Furthermore, the OS + NNS + T/K group was superior to the OS + NNS group regarding transition time and weight gain.

Transcutaneous auricular vagus nerve stimulation (taVNS) given for poor feeding in at-risk infants also improves their motor abilities

PURPOSE

Transcutaneous auricular vagus nerve stimulation (taVNS) is a non-invasive neuromodulation technique that may improve oromotor skills when paired with feeding in at-risk infants, but effects on other motor function and how motor function relates to white matter (WM) microstructure are unknown.

METHODS

In this prospective study, infants failing oral feeds and slated for gastrostomy tube (G-tube) placement received taVNS paired with bottle feeding daily for 2-3 weeks. The effects of taVNS-paired feeding on general and specific head movements were investigated using the Specific Test of Early infant motor Performance (STEP) and diffusion MRI obtained before and after taVNS treatment. Scores between and within groups (taVNS responders, attained full oral feeds; non-responders, received G-tubes) were compared.

RESULTS

Performance on head movement items improved significantly in responders but not in non-responders (p < 0.05). Total STEP scores were significantly higher in responders after taVNS treatment than non-responders (p = 0.04). One STEP item, rolling by arm, was associated with significantly greater change in WM tract microstructure (p < 0.05) in the responders.

CONCLUSION

These results suggest that pairing feeding with taVNS may affect specific head and neck movements to a greater extent in infants who are able to attain full oral feeds.

[Effectiveness of 2 interventions for independent oral feeding in pre-terms]

INTRODUCTION

Oral feeding of pre-term newborns (PTNB) is hampered by their immaturity and intercurrent diseases, which can prolong their hospital stay. The objective of this study was to assess the effectiveness of a program that combines tactile, kinesthetic and oral stimulation (T+K+OS) compared to another intervention based on exclusively oral stimulation (OS), in the time necessary to achieve independent feeding and hospital discharge.

PATIENTS AND METHODS

A clinical study of 2 randomized groups (OS vs. T+K+OS) was carried out on 42 PTNB with gestational age between 27-32 weeks and birth weight>900g. The stimulation programs were carried out in sessions of 15min, for 10 days.

RESULTS

The PTNBs in the T+K+OS group achieved independent oral feeding earlier, compared to the OS group (24.9±10.1 vs. 34.1±15.6 days, P=.02). An analysis of covariance was performed, which confirmed that the birth weight and gestational age covariates had significant effects on time to reach suction feeding (birth weight: F[1, 38]=5.79; P=.021; gestational age: F[1, 38]=14.12; P=.001) and that once its effect was controlled, the intervention continued to have a significant effect (F[1, 38]=6.07; P=.018). The T+K+OS group, compared to the OS group, achieved an earlier hospital discharge (39±15 vs. 45±18 days), although the differences were not significant (P=.21).

CONCLUSIONS

Combined therapies that include T+K+OS are more effective than OS alone, in order to achieve independent oral feeding in PTNBs.

Abnormal Nutritive Sucking as an Indicator of Neonatal Brain Injury

A term neonate is born with the ability to suck; this neuronal network is already formed and functional by 28 weeks gestational age and continues to evolve into adulthood. Because of the necessity of acquiring nutrition, the complexity of the neuronal network needed to suck, and neuroplasticity in infancy, the skill of sucking has the unique ability to give insight into areas of the brain that may be damaged either during or before birth. Interpretation of the behaviors during sucking shows promise in guiding therapies and how to potentially repair the damage early in life, when neuroplasticity is high. Sucking requires coordinated suck-swallow-breathe actions and is classified into two basic types, nutritive and non-nutritive. Each type of suck has particular characteristics that can be measured and used to learn about the infant's neuronal circuitry. Basic sucking and swallowing are present in embryos and further develop to incorporate breathing ex utero. Due to the rhythmic nature of the suck-swallow-breathe process, these motor functions are controlled by central pattern generators. The coordination of swallowing, breathing, and sucking is an enormously complex sensorimotor process. Because of this complexity, brain injury before birth can have an effect on these sucking patterns. Clinical assessments allow evaluators to score the oral-motor pattern, however, they remain ultimately subjective. Thus, clinicians are in need of objective measures to identify the specific area of deficit in the sucking pattern of each infant to tailor therapies to their specific needs. Therapeutic approaches involve pacifiers, cheek/chin support, tactile, oral kinesthetic, auditory, vestibular, and/or visual sensorimotor inputs. These therapies are performed to train the infant to suck appropriately using these subjective assessments along with the experience of the therapist (usually a speech therapist), but newer, more objective measures are coming along. Recent studies have correlated pathological sucking patterns with neuroimaging data to get a map of the affected brain regions to better inform therapies. The purpose of this review is to provide a broad scope synopsis of the research field of infant nutritive and non-nutritive feeding, their underlying neurophysiology, and relationship of abnormal activity with brain injury in preterm and term infants.

The Effect of Severe Intraventricular Hemorrhage on the Biorhythms of Feeding in Premature Infants

Background: Suck-swallow rhythmicity and the integration of breathing into infant feeding are developmentally regulated. Neurological injury and breathing abnormalities can both impact feeding in preterm infants. Objective: To determine the effects of neurologic injury independent of effects of disordered breathing on feeding biorhythms in premature infants. Methods: Low-risk preterm infants (LRP), infants with Grade 3-4 Intraventricular Hemorrhage (IVH), those with bronchopulmonary dysplasia (BPD), and those with both BPD and IVH (BPD+IVH) were identified. Forty-seven infants, 32-42 weeks Postmenstrual Age (PMA) were evaluated on one or more occasions (131 studies). Of these, 39 infants (81 studies) were performed at >35 weeks PMA. Coefficient of variation (COV) (=standard deviation of the inter-event (e.g., suck-suck, swallow-breath, etc.) interval divided by the mean of the interval) was used to quantify rhythmic stability. Results: To adjust for PMA, only those infants >35-42 weeks were compared. Suck-suck COV was significantly lower (more rhythmically stable) in the LRP group [COV = 0.274 ± 0.051 (S.D.)] compared to all other groups (BPD = 0.325 ± 0.066; IVH = 0.342 ± 0.072; BPD + IVH = 0.314 ± 0.069; all p < 0.05). Similarly, suck-swallow COV was significantly lower in LRP babies (0.360 ± 0.066) compared to the BPD group (0.475 ± 0.113) and the IVH cohort (0.428 ± 0.075) (p < 0.05). The BPD+IVH group (0.424 ± 0.109), while higher, was not quite statistically significant. Conclusions: Severe IVH negatively impacts suck-suck and suck-swallow rhythms. The independent effect of neurological injury in the form of IVH on feeding rhythms suggests that quantitative analysis of feeding may reflect and predict neurological sequelae.

Association of uncoordinated sucking pattern with developmental outcome in premature infants: a retrospective analysis

Background

Stress signals during sucking activity such as nasal flaring, head turning, and extraneous movements of the body have been attributed to incoordination of sucking, swallowing, and respiration (SSR) in premature infants. However, the association of uncoordinated sucking pattern with developmental outcomes has not yet been investigated. The aim of this study was to investigate whether uncoordinated sucking pattern during bottle-feeding in premature infants is associated with the developmental outcomes at 8–12 and 18–24 months of age (corrected for prematurity).

Methods

We retrospectively reviewed the medical records and video recordings for the Neonatal Oral-Motor Assessment Scale (NOMAS) of premature infants and divided them into two groups based on the presence or absence of incoordination. The Bayley-III cognition composite scores of the incoordination-positive and incoordination-negative group were compared at 8–12 and 18–24 months of age.

Results

Seventy premature infants exhibited a disorganized sucking pattern according to the NOMAS. The average Bayley-III cognition composite scores at 8–12 months of age were 92.5 ± 15.6 and 103.0 ± 11.3 for the incoordination-positive (n = 22) and incoordination-negative groups (n = 48), respectively (p = 0.002). The average Bayley-III cognition composite scores at 18–24 months were 90.0 ± 17.9 and 100.7 ± 11.5 for the incoordination-positive (n = 21) and incoordination-negative groups (n = 46), respectively (p = 0.005). A multiple linear regression analysis indicated that the presence of uncoordinated sucking pattern, grade 3 or 4 germinal matrix hemorrhage–intraventricular hemorrhage, and moderate to severe bronchopulmonary dysplasia were independently associated with cognitive development at 18–24 months of age.

Conclusions

Uncoordinated sucking pattern in premature infants was independently associated with a higher risk of abnormal developmental outcome in the cognitive domain of the Bayley-III at both 8–12 and 18–24 months. There may be a need for periodic follow-up and early intervention for developmental delay when incoordination of SSR that results in stress signals on the NOMAS is observed before 40 weeks postmenstrual age.

Psychometric Properties of the Early Feeding Skills Assessment Tool

BACKGROUND

Supporting infants as they develop feeding skills is an essential component of neonatal and pediatric care. Selecting appropriate and supportive interventions begins with a thorough assessment of the infant's skills. The Early Feeding Skills (EFS) tool is a clinician-reported instrument developed to assess the emergence of early feeding skills and identify domains in need of intervention.

PURPOSE

The purpose of this study was to identify the factor structure of the EFS and test its psychometric properties, including internal consistency reliability and construct validity.

METHODS

EFS-trained interprofessional clinicians in 3 settings scored 142 feeding observations of infants 33 to 50 weeks' postmenstrual age. Redundant and rarely endorsed items were removed. Factor analysis methods clustered items into subscales. Construct validity was examined through the association of the EFS with (1) concurrently scored Infant-Driven Feeding Scale-Quality (IDFS-Q), (2) infant birth risk (gestational age), and (3) maturity (postmenstrual age).

RESULTS

Principal components analysis with varimax rotation supported a 5-factor structure. The total EFS demonstrated good internal consistency reliability (Cronbach α= 0.81). The total EFS score had construct validity with the IDFS-Q (r =-0.73; P < .01), and with gestational age of a subsample of premature infants (r = 0.22; P < .05).

IMPLICATIONS FOR PRACTICE

As a valid and reliable tool, the EFS can assist the interprofessional feeding team to organize feeding assessment and plan care.

IMPLICATIONS FOR RESEARCH

The strong psychometric properties of the EFS support its use in future research.

Association Between Breastfeeding and Childhood Breathing Patterns: A Systematic Review and Meta-Analysis

OBJECTIVES

This systematic review aimed to evaluate the association between breastfeeding and breathing patterns in children.

MATERIALS AND METHODS

We searched PubMed, EMBASE, Web of Science, CINAHL, and the Cochrane Central Register of Controlled Trials for publications from inception to October 1, 2017. The breastfeeding duration and period of exclusive breastfeeding were selected as primary outcomes. The odds ratio (OR) and 95% confidence interval (CI) were calculated. A meta-analysis was conducted to synthesize the evidence. The Newcastle-Ottawa Score was used for quality and comparability assessment.

RESULTS

Of the 54 articles identified, three observational studies met the inclusion criteria for this meta-analysis, representing 1,046 participants. The results of the meta-analysis revealed that the prevalence rate of mouth breathing (OR = 2.04; 95% CI, 1.26-3.31; p = 0.004) was significantly higher in subjects who were breastfed for less than 6 months, but no significant difference was observed within the periods of exclusive breastfeeding (6 months or less) (OR = 1.27; 95% CI, 0.73-2.21; p = 0.40).

CONCLUSION

We found only limited evidence about the association between breastfeeding and breathing patterns. However, the current evidence supports the association between breastfeeding and childhood breathing patterns. Based on this review, we found that the frequency of normal nasal respiration increases with the duration of breastfeeding. The methodological quality of the studies included was moderate. Thus, future studies should aim to correct the confounding factors related to breathing patterns, to use standardized diagnostic criteria of mouth breathing, and to conduct a prospective research to reduce the recall bias.

Predictors and outcomes of the Neonatal Oral Motor Assessment Scale (NOMAS) performance: a systematic review

The NOMAS is by far the most used tool to screen early oral-motor skills in newborns. Here we provide an updated review of scientific literature on the use of the Neonatal Oral Motor Assessment Scale (NOMAS) to screen early oral-motor skills in newborns. An integrative review has been carried out consistent with PRISMA guidelines and standardized qualitative appraisal. Data abstracting and synthesis were executed by two independent co-authors who solved disagreement in conference. Twenty records have been included and reviewed. The efficacy of the NOMAS in screening and identifying precocious oral-motor skills received inconsistent support. Moderate validity and low reliability emerged. Moreover, despite the NOMAS' adequately screen efficient and inefficient feeders, limited evidence emerged for predictive value of NOMAS score on feeding and psychomotor developmental trajectories during the first 2 years of age.

CONCLUSION

The present review highlights benefits and limitations of the NOMAS. Future research is needed to develop observational and clinically-relevant tools to better identify newborns which are at lower- and higher-risk of developing less-than-optimal feeding behaviors and to guide with greater precision the diagnostic and therapeutic journey of these newborns. What is Known: • The assessment of oral-motor skills in newborns and infants is critical for early intervention • The NOMAS is the most adopted tool to assess oral-motor skills in newborns and infants What is New: • The ability of the NOMAS to target newborn at risk for feeding disorders is confirmed • Nonetheless, the capacity to predict long-term developmental outcomes is limited.

Swallow-Breath Interaction and Phase of Respiration with Swallow during Non-Nutritive Suck in Infants Affected by Neonatal Abstinence Syndrome

BACKGROUND

The development of suck-swallow-breath rhythms during non-nutritive suck (NNS) may be an indicator of neurologic integrity. We have described swallow-breath (SwBr) interaction and phase of respiration (POR) with swallow during NNS in low-risk preterm (LRP) infants. NNS in infants with neonatal abstinence syndrome (NAS) has not been described with our method.

METHOD

Suckle, swallow, thoracic motion, and nasal airflow were measured during NNS in 10 infants with NAS and 12 unaffected infants (control). Logistic regression models were fit to describe the three types of SwBr and five types of POR in terms of the independent variables (gender, gestational age, birth weight, postmenstrual age, weeks postfirst nipple feed and swallows per study). We also compared the NAS group to 16 LRP infants.

RESULTS

In the NAS group, there were 94 swallows in 18 studies. In the control group, there were 94 swallows in 12 studies. There were statistical differences between groups for all three types of SwBr. The distribution of SwBr in NAS was similar to LRP infants with NAS having fewer swallows with attenuated respiration and more with central apnea. For POR, there were few differences. Over time, the distribution of SwBr in NAS infants approaches that of control infants.

DISCUSSION

Variability in SwBr and POR during NNS may represent neurologic dysfunction in infants with NAS. Specifically, term infants with NAS display an immature pattern of SwBr making them more similar to preterm infants, rather than a unique pathology. The distribution of SwBr and POR in NAS infants becomes more like term infants, possibly representing catch-up development as the NAS symptoms resolve.

CONCLUSION

SwBr in babies with NAS is different from that of unaffected term infants, actually being similar to preterm infants. Infants with NAS exhibit a dysmature pattern of NNS development which resolves over time.

Neuropredictors of oromotor feeding impairment in 12month-old children

BACKGROUND

Feeding impairment is prevalent in children with neurodevelopmental issues. Neuroimaging and neurobehavioral outcomes at term are predictive of later neuromotor impairment, but it is unknown whether they predict feeding impairment.

AIMS

To determine whether neurobehavior and brain magnetic resonance imaging (MRI) at term predict oromotor feeding at 12 months in preterm and term-born children.

STUDY DESIGN

Prospective cohort study.

SUBJECTS

248 infants (97 born <30 weeks and 151 born at term) recruited at birth.

OUTCOME MEASURES

Neurobehavioral assessments (General Movements (GMA), Hammersmith Neonatal Neurological Examination (HNNE), Neonatal Intensive Care Unit Network Neurobehavioral Scale (NNNS)); and brain MRI were administered at term-equivalent age. Oromotor feeding was assessed at 12 months corrected age using the Schedule for Oral Motor Assessment.

RESULTS

49/227 children had oromotor feeding impairment. Neurobehavior associated with later feeding impairment was: suboptimal NNNS stress (odds ratio [OR] 2.68; 95% confidence interval [CI] 1.20–6.01), non-optimal reflexes (OR 3.33; 95% CI 1.37–8.11) and arousal scales (OR 2.54; 95% CI 1.03–6.27); suboptimal HNNE total (OR 4.69; 95% CI 2.20–10.00), reflexes (OR 2.62; 95% CI 1.06–6.49), and tone scores (OR 3.87; 95% CI 1.45–10.35); and abnormal GMA (OR 2.60; 95% CI 1.21–5.57). Smaller biparietal diameter also predicted feeding impairment (OR 0.88; 95% CI 0.79–0.97). There was little evidence that relationships differed between birth groups.

CONCLUSIONS

Neurobehavior and biparietal diameter at term are associated with oromotor feeding at 12 months. These results may identify children at greatest risk of oromotor feeding impairment.

Sucking behaviour in infants born preterm and developmental outcomes at primary school age

AIM

To determine the association between sucking in infants born preterm and developmental outcomes at 5 years.

METHOD

Thirty-four infants were included (mean gestational age 30wks 4d, mean birthweight 1407g). The Neonatal Oral-Motor Assessment Scale was used longitudinally from 37 to 50 weeks postmenstrual age. At 5 years, we assessed motor skills, intelligence, language, verbal memory, and behavioural problems. Linear regression analyses were performed to test whether aspects of sucking behaviour predicted these developmental outcomes. Where linear regression was not appropriate, Spearman's correlation coefficients were calculated between sucking and developmental outcomes.

RESULTS

Sucking was associated with total motor skills (B [unstandardized correlation coefficient for normally distributed data]=22.66, 95% confidence interval [CI] 6.61 to 38.71), balance (Spearman's ρ=0.64, p<0.001), total intelligence (B=-1.16, 95% CI -1.89 to -0.44, B=10.48, 95% CI 0.39 to 20.71, B=-2.22, 95% CI -3.42 to -1.02), verbal intelligence (B=-0.95; 95% CI -1.83 to -0.07, B=-2.02; 95% CI -3.55 to -0.49), performance intelligence (B=-1.34, 95% CI -2.13 to -0.54, B=12.36, 95% CI 1.13 to 23.60, B=-2.37, 95% CI -3.75 to -0.96), and language (B=-1.78, 95% CI -3.36 to -0.19). All associations were in the same direction: the better the sucking, the higher the test scores. Verbal memory and behavioural problems were not associated with sucking.

INTERPRETATION

Abnormal sucking between 42 weeks and 50 weeks postmenstrual age may reflect abnormal neurological functioning in children born preterm.

Quantifying Neonatal Sucking Performance: Promise of New Methods

Neonatal feeding has been traditionally understudied so guidelines and evidence-based support for common feeding practices are limited. A major contributing factor to the paucity of evidence-based practice in this area has been the lack of simple-to-use, low-cost tools for monitoring sucking performance. We describe new methods for quantifying neonatal sucking performance that hold significant clinical and research promise. We present early results from an ongoing study investigating neonatal sucking as a marker of risk for adverse neurodevelopmental outcomes. We include quantitative measures of sucking performance to better understand how movement variability evolves during skill acquisition. Results showed the coefficient of variation of suck duration was significantly different between preterm neonates at high risk for developmental concerns (HRPT) and preterm neonates at low risk for developmental concerns (LRPT). For HRPT, results indicated the coefficient of variation of suck smoothness increased from initial feeding to discharge and remained significantly greater than healthy full-term newborns (FT) at discharge. There was no significant difference in our measures between FT and LRPT at discharge. Our findings highlight the need to include neonatal sucking assessment as part of routine clinical care in order to capture the relative risk of adverse neurodevelopmental outcomes at discharge.

New scoring system improves inter-rater reliability of the Neonatal Oral-Motor Assessment Scale

AIM

The Neonatal Oral-Motor Assessment Scale (NOMAS) is a standardised tool to assess sucking patterns in infants to 48 weeks of postmenstrual age (PMA). In the Netherlands, the interpretation of specific NOMAS items has evolved, leading to a new scoring system. Recent research using the NOMAS describes a way of clustering the most frequent items, and the aim of this study was to determine whether those changes improved the inter-rater reliability.

METHODS

The inter-rater reliability was tested by two NOMAS-certified therapists who scored 120 video recordings of 40 preterm infants, admitted to the University Hospital of Düsseldorf, Germany, at 34, 37 and 44 weeks PMA, for normal, disorganised and dysfunctional diagnosis. The NOMAS comprised 28 items and five clusters of items.

RESULTS

The therapists agreed on the level of diagnoses for 116 of 120 recordings (Cohen's Κ 0.90), on an item level for 107 of 120 recordings (Cohen's Κ 0.78) and on a cluster level for 108 of 120 recordings (Cohen's K 0.90).

CONCLUSION

The new scoring system improved the inter-rater reliability of the NOMAS on all levels, highlighting the importance of NOMAS user having a clear understanding on how to interpret and score each item.

Fidgety movements - tiny in appearance, but huge in impact

OBJECTIVES

To describe fidgety movements (FMs), i.e., the spontaneous movement pattern that typically occurs at 3-5 months after term age, and discuss its clinical relevance.

SOURCES

A comprehensive literature search was performed using the following databases: MEDLINE/PubMed, CINAHL, The Cochrane Library, Science Direct, PsycINFO, and EMBASE. The search strategy included the MeSH terms and search strings ('fidgety movement*') OR [('general movement*') AND ('three month*') OR ('3 month*')], as well as studies published on the General Movements Trust website (www.general-movements-trust.info).

SUMMARY OF THE DATA

Virtually all infants develop normally if FMs are present and normal, even if their brain ultrasound findings and/or clinical histories indicate a disposition to later neurological deficits. Conversely, almost all infants who never develop FMs have a high risk for neurological deficits such as cerebral palsy, and for genetic disorders with a late onset. If FMs are normal but concurrent postural patterns are not age-adequate or the overall movement character is monotonous, cognitive and/or language skills at school age will be suboptimal. Abnormal FMs are unspecific and have a low predictive power, but occur exceedingly in infants later diagnosed with autism.

CONCLUSIONS

Abnormal, absent, or sporadic FMs indicate an increased risk for later neurological dysfunction, whereas normal FMs are highly predictive of normal development, especially if they co-occur with other smooth and fluent movements. Early recognition of neurological signs facilitates early intervention. It is important to re-assure parents of infants with clinical risk factors that the neurological outcome will be adequate if FMs develop normally.

Goniometer Measurements of Oral Labial Angle and Evaluation of Oral Motor Reflexes in Preterm Infants: Comparison to Findings in Term Infants

To date, no study has evaluated changes in oral labial angle as preterm infants mature. The main purpose of this study was to document goniometer measurements of the labial angle of the mouth in preterm infants, to assess changes with development, to compare to findings in healthy term infants, and also evaluate oral motor reflexes in these groups. Seventy-eight preterm infants and 45 healthy term infants were recruited for the prospective study. Labial angle was assessed via goniometer, and oral motor reflexes and the volume of milk ingested were evaluated. There was significant difference between term and preterm infants' labial angles (P < .01). The distribution of preterm infants' angles were similar to term infants' by 36 to 40 weeks' postmenstrual age. Goniometer measurements of the oral labial angle may reveal oral motor performance in preterm infants and may be relevant for feeding skills assessment in this group of infants.

The association between sucking behavior in preterm infants and neurodevelopmental outcomes at 2 years of age

OBJECTIVE

To evaluate whether a specific period after birth (in weeks postmenstrual age [PMA]) and specific elements of sucking are associated with abnormal neurodevelopmental outcomes at age 2 years using a longitudinal approach.

STUDY DESIGN

Fifty-two preterm infants participated in this longitudinal cohort study (mean gestational age, 29.5 weeks; mean birth weight, 1197 g). We assessed the infants' sucking patterns at 37-50 weeks PMA using the Neonatal Oral-Motor Assessment Scale. At age 2 years, based on a neurologic examination and the Dutch version of the Bayley Scales of Infant and Toddler Development, Second Edition, we categorized the children as developing normally (n = 39) or abnormally (n = 13). ORs, including 95% CIs, were calculated to ascertain the risk of abnormal neurodevelopmental outcomes.

RESULTS

The inability to sustain sucking at 46 weeks PMA (OR, 6.25; 95% CI, 1.29-30.35) and the absence of a mature sucking pattern at 44 weeks PMA (OR, 6.30; 95% CI, 1.40-28.32) significantly increased the odds of abnormal neurodevelopmental outcomes at age 2 years. The ORs of the Neonatal Oral-Motor Assessment Scale items assessing rhythmic jaw movements, rhythmic tongue movements, and coordination among sucking, swallowing, and respiration were high shortly after term, but failed to reach significance.

CONCLUSION

Specific elements of sucking at 4-6 weeks postterm are associated with abnormal neurodevelopmental outcomes in preterm infants at age 2 years. This period might be a sensitive time of infant development in which sucking behavior is an early marker of abnormal developmental outcomes. This finding may offer opportunities for early intervention.

Antenatal and Postnatal Assessment of Neurobehavior: Which One should be used?

It is obvious that this environment is quite different from one man is experiencing after birth, but, although different, intrauterine environment is ideal at that stage of human development. There is a question of the environmental discontinuity between intrauterine conditions characterized by existence of microgravity (baby astronaut hypothesis), and extrauterine life with gravity as developmental condition sine qua non. The human brain is one of the organs which is very sensitive to environmental changes affecting its growth and development. The brain of very tiny prematurely born babies is unable to follow the genetically determined growth pattern in extrauterine environment, even when postnatal nutrition and nurturing of the babies according to our best knowledge are appropriate. Is this fact of any significance to make distinction between normal and abnormal neurodevelopment pre- and postnatally is still unclear?

Kurjak antenatal neurodevelopmental test (KANET) using four-dimensional ultrasound (4D US) has been introduced using ten parameters and after attempt of standardization only eight parameters remained for neurodevelopmental assessment of low- and high-risk fetuses. We believe that at present level of knowledge, KANET test could be considered as a good test for the detection of fetuses with high neurological risk, without the possibility to define reliable long-term neurodevelopmental outcome. This is also hardly possible based on postnatal neurological assessment with 27 different postnatal tests. They were primarily neurobehavioral or neuromotor assessments that were suitable for use with preterm infants, and were discriminative, predictive or evaluative.

There was a high willingness of clinician to find postnatal neurodevelopmental test which could be predictive for short- term and long-term outcome of low and high-risk infants.

Although, there are many tests available for prenatal and postnatal assessment of neurodevelopment, none of them is reliable in the prediction of neurodevelopmental outcome in low-risk population, while many could be used with fairly acceptable predictivity in high-risk population. Although, many studies have been conducted in order to solve this problem, still there is a space for improvement. In postnatal period we are dealing with infant in front of the clinician with direct observation, while pretnatally we are dealing with quite different environment and less mature brain.

How to cite this article

Stanojevic M. Antenatal and Postnatal Assessment of Neurobehavior: Which One should be used? Donald School J Ultrasound Obstet Gynecol 2015;9(1):67-74.

Association between breastfeeding and breathing pattern in children: a sectional study

OBJECTIVE

to determine the prevalence of mouth breathing and to associate the history of breastfeeding with breathing patterns in children.

METHODS

this was an observational study with 252 children of both genders, aged 30 to 48 months, who participated in a dental care program for mothers and newborns. As an instrument of data collection, a semi-structured questionnaire was administered to the children's mothers assessing the form and duration of breastfeeding and the oral habits of non-nutritive sucking. To determine the breathing patterns that the children had developed, medical history and clinical examination were used. Statistical analysis was conducted to examine the effects of exposure on the primary outcome (mouth breathing), and the prevalence ratio was calculated with a 95% confidence interval.

RESULTS

of the total sample, 43.1% of the children were mouth breathers, 48.4% had been breastfed exclusively until six months of age or more, and 27.4% had non-nutritive sucking habits. Statistically significant associations were found for bottle-feeding (p<0.001) and oral habits of non-nutritive sucking (p=0.009), with an increased likelihood of children exhibiting a predominantly oral breathing pattern. A statistically significant association was also observed between a longer duration of exclusive breastfeeding and a nasal breathing pattern presented by children.

CONCLUSION

an increased duration of exclusive breastfeeding lowers the chances of children exhibiting a predominantly oral breathing pattern.

Technological solutions and main indices for the assessment of newborns' nutritive sucking: a review

Nutritive Sucking (NS) is a highly organized process that is essential for infants' feeding during the first six months of their life. It requires the complex coordination of sucking, swallowing and breathing. The infant's inability to perform a safe and successful oral feeding can be an early detector of immaturity of the Central Nervous System (CNS). Even though the importance of early sucking measures has been confirmed over the years, the need for standardized instrumental assessment tools still exists. Clinicians would benefit from specifically designed devices to assess oral feeding ability in their routine clinical monitoring and decision-making process. This work is a review of the main instrumental solutions developed to assess an infant's NS behavior, with a detailed survey of the main quantities and indices measured and/or estimated to characterize sucking behavior skills and their development. The adopted sensing measuring systems will be described, and their main advantages and weaknesses will be discussed, taking into account their application to clinical practice, or to at-home monitoring as post-discharge assessment tools. Finally, the study will highlight the most suitable sensing solutions and give some prompts for further research.

Design, development and experimental validation of a non-invasive device for recording respiratory events during bottle feeding

In newborns, a poor coordination between sucking, swallowing and breathing may undermine the effectiveness of oral feeding and signal immaturity of Central Nervous System. The aim of this work is to develop and validate a non-invasive device for recording respiratory events of newborns during bottle feeding. The proposed device working principle is based on the convective heat exchanged between two hot bodies and the infants' breathing. The sensing elements are inserted into a duct and the gas exchanged by infants is conveyed into this duct thanks to an ad hoc designed system to be mounted on a commercial feeding bottle. Two sets of experiments have been carried out in order to investigate the discrimination threshold of the device and characterize the sensor response at oscillating flows. The effect of distance and tilt between nostrils and device, and the breathing frequency, have been investigated simulating nostrils and neonatal respiratory pattern. The device has a discrimination threshold lower than 0.5 L/min at both 10° and 20° of tilt. Distance for these two settings does not affect the threshold in the investigated range (10-20 mm). Moreover, the device is able to detect breathing events, and to discriminate the onset of expiratory phase, during a neonatal respiratory task delivered by a lung simulator. The results foster the successful application of this device to the assessment of the temporal breathing pattern of newborns during bottle feeding with a non-invasive approach.