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PubMed2004

Influence of sleep position experience on ability of prone-sleeping infants to escape from asphyxiating microenvironments by changing head position.

OBJECTIVE: Several studies have found that back- or side-sleeping infants who are inexperienced in prone sleeping are at much higher risk for sudden infant death syndrome (SIDS) when they turn to prone or are placed prone for sleep compared with infants who normally sleep prone. Moreover, such inexperienced infants are more likely to be found in the face-down position at death after being placed prone compared with SIDS infants who are experienced in prone sleeping. We hypothesized that lack of experience in prone sleeping is associated with increased difficulty in changing head position to avoid an asphyxiating sleep environment. METHODS: We studied 38 healthy infants while they slept prone. Half of these were experienced and half were inexperienced in prone sleeping. To create a mildly asphyxiating microenvironment, we placed infants to sleep prone with their faces covered by soft bedding. We recorded inspired CO2 (CO2I), electrocardiogram, and respiration, and we videotaped head movements. Also, we assessed gross motor development (Denver Development Scale). RESULTS: When sleeping prone, with their faces covered by bedding, all infants experienced mild asphyxia as a result of rebreathing. All aroused and attempted escape from this environment. Infants used 3 stereotyped head-repositioning strategies. The least effective was nuzzling into the bedding with occasional brief head lifts. More effective were head lifts combined with a head turn. Some infants, however, could turn only to 1 side, right or left. Infants who were inexperienced in prone sleeping had less effective protective behaviors than experienced infants. Infant age did not correlate with efficacy of protective behaviors. Infants who were experienced in prone sleep had advanced gross motor development compared with inexperienced infants. CONCLUSION: Infants who are inexperienced in prone sleeping have decreased ability to escape from asphyxiating sleep environments when placed prone. These observations potentially explain the increased risk associated with prone sleep in infants who are inexperienced. The increased occurrence of the face-down position in such infants is also potentially explained. These findings suggest that airway protective behaviors may be acquired through the mechanism of operant conditioning (learning).

Aging↗
PubMed2006

Are infant-toddler social-emotional and behavioral problems transient?

OBJECTIVE: To examine the persistence of parent-reported social-emotional and behavioral problems in infants and toddlers. METHOD: The sample comprised 1,082 children ascertained from birth records. Children were 12 to 40 months old in year 1 (1998-1999) and 23 to 48 months old in year 2 (1999-2000). Eighty percent participated in year 1 and 91% were retained in year 2. Social-emotional and behavioral problems were measured by high scores (> or=90th percentile) on the Internalizing, Externalizing, and/or Dysregulation domains of the Infant-Toddler Social and Emotional Assessment (ITSEA). Parents reported on sociodemographic factors, family life impairment, parenting stress, and family functioning. RESULTS: Among children with any high ITSEA domain score in year 1, 49.9% had persistent psychopathology, as indicated by the continued presence of a high score in year 2. In multivariate analyses, persistence was significantly more likely when parents reported co-occurring problems (i.e., problems in multiple ITSEA domains), high family life disruption, and high parenting distress in year 1. Homotypic persistence rates (i.e., same domain persistence) ranged from 38% to 50%. Only for dysregulation was homotypic persistence greater when co-occurring problems were present than for dysregulation alone. Persistence patterns were similar for boys and girls. CONCLUSION: Findings indicate that infant-toddler social-emotional/behavioral problems are not transient and highlight the need for early identification, multidomain and family assessment, and effective early intervention.

Affective Symptoms↗
PubMed2000

Behavioral methods used in the study of long-chain polyunsaturated fatty acid nutrition in primate infants.

Domains of behavior may be broadly categorized as sensory, motor, motivational and arousal, cognitive, and social. Differences in these domains occur because of changes in brain structure and function. Docosahexaenoic acid (DHA; 22:6-23) and arachidonic acid (AA; 20:4-26) are major structural components of the brain that decrease when diets deficient in the essential fatty acids (EFA) alpha-linolenic acid and linoleic acid are consumed. Early electrophysiologic and behavioral studies in EFA-deficient rodents showed behavioral effects attributable to lower-than-normal accumulation of DHA and AA in the brain. More recently, electrophysiologic and behavioral studies in EFA-deficient primate infants and analogous studies in human infants have been conducted. The human infants were fed formulas that could result in lower-than-optimal accumulation of long-chain polyunsaturated fatty acids (LCPUFAs) in the brain during critical periods of development. This article describes the behavioral methods that have been used to study primate infants. These methods may be unfamiliar to many physicians and nutritionists who wish to read and interpret the human studies. The behavioral outcomes that have been evaluated in LCPUFA studies represent only a fraction of those available in the behavioral sciences. Specific developmental domains have been studied less often than global development, even though studies of nonhuman primates deficient in EFAs suggest that the former provide more information that could help target the underlying mechanisms of action of LCPUFAs in the brain.

Animal Nutritional Physiological Phenomena↗
PubMed2001

Beyond ba-ba and gu-gu: challenges and strategies in coding infant vocalizations.

Infant vocal behaviors are extremely complex. Consequently, coding these behaviors is difficult and is typically associated with low reliability across observers. Various difficulties that arise when dealing with prelinguistic vocalizations, especially in the first 6 months of life, are outlined here. A proposed database of digitized infant vocalizations that illustrates strategies used to deal with these difficulties is then described. These strategies are based on theoretical infraphonological constructs, empirical observations, and information about the nature of mature phonological systems. Furthermore, the strategies are open-ended and can be modified as new information becomes available regarding infant vocal behaviors. At present, a preliminary database is available on the Web that illustrates some of these strategies. As the database is expanded, it is expected to provide a general framework for observers to categorize infant vocalizations and thereby enhance observer reliability.

Acoustics↗
PubMed2003

Sucrose attenuates a negative electroencephalographic response to an aversive stimulus for newborns.

Reports that sweet taste calms crying in newborns and is analgesic against the pain caused by a heel lance served as the basis for this study. Electroencephalographic (EEG) activity, heart rate activity, and infants' facial behaviors were recorded before and after a noninvasive, but noxious, heelstroke (procedure from the Brazelton Neonatal Behavior Assessment Scale). In a randomized and controlled trial, 34 newborns were administered 2 mL of water or sucrose solution before the heelstroke. Frontal EEG asymmetry scores were computed, and power in the 3 to 6 Hz frequency band was analyzed. Infants who received water showed increased relative right frontal EEG activation from baseline to the post-heelstroke phase, a pattern that typifies negative affect. The EEG of infants in the sucrose group did not change. Heart rate increased rapidly in both groups during the heelstroke phase. However, after the heelstroke, the heart rate of infants who received sucrose returned to baseline, whereas the heart rate of infants who tasted water remained elevated. During the heelstroke, the infants in the water group cried and grimaced twice as long as the infants in the sucrose group. These findings add to the growing literature showing that sucrose attenuates newborns' negative response to aversive or noxious stimuli.

Electroencephalography↗
PubMed1979

Matching behavior in the young infant.

Infants as young as 2--6 weeks have been reported to exhibit matching behavior in response to seeing an adult model tongue protrusion and certain other acts. Matching behavior to the tongue model declines by 12 weeks. The present study was designed to investigate whether (1) this matching behavior represents selective imitation or a released response that can be elicited by a broad but delimited class of incentive stimuli and (2) stimulation of tongue protrusion enhances the response and delays its decline. 24 infants were observed at 6, 10, and 14 weeks. A moving pen and ball were as effective as the tongue model in eliciting tongue protrusion at 6 weeks, while a dangling ring elicited as much hand opening and closing as the hand model at 14 weeks. After the 6-week visit, 12 of the infants were exposed to the tongue model daily. This intervention delayed the decline of matching behavior to the tongue model at 14 weeks. Also, experimental infants responded selectively to the tongue model, while the pen continued to be an effective releaser of tongue protrusions among controls.

Arousal↗
PubMed1993

Maternal views of preterm infants' responsiveness to social interaction.

Mothers of 47 very low birth weight ( < 1,500 gram) infants were interviewed concerning their feelings and views about interactions with them. Interviews were conducted within the first ten days and again three to five weeks after birth. Over the first month of the baby's hospitalization, mothers significantly increased their pleasure in interacting, knowledge of infant cues, and perception that their infants were responding. The most frequently mentioned behaviors were maternal talking and touching and infant eye opening and body activity. Many mothers appeared to be utilizing their infants' behaviors as a guide for their own behaviors and reported that their infants' behaviors had specific meanings. However, an equal number of mothers were not ascribing meaning to their infants' behaviors and did not appear to be using behavioral cues. These findings have implications for interventions by neonatal nurses.

Adult↗
PubMed1988

[The effect of hyperbilirubinemia and phototherapy on the behavior organization of newborn infants].

Hyperbilirubinemia is the most common problem experienced by neonates and has to be treated with phototherapy. The effects of hyperbilirubinemia and/or phototherapy on the behavior of neonates is investigated in this study by means of Brazelton Neonatal Behavior Assessment Scale. 21 jaundiced infants who received phototherapy (serum bilirubin above 25 mumol/l) are compared with 36 mildly jaundiced infants (150-250 mumol/l) and 35 control infants without any clinical sign of hyperbilirubinemia. The results shows the impact of hyperbilirubinemia on motor performance and the additional impact of phototherapy on autonomic regulation of neonates. The jaundiced infants shows some compensatory effects in their impaired behavior within the first two weeks.

Child Behavior Disorders↗
PubMed2003

Breast-feeding and sugar intake in babies with cleft lip and palate.

OBJECTIVE: To investigate the pattern of breast-feeding and sugar intake among babies with cleft lip and palate. PARTICIPANTS: Caretakers of 200 babies with cleft lip and palate enrolled at the Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, Brazil. RESULTS: A low prevalence of breast-feeding was found. The most reported reason was the sucking inability of the baby. Complete cleft lip and palate was the primary cause affecting sucking. The first contact with sugar occurred mainly through the baby bottle with milk during the first month of life. For nutritional supplement, the children were given sugar and fruit juices in the bottle. CONCLUSIONS: It was observed that dietary habits in babies with cleft lip and palate are more risky. This highlights the role played by early education and constant oral hygiene follow-up for prevention in these patients.

Animals↗
PubMed1999

[Transgenerational promotion of binding: correlation between mental binding models of mothers, binding patterns of their infants and perception and behavior of mothers in transition to parenthood].

The Adult Attachment Interview (AAI; George et al. 1996) was conducted with 28 mothers in order to assess their mental representations of attachment 4 years after giving birth to their first child. The interviews were coded and classified according to the method of Main and Goldwyn (1994). Using longitudinal data from the "Heidelberg Study on Transition to Parenthood", a significant correspondence was found between mothers' attachment representations and their childrens' patterns of attachment in the Ainsworth Strange Situation procedure after the first year of life. Additionally, further connections emerged between the mothers' attachment representation, their pre and post natal conceptions of their first child, their early bonding behavior, and their sensitive behavior with their 5-month-old infant in family interactions at home. These findings support the assumption of a transgenerational transmission of attachment quality and moreover indicate the usefulness of the Adult Attachment Interview in German-speaking countries, especially for studies on the transition to parenthood.

Adult↗
PubMed1992

Electroencephalographic and behavioral-state studies in infants of cocaine-addicted mothers.

OBJECTIVE: To evaluate cerebral cortical function with electroencephalography in infants of cocaine-addicted mothers. DESIGN: Patient series. SETTING: The Children's Hospital of Philadelphia (Pa). PARTICIPANTS: Thirty-five consecutive infants of cocaine-addicted mothers hospitalized for a comprehensive health assessment and 51 healthy, age-matched infants studied with electroencephalography and respiratory thermistor because they were siblings of sudden infant death victims (comparison group). INTERVENTIONS: None. MEASUREMENTS/MAIN RESULTS: Behavioral states during spontaneous daytime sleep were classified as active sleep or quiet sleep; quiet sleep was further characterized as immature, tracé alternant sleep or mature, continuous, slow wave sleep. No episodes of ictal apnea or nonictal apnea were recorded in infants of cocaine-addicted mothers; nonictal apnea was observed in one control patient. No electrographic seizures were recorded. There were no significant differences between the proportions of infants exposed to cocaine in utero and that of controls who displayed excessive sharp electroencephalographic transients, background abnormalities, immaturity, and hypermaturity. Electroclinical sleep discordance was present in 5.7% of infants of cocaine-addicted mothers vs 0% of controls. Cocaine-exposed infants displayed mature, continuous, slow wave sleep below 45 weeks of conceptional age in a significantly higher percentage than those in the comparison group. CONCLUSIONS: Although frank electroencephalographic abnormalities were infrequent in infants whose mothers were addicted to cocaine, they differed significantly in their younger age of onset of continuous, slow wave sleep. Our findings provide continued reason for concern that infants of cocaine-addicted mothers may suffer subtle adverse neurologic, cognitive, or behavioral effects later in life. The longitudinal assessment of sleep disturbance and its relation to later development might permit tracking of the long-term effects of prenatal exposure to cocaine.

Child↗
PubMed2001

A longitudinal investigation of infant auditory sensitivity.

The behavioral evaluation of hearing in very young infants has been fraught with procedural and interpretive problems. Despite the introduction of current physiological techniques of estimating hearing sensitivity, such as otoacoustic emissions and auditory brainstem-evoked responses, behavioral hearing assessment of young infants remains of interest to researchers of infant behavior and to clinicians who need to use a battery of tests in their assessment of infant hearing. The objective of this study was to provide the first longitudinal investigation of infant auditory sensitivity, using a new procedure for behavioral testing of neonates and infants. Behavioral responses to speech noise stimuli were obtained monthly from birth to 12 months of age. During each trial, the signal increased from an inaudible level in 2-dB steps until the infant responded. Therefore, a threshold estimate was obtained on each trial, and the average threshold could be computed across trials within a test session. Threshold estimates were in good agreement with previously reported infant behavioral thresholds based on cross-sectional designs. The age-related changes in threshold were fit with exponential functions for individual infants and for the group data. There was good agreement in the shape of these functions across infants, with asymptotic threshold level approached around 6 months of age. Therefore, this longitudinal study confirms that the age trend previously reported from cross-sectional findings is also observed in the development of individual infants.

Auditory Threshold↗
PubMed1994

Prenatal exposure to cigarettes in infants with obstructive sleep apneas.

OBJECTIVE: To investigate the effect of prenatal smoking on infant respiratory behavior during sleep. METHODS: A questionnaire concerning family habits and infants' history was completed for 550 healthy infants before a 9-hour night polysomnographic study. Because the data for 41 infants were not available for analysis, 509 subjects were studied: 115 were newborns evaluated within 1 week after birth, and 394 were healthy infants admitted at 11 weeks of life (range 5 to 29 weeks) after various research protocols. RESULTS: According to the smoking frequency of the mothers during pregnancy, the subjects were defined as "nonsmokers" (no cigarette smoked during pregnancy; n = 400), "light smokers" (1 to 9 cigarettes per day; n = 37), or "smokers" (10 or more cigarettes per day; n = 72). Compared with nonsmokers and light smokers, "smoking" mothers had a significant increase in the number of episodes of uterine bleeding during the pregnancy. Their infants had lower birth weights and more frequent episodes of profuse sweating during sleep. Infants of smokers also had more frequent and longer obstructive sleep apneas than those of the two other groups. For infants of smokers the relative risk for obstructive apneas was 2.76 (95% confidence interval: 1.63 to 4.69; P = .001). The relation between prenatal smoking and postnatal manifestation of obstructive sleep apneas demonstrated a dose-response pattern. Paternal smoking during pregnancy increased the risk of obstructive apneas only in the infants of smoking mothers, but not in those of the two other groups. Maternal smoking after birth did not add significantly to the risk of obstructive apneas. The effect of smoking was seen in older infants, as well as in the newborn not yet exposed to ambient cigarette smoke. A stepwise logistic regression, using obstructive sleep apneas as the dependent variable identified three significant independent variables: smoking during pregnancy (P = .001), profuse sweating during sleep (P = .001), and birth weight (P = .010). No explanation was found for the effect of prenatal smoking on obstructive sleep apneas. CONCLUSION: Prenatal smoking by mothers correlated with an increase in frequency and length of obstructive apneas and a decrease in birth weight of their infants. The infants were under greater risk for obstructive apnea if both parents smoked. Explanations for our results are unknown to us, but these findings may be of interest in the study of infant breathing behavior and epidemiological characteristics of sudden infant death syndrome.

Adolescent↗
PubMed1996

Perinatal stimulation and adaptation of the neonate.

The present report describes psychobiological studies of behavior around the time of birth. An adaptive, ecological perspective is presented in which stimulation of the fetus and newborn is purported to instigate adaptive postpartum behavior. Studies describing the perinatal sensory environment are reviewed, with a consideration of emergent sensory function of the fetus. It is asserted that afferent input associated with parturition perturbs the fetus and neonate, producing a general arousal state that facilitates breathing, suckling, and early learning. The view developed herein is that perinatal sensory input induces and canalizes the newborn's behavior, thereby regulating adaptive postpartum function. Deviations in afferent input may alter ontogenetic trajectories and compromise developmental outcome by reducing availability of conditions necessary for adequate postpartum adaptation.

Adaptation, Psychological↗
PubMedDate not supplied

Promoting awareness: the mother and her baby.

This study considered the problem of how to increase a mother's awareness of her infant's behavior and her own behavior as a beginning step toward the promotion of quality interaction between mother and infant. The impact of informing 108 mothers of term infants and 32 mothers of preterm infants about: (a) neonatal interactive, motoric, state control, and response to stress behavior patterns; and (b) maternal behaviors to enhance and support infant behavior was tested with four groups. In describing the behavior that occurred during a feeding session, mothers in two treatment groups reported significantly more of their own behavior than that of their neonate. They more closely resembled the trained observers' report of the behavior than did mothers in two control groups. Recommendations include incorporating an educative treatment in plans of nursing care for mothers and infants and further research to determine the optimal timing and long-term effects of such an intervention.

Adolescent↗
PubMed1979

Infant vision testing by a behavioral method.

A behavioral method of screening binocular infant vision called forced choice preferential looking (FPL) has been developed. Clinical trials of the FPL test for young infants are reported here. The test aids nonspecialized personnel in early identification of bilateral ocular abnormalities and anomalies of binocular cooperation (strabismus). It is not possible to screen for monocular eye disease or amblyopia with this test. Modifications of the FPL test may offer new ways of assessing other aspects of visual function early in life.

Age Factors↗
PubMed2003

Maternal panic disorder: infant temperament, neurophysiology, and parenting behaviors.

OBJECTIVE: To determine whether 4- and 14-month-old infants of mothers with panic disorder (PD) would be more likely to show differences in temperament, neurophysiology (salivary cortisol and sleep), and relationships with their mothers than controls. METHOD: Two cohorts were recruited: 4-month-old infants with PD mothers (n = 25) and 4-month-old controls (n = 24), and 14-month-old infants with PD mothers (n = 27) and 14-month-old controls (n = 18). Mothers completed diagnostic interviews and questionnaires concerning infant temperament, sleep, and parenting. Infant salivary cortisol samples and standard observational procedures to measure infant temperament, sleep, attachment, and parenting were also used. RESULTS: Infants with PD mothers did not show more high reactivity, behavioral inhibition, or ambivalent/resistant attachment but did demonstrate different neurophysiology (higher salivary cortisol and more disturbed sleep) than controls. PD mothers also displayed less sensitivity toward their infants and reported parenting behaviors concerning infant sleep and discipline that have been associated with child problems. CONCLUSIONS: While infants with PD mothers did not show early behavioral differences from controls, they did display neurophysiological divergences consistent with higher arousal/arousability. Such neurophysiological divergences (elevated salivary cortisol and disturbed sleep) might be important early indicators of risk. Helping PD mothers parent their more highly aroused/arousable infants could reduce the development of psychopathology.

Adult↗