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Gellrich J, Schriever VA, Rüdiger M, Burkhardt W. Olfactory stimulation in newborns: Regional differences in cerebral oxygenation. Brain Res 2024; 1845:149224. [PMID: 39243952 DOI: 10.1016/j.brainres.2024.149224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 08/04/2024] [Accepted: 09/03/2024] [Indexed: 09/09/2024]
Abstract
BACKGROUND The sense of smell is fully developed in newborns and plays an important role in their early development. There are several approaches to studying olfactory processing in the newborn brain, including EEG, fMRI, and near-infrared spectroscopy (NIRS). Understanding the processing of olfactory stimuli in the newborn brain is of fundamental importance for the development of supportive therapeutic odorant delivery, e.g. for weaning by gavage, and for adapting it to the developing brain. This study aimed to investigate the effect of different odors (milk, farnesol odor, and water as a control) on changes in brain activation in newborns in two different brain regions. METHODS Newborns older than 72 h and below an age of seven days were divided into two groups with different optode positioning strategies of NIRS, group I parietal and group II frontal. Olfactory stimulation was administered using milk, farnesol (floral odor), and water as a control. RESULTS A total of 26 newborns participated in the study. In the final analysis, 19 children were included. Allthough the optode positioning does not differ significantly, in group I, farnesol stimulation resulted in a significant increase in oxygenated hemoglobin compared to the control, while milk odor showed a decreased amplitude, particularly in the more parietal optode position. In group II, a significant difference was observed between the milk odor and the control, in the frontal areas. CONCLUSIONS This study revealed significant changes in hemoglobin oxygenation, indicating neuronal activation following different olfactory stimulation in both optode positionings. Whereas milk had more impact in frontal areas, the floral odor caused an effect in parietal areas.
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Affiliation(s)
- Janine Gellrich
- Abteilung Neuropädiatrie, Department of Pediatrics, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany; Department of Pediatrics, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.
| | - Valentin A Schriever
- Charité - Universitätsmedizin Berlin, Center for Chronically Sick Children (Sozialpädiatrisches Zentrum, SPZ), Berlin, Germany; Charité - Universitätsmedizin Berlin, Department of Pediatric Neurology, Berlin, Germany
| | - Mario Rüdiger
- Abteilung für Neonatologie und Intensivmedizin, Department of Pediatrics, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Wolfram Burkhardt
- Abteilung für Neonatologie und Intensivmedizin, Department of Pediatrics, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
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Schäfer L, Croy I. An integrative review: Human chemosensory communication in the parent-child relationship. Neurosci Biobehav Rev 2023; 153:105336. [PMID: 37527693 DOI: 10.1016/j.neubiorev.2023.105336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/21/2023] [Accepted: 07/28/2023] [Indexed: 08/03/2023]
Abstract
Body odors serve as signals of kinship, with parents exhibiting a preference for the scent of their infants, and vice versa. The reciprocal perception of body odors can promote bonding through two mechanisms. Firstly, as an indirect pathway, through associative chemosensory learning, which leads to changes in proximity-seeking behaviors. Secondly, as a direct pathway, by eliciting the display of positive emotions, thereby reinforcing the mutual bond. Both mechanisms weaken as the child undergoes development due to changes in body odor expression and perception. This comprehensive review provides an overview of the current literature on chemosignals in the parent-child relationship, highlighting their significance in facilitating dyadic communication throughout the developmental span. Furthermore, future research perspectives are outlined to gain a better understanding of these benefits and, on the long run, derive potential interventions to strengthen parent child attachment.
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Affiliation(s)
- Laura Schäfer
- Department of Psychotherapy and Psychosomatic Medicine, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.
| | - Ilona Croy
- Department of Clinical Psychology, Institute of Psychology, Friedrich-Schiller-Universität Jena, Germany; German Center for Mental Health (DZPG), Site Jena-Magdeburg-Halle, Germany
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Nunes CRDN, Freitas NFD, Arruda JRP, Bartholomeu MDD, Valadares GC, Rodrigues TM, Azevedo VMGDO, Bouzada MCF. Association between early onset of skin-to-skin contact and mother-infant interaction at hospital discharge and six months of corrected age among preterm infants. Early Hum Dev 2022; 165:105525. [PMID: 34996020 DOI: 10.1016/j.earlhumdev.2021.105525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 12/10/2021] [Accepted: 12/14/2021] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To compare mother-infant interaction between hospital discharge and at six months of corrected age of infants born ≤32 weeks and investigate the association between the onset of skin-to-skin contact and the difference in mother-infant interaction between discharge and six months of corrected age (CA) among preterm infants. MATERIAL AND METHODS Prospective observational study, in which 72 mother-infant dyads were evaluated. Preterm newborns (born with gestational age ≤ 32 weeks of gestational age) from two public maternity hospitals were assessed by means of video macro analysis of the mother-infant interaction according to the parameters adopted by the Mother-Baby Observation Protocol 0-6 (POIMB), at hospital discharge and at six months of corrected gestational age. Such variables as socioeconomic conditions, depression and maternal anxiety were controlled. Multivariate model was built. RESULTS Onset skin-to-skin contact within three days of life increased by 1.30 points for the best interactive infant behavior at discharge for the six months of CA. In addition, in relation to the tuning of the mother-infant dyad, the initiation of skin-to-skin contact at 20 days of life reduced 1.0 point significantly. Multiparous mothers or those exposed to cigarette smoke performed worse in the development of the dyad. CONCLUSION The preterm newborn should initiate skin-to-skin contact early and, whenever possible, by the third day of life to favor mother-infant interaction.
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Affiliation(s)
| | - Nathalia Faria de Freitas
- Universidade Federal de Minas Gerais, 190 Professor Alfredo Balena Ave. Santa Efigênia, Belo Horizonte, MG, 30130-100, Brazil
| | | | | | - Gislene Cristina Valadares
- Universidade Federal de Minas Gerais, 190 Professor Alfredo Balena Ave. Santa Efigênia, Belo Horizonte, MG, 30130-100, Brazil
| | - Thalyta Magalhães Rodrigues
- Universidade Federal de Minas Gerais, 190 Professor Alfredo Balena Ave. Santa Efigênia, Belo Horizonte, MG, 30130-100, Brazil
| | | | - Maria Cândida Ferrarez Bouzada
- Universidade Federal de Minas Gerais, 190 Professor Alfredo Balena Ave. Santa Efigênia, Belo Horizonte, MG, 30130-100, Brazil
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Tristão RM, Lauand L, Costa KSF, Brant LA, Fernandes GM, Costa KN, Spilski J, Lachmann T. Olfactory sensory and perceptual evaluation in newborn infants: A systematic review. Dev Psychobiol 2021; 63:e22201. [PMID: 34674234 DOI: 10.1002/dev.22201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 09/14/2021] [Accepted: 09/15/2021] [Indexed: 01/05/2023]
Abstract
Fetuses are able to process olfactory stimuli present in the womb and continue to show a preference for these odors for months after birth. Despite the accumulated knowledge about their early ability to perceive odors, there is a lack of validated scales for odor response in newborns. The evaluation of reactions of the olfactory system to environmental stimuli in infants has been defined by methodological theoretical approaches of experimental and clinical assessment tools. These approaches are mainly based on psychophysical approaches and predominantly use behavioral and physiological measures. Examples can be found in studies describing early abilities of newborn babies for behaviors or heart rate variability showing memory of maternal food preferences or mother's breast milk. This systematic review aimed to determine whether validated odor assessment tools can be feasibly used in studies. Particularly in light of the current COVID-19 pandemic and evidence of associated olfactory impairment resulting from SARS-COV-2 infection, the study is also motivated by the need for tools to assess olfactory function in neonates.
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Affiliation(s)
- Rosana Maria Tristão
- Faculty of Medicine, Area of Medicine of Child and Adolescent, University of Brasilia, Brasilia, Brazil
| | - Lucas Lauand
- Faculty of Medicine, Area of Medicine of Child and Adolescent, University of Brasilia, Brasilia, Brazil
| | | | - Luiz Alberto Brant
- Faculty of Medicine, Area of Medicine of Child and Adolescent, University of Brasilia, Brasilia, Brazil
| | - Geraldo Magela Fernandes
- Faculty of Medicine, Area of Medicine of Child and Adolescent, University of Brasilia, Brasilia, Brazil
| | - Karina Nascimento Costa
- Faculty of Medicine, Area of Medicine of Child and Adolescent, University of Brasilia, Brasilia, Brazil
| | - Jan Spilski
- Center for Cognitive Science, University of Kaiserslautern, Kaiserslautern, Germany
| | - Thomas Lachmann
- Center for Cognitive Science, University of Kaiserslautern, Kaiserslautern, Germany.,Centro de Ciencia Cognitiva, Facultad de Lenguas y Educación, Universidad Nebrija, Madrid, Spain
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Schaal B, Saxton TK, Loos H, Soussignan R, Durand K. Olfaction scaffolds the developing human from neonate to adolescent and beyond. Philos Trans R Soc Lond B Biol Sci 2020; 375:20190261. [PMID: 32306879 PMCID: PMC7209940 DOI: 10.1098/rstb.2019.0261] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/16/2020] [Indexed: 12/24/2022] Open
Abstract
The impact of the olfactory sense is regularly apparent across development. The fetus is bathed in amniotic fluid (AF) that conveys the mother's chemical ecology. Transnatal olfactory continuity between the odours of AF and milk assists in the transition to nursing. At the same time, odours emanating from the mammary areas provoke appetitive responses in newborns. Odours experienced from the mother's diet during breastfeeding, and from practices such as pre-mastication, may assist in the dietary transition at weaning. In parallel, infants are attracted to and recognize their mother's odours; later, children are able to recognize other kin and peers based on their odours. Familiar odours, such as those of the mother, regulate the child's emotions, and scaffold perception and learning through non-olfactory senses. During juvenility and adolescence, individuals become more sensitive to some bodily odours, while the timing of adolescence itself has been speculated to draw from the chemical ecology of the family unit. Odours learnt early in life and within the family niche continue to influence preferences as mate choice becomes relevant. Olfaction thus appears significant in turning on, sustaining and, in cases when mother odour is altered, disturbing adaptive reciprocity between offspring and carer during the multiple transitions of development between birth and adolescence. This article is part of the Theo Murphy meeting issue 'Olfactory communication in humans'.
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Affiliation(s)
- Benoist Schaal
- Developmental Ethology and Cognitive Psychology Laboratory, Centre des Sciences du Goût, UMR 6265 CNRS-Université de Bourgogne Franche-Comté, Inra-AgroSup, Dijon, France
| | - Tamsin K. Saxton
- Department of Psychology, Northumbria University, Newcastle upon Tyne, UK
| | - Hélène Loos
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
- Department of Sensory Analytics, Fraunhofer Institute for Process Engineering and Packaging IVV, Freising, Germany
| | - Robert Soussignan
- Developmental Ethology and Cognitive Psychology Laboratory, Centre des Sciences du Goût, UMR 6265 CNRS-Université de Bourgogne Franche-Comté, Inra-AgroSup, Dijon, France
| | - Karine Durand
- Developmental Ethology and Cognitive Psychology Laboratory, Centre des Sciences du Goût, UMR 6265 CNRS-Université de Bourgogne Franche-Comté, Inra-AgroSup, Dijon, France
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Karadeniz E, Kocak MN, Ahiskalioglu A, Nalci KA, Ozmen S, Akcay MN, Aydin N, Aydin MD, Hacimuftuoglu A. Exploring of the Unpredicted Effects of Olfactory Network Injuries on Mammary Gland Degeneration: A Preliminary Experimental Study. J INVEST SURG 2018. [DOI: 10.1080/08941939.2018.1446107] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Erdem Karadeniz
- Department of General Surgery, Medical Faculty, Ataturk University, Erzurum, Turkey
| | - Mehmet Nuri Kocak
- Department of Neurology, Medical Faculty, Ataturk University, Erzurum, Turkey
| | - Ali Ahiskalioglu
- Department of Anesthesiology and Reanimation, Medical Faculty, Ataturk University, Erzurum, Turkey
| | - Kemal Alp Nalci
- Department of Pharmacology, Medical Faculty, Ataturk University, Erzurum, Turkey
| | - Sevilay Ozmen
- Department of Pathology, Medical Faculty, Ataturk University, Erzurum, Turkey
| | - Mufide Nuran Akcay
- Department of General Surgery, Medical Faculty, Ataturk University, Erzurum, Turkey
| | - Nazan Aydin
- Psychiatry Clinic, Bakirkoy Teaching and Research Hospital, Istanbul, Turkey
| | - Mehmet Dumlu Aydin
- Department of Neurosurgery, Medical Faculty, Ataturk University, Erzurum, Turkey
| | - Ahmet Hacimuftuoglu
- Department of Pharmacology, Medical Faculty, Ataturk University, Erzurum, Turkey
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Császár-Nagy N, Bókkon I. Mother-newborn separation at birth in hospitals: A possible risk for neurodevelopmental disorders? Neurosci Biobehav Rev 2018; 84:337-351. [DOI: 10.1016/j.neubiorev.2017.08.013] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 06/23/2017] [Accepted: 08/20/2017] [Indexed: 12/11/2022]
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Gutiérrez-García AG, Contreras CM, Díaz-Marte C. Myristic acid in amniotic fluid produces appetitive responses in human newborns. Early Hum Dev 2017; 115:32-37. [PMID: 28886572 DOI: 10.1016/j.earlhumdev.2017.08.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 08/18/2017] [Accepted: 08/25/2017] [Indexed: 12/15/2022]
Abstract
BACKGROUND A mixture of eight fatty acids (lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, elaidic acid, and linoleic acid) that are contained in human amniotic fluid, colostrum, and milk produces appetitive responses in newborns, suggesting the existence of a transition of sensorial cues that guide newborns to the maternal breast. OBJECTIVE To explore the ability of each of these eight fatty acids individually to produce appetitive responses in newborns. METHODS The study included 12 healthy human newborns<24h after birth. Using a longitudinal design, cotton swabs that were impregnated with each of the eight fatty acids and control substances (i.e., vehicle, saline, and vanilla) were placed approximately 1cm from the newborns' nostrils for 30s. Positive responses that were suggestive of acceptance included appetitive movements (i.e., suckling) and sniffing that were directed toward the cotton swab. Lateral movements of the head away from the swab were considered negative responses. Remaining stationary with no changes in facial expressions was considered indifference. RESULTS Compared with controls (i.e., vehicle, saline, and vanilla) and the other fatty acids tested, myristic acid produced the longest duration of positive facial responses (suckling and sniffing). No significant differences in negative facial responses were observed in response to the odoriferous stimuli. No reactions that were suggestive of disgust were observed. CONCLUSION A complex combination of stimuli, including the odor of myristic acid, may integrate sensory cues that guide newborns to the maternal breast.
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Affiliation(s)
- Ana G Gutiérrez-García
- Facultad de Psicología, Universidad Veracruzana, Xalapa 91097, Veracruz, Mexico; Laboratorio de Neurofarmacología, Instituto de Neuroetología, Universidad Veracruzana, Xalapa 91190, Veracruz, Mexico.
| | - Carlos M Contreras
- Laboratorio de Neurofarmacología, Instituto de Neuroetología, Universidad Veracruzana, Xalapa 91190, Veracruz, Mexico; Unidad Periférica Xalapa, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Xalapa 91190, Veracruz, Mexico
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Martinec Nováková L, Plotěná D, Havlíček J. Age and Pubertal Status-Related Changes in Reports of Perception of Personal Odors. Perception 2017; 46:484-497. [PMID: 28056656 DOI: 10.1177/0301006616686096] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
As previously suggested, preferences for kin body odor might undergo an adaptive change over the course of puberty in order to avoid potential inbreeding, resulting in aversion to body odor of the opposite-gender kin as individuals mature sexually. However, studies based on mutual body odor aversion are rather inconclusive. We therefore investigated whether children's reports of individuals smelling good or bad differed as a function of age and pubertal status. We asked 219 children (94 male) aged 10 to 15 years to assess their pubertal development using a standardized measure and to name individuals they thought smelled good or bad. Results of the present study show that the older the girls were, the more likely they were to name males than females among nice-smelling people. Further, in both girls and boys alike, children with higher puberty scores were more likely to name children than adults. Neither in girls nor in boys did we observe any concurrent effect of age or pubertal status on children's reports of persons thought to smell bad. Irrespective of whether these changes are driven by age itself or age-related phenomena, these results suggest a shift toward a more general positive attitude to peers rather than active kin avoidance.
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Affiliation(s)
- Lenka Martinec Nováková
- Faculty of Humanities, Charles University, Prague, Czech Republic; Faculty of Science, Charles University, Prague, Czech Republic; National Institute of Mental Health, Klecany, Czech Republic
| | - Dagmar Plotěná
- Faculty of Humanities, Charles University, Prague, Czech Republic
| | - Jan Havlíček
- Faculty of Science, Charles University, Prague, Czech Republic; National Institute of Mental Health, Klecany, Czech Republic
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