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Original Article

An Update on Social Touch

How Does Humans’ Social Nature Emerge at the Periphery of the Body?

Published Online:https://doi.org/10.1027/1192-5604/a000153

Abstract. Recent research suggests that early physical touch provided by caregivers play a critical role in cognitive and affective development. The discovery of the C-tactile fibers – which selectively respond to low-speed physical stimulations, such as maternal affectionate touch and caresses – opened a promising field of research into the physiological bases of human togetherness. Notably, C-tactile fiber stimulation is primarily elaborated in a specific brain area (i.e., the insula), which is involved in affective and socio-cognitive skills as well as in the development of an individual’s body image. In the present study, we provide a narrative overview of the research conducted so far on the role of maternal affectionate touch in infants’ cognitive and emotional development, and we highlight potential implications for clinical practice with children and adults.

References

  • Abu-Zhaya, R., Seidl, A., & Cristia, A. (2016). Multimodal infant-directed communication: How caregivers combine tactile and linguistic cues. Journal of Child Language, 44(5), 1088–1116. https://doi.org/10.1017/S0305000916000416 First citation in articleCrossrefGoogle Scholar

  • Anzieu, D. (1989). The skin ego. Yale University Press. First citation in articleGoogle Scholar

  • Bagot, R. C., Zhang, T.-Y., Wen, X., Nguyen, T. T. T., Nguyen, H.-B., Diorio, J., Wong, T. P., & Meaney, M. J. (2012). Variations in postnatal maternal care and the epigenetic regulation of metabotropic glutamate receptor 1 expression and hippocampal function in the rat. Proceedings of the National Academy of Sciences of the United States of America, 109(Suppl 2), 17200–17207. https://doi.org/10.1073/pnas.1204599109 First citation in articleCrossrefGoogle Scholar

  • Banerjee, D., Vasquez, V., Pecchio, M., Hegde, M. L., Ks Jagannatha, R., & Rao, T. S. (2021). Biopsychosocial intersections of social/affective touch and psychiatry: Implications of “touch hunger” during COVID-19. The International Journal of Social Psychiatry, 20764021997485. https://doi.org/10.1177/0020764021997485 First citation in articleGoogle Scholar

  • Barello, S., Palamenghi, L., & Graffigna, G. (2020). Burnout and somatic symptoms among frontline healthcare professionals at the peak of the Italian COVID-19 pandemic. Psychiatry Research, 290. https://doi.org/10.1016/j.psychres.2020.113129 First citation in articleCrossrefGoogle Scholar

  • Berne, E. (1972). What do you say after you say hello? The psychology of human destiny. Grove Press. First citation in articleGoogle Scholar

  • Berretta, E., Guida, E., Forni, D., & Provenzi, L. (2021). Glucocorticoid receptor gene (NR3C1) methylation during the first thousand days: Environmental exposures and developmental outcomes. Neuroscience and Biobehavioural Reviews, 125, 493–502. https://doi.org/10.1016/j.neubiorev.2021.03.003 First citation in articleCrossrefGoogle Scholar

  • Bjertrup, A. J., Friis, N. K., & Miskowiak, K. W. (2019). The maternal brain: Neural responses to infants in mothers with and without mood disorder. Neuroscience and Biobehavioural Reviews, 107, 196–207. First citation in articleCrossrefGoogle Scholar

  • Björnsdotter, M., Löken, L., Olausson, H., Vallbo, Å., & Wessberg, J. (2009). Somatotopic organization of gentle touch processing in the posterior insular cortex. Journal of Neuroscience, 29(29), 9314–9320. https://doi.org/10.1523/JNEUROSCI.0400-09.2009 First citation in articleCrossrefGoogle Scholar

  • Breuer, J., & Freud, S. (1957). Studies on hysteria. Basic Books. First citation in articleGoogle Scholar

  • Bulf, H., Brenna, V., Valenza, E., Johnson, S. P., & Turati, C. (2015). Many faces, one rule: The role of perceptual expertise in infants’ sequential rule learning. Frontiers in Psychology, 6. https://doi.org/10.3389/fpsyg.2015.01595 First citation in articleCrossrefGoogle Scholar

  • Campbell-Yeo, M., Johnston, C. C., Benoit, B., Disher, T., Caddell, K., Vincer, M., Walker, C.-D., Latimer, M., Streiner, D. L., & Inglis, D. (2019). Sustained efficacy of kangaroo care for repeated painful procedures over neonatal intensive care unit hospitalization: A single-blind randomized controlled trial. Pain, 160(11), 2580–2588. https://doi.org/10.1097/j.pain.0000000000001646 First citation in articleCrossrefGoogle Scholar

  • Cascio, C. J., Moore, D., & McGlone, F. (2019). Social touch and human development. Developmental Cognitive Neuroscience, 35, 5–11. https://doi.org/10.1016/j.dcn.2018.04.009 First citation in articleCrossrefGoogle Scholar

  • Cassella, M. J., & Viglione, D. J. (2009). The Rorschach texture response: A construct validation study using attachment theory. Journal of Personality Assessment, 91(6), 601–610. https://doi.org/10.1080/00223890903230931 First citation in articleCrossrefGoogle Scholar

  • Courtiol, E., Wilson, D. A., Shah, R., Sullivan, R. M., & Teixeira, C. M. (2018). Maternal regulation of pups’ cortical activity: Role of serotonergic signaling. ENeuro, 5(4). https://doi.org/10.1523/ENEURO.0093-18.2018 First citation in articleCrossrefGoogle Scholar

  • Croy, I., Sehlstedt, I., Wasling, H. B., Ackerley, R., & Olausson, H. (2019). Gentle touch perception: From early childhood to adolescence. Developmental Cognitive Neuroscience, 35, 81–86. https://doi.org/10.1016/j.dcn.2017.07.009 First citation in articleCrossrefGoogle Scholar

  • de Lima, C. V. C., Cândido, E. L., da Silva, J. A., Albuquerque, L. V., de Soares, L. M., do Nascimento, M. M., de Oliveira, S. A., & Neto, M. L. R. (2020). Effects of quarantine on mental health of populations affected by Covid-19. Journal of Affective Disorders, 275, 253–254. https://doi.org/10.1016/j.jad.2020.06.063 First citation in articleCrossrefGoogle Scholar

  • Debrot, A., Schoebi, D., Perrez, M., & Horn, A. B. (2013). Touch as an interpersonal emotion regulation process in couples’ daily lives: The mediating role of psychological intimacy. Personality & Social Psychology Bulletin, 39(10), 1373–1385. https://doi.org/10.1177/0146167213497592 First citation in articleCrossrefGoogle Scholar

  • Debrot, A., Stellar, J. E., MacDonald, G., Keltner, D., & Impett, E. A. (2021). Is touch in romantic relationships universally beneficial for psychological well-being? The role of attachment avoidance. Personality & Social Psychology Bulletin, 47(10), 1495–1509. https://doi.org/10.1177/0146167220977709 First citation in articleCrossrefGoogle Scholar

  • Della Longa, L., Gliga, T., & Farroni, T. (2019). Tune to touch: Affective touch enhances learning of face identity in 4-month-old infants. Developmental Cognitive Neuroscience, 35, 42–46. https://doi.org/10.1016/j.dcn.2017.11.002 First citation in articleCrossrefGoogle Scholar

  • Durkin, J., Jackson, D., & Usher, K. (2021). Touch in times of COVID-19: Touch hunger hurts. Journal of Clinical Nursing, 30(1–2), e4–e5. https://doi.org/10.1111/jocn.15488 First citation in articleCrossrefGoogle Scholar

  • Essick, G. K., McGlone, F., Dancer, C., Fabricant, D., Ragin, Y., Phillips, N., Jones, T., & Guest, S. (2010). Quantitative assessment of pleasant touch. Neuroscience and Biobehavioural Reviews, 34(2), 192–203. https://doi.org/10.1016/j.neubiorev.2009.02.003 First citation in articleCrossrefGoogle Scholar

  • Falck-Ytter, T., Gredebäck, G., & Von Hofsten, C. (2006). Infants predict other people’s action goals. Nature Neuroscience, 9(7), 878–879. https://doi.org/10.1038/nn1729 First citation in articleCrossrefGoogle Scholar

  • Fausey, C. M., Jayaraman, S., & Smith, L. B. (2016). From faces to hands: Changing visual input in the first two years. Cognition, 152, 101–107. https://doi.org/10.1016/j.cognition.2016.03.005 First citation in articleCrossrefGoogle Scholar

  • Filippetti, M. L., Johnson, M. H., Lloyd-Fox, S., Dragovic, D., & Farroni, T. (2013). Body perception in newborns. Current Biology, 23(23), 2413–2416. https://doi.org/10.1016/j.cub.2013.10.017 First citation in articleCrossrefGoogle Scholar

  • Filippetti, M. L., Orioli, G., Johnson, M. H., & Farroni, T. (2015). Newborn body perception: Sensitivity to spatial congruency. Infancy, 20(4), 455–465. https://doi.org/10.1111/infa.12083 First citation in articleCrossrefGoogle Scholar

  • Fosshage, J. L. (2000). The meanings of touch in psychoanalysis: A time for reassessment. Psychoanalytic Inquiry, 20(1), 21–43. https://doi.org/10.1080/07351692009348873 First citation in articleCrossrefGoogle Scholar

  • Freud, S. (1961). The ego and the id. Norton. First citation in articleCrossrefGoogle Scholar

  • Giannopoulou, I., Galinaki, S., Kollintza, E., Adamaki, M., Kympouropoulos, S., Alevyzakis, E., Tsamakis, K., Tsangaris, I., Spandidos, D. A., Siafakas, N., Zoumpourlis, V., & Rizos, E. (2021). COVID-19 and post-traumatic stress disorder: The perfect “storm” for mental health. Experimental and Therapeutic Medicine, 22(4), Article 1162. https://doi.org/10.3892/etm.2021.10596 First citation in articleCrossrefGoogle Scholar

  • Golaya, S. (2021). Touch-hunger: An unexplored consequence of the COVID-19 pandemic. Indian Journal of Psychological Medicine, 43(4), 362–363. https://doi.org/10.1177/02537176211014469 First citation in articleCrossrefGoogle Scholar

  • Grumi, S., Cappagli, G., Aprile, G., Mascherpa, E., Gori, M., Provenzi, L., & Signorini, S. (2021). Togetherness, beyond the eyes: A systematic review on the interaction between visually impaired children and their parents. Infant Behaviour and Development, 64, Article 101590. https://doi.org/10.1016/j.infbeh.2021.101590 First citation in articleCrossrefGoogle Scholar

  • Grundt, H., Tandberg, B. S., Flacking, R., Drageset, J., & Moen, A. (2021). Associations between single-family room care and breastfeeding rates in preterm infants. Journal of Human Lactation: Official Journal of International Lactation Consultant Association, 37(3), 593–602. https://doi.org/10.1177/0890334420962709 First citation in articleCrossrefGoogle Scholar

  • He, F. B., Axelin, A., Ahlqvist-Björkroth, S., Raiskila, S., Löyttyniemi, E., & Lehtonen, L. (2021). Effectiveness of the close collaboration with parents intervention on parent-infant closeness in NICU. BMC Pediatrics, 21(1), Article 28. https://doi.org/10.1186/s12887-020-02474-2 First citation in articleCrossrefGoogle Scholar

  • Head, L. M. (2014). The effect of kangaroo care on neurodevelopmental outcomes in preterm infants. The Journal of Perinatal & Neonatal Nursing, 28(4), 290–299. https://doi.org/10.1097/JPN.0000000000000062 First citation in articleCrossrefGoogle Scholar

  • Iwasa, K., & Ogawa, T. (2013). Rorschach texture responses are related to adult attachment via tactile imagery and emotion. Rorschachiana, 34(2), 115–136. https://doi.org/10.1027/1192-5604/a000045 First citation in articleLinkGoogle Scholar

  • Jack, R. E., & Schyns, P. G. (2015). The human face as a dynamic tool for social communication. Current Biology, 25(14), R621–R634. https://doi.org/10.1016/j.cub.2015.05.052 First citation in articleCrossrefGoogle Scholar

  • Jakubiak, B. K., & Feeney, B. C. (2017). Affectionate touch to promote relational, psychological, and physical well-being in adulthood: A theoretical model and review of the research. Personality and Social Psychology Review, 21(3), 228–252. https://doi.org/10.1177/1088868316650307 First citation in articleCrossrefGoogle Scholar

  • Jean, A. D. L., & Stack, D. M. (2012). Full-term and very-low-birth-weight preterm infants’ self-regulating behaviours during a still-face interaction: Influences of maternal touch. Infant Behaviour and Development, 35(4), 779–791. https://doi.org/10.1016/j.infbeh.2012.07.023 First citation in articleCrossrefGoogle Scholar

  • Jean, A. D. L., Stack, D. M., & Fogel, A. (2009). A longitudinal investigation of maternal touching across the first 6 months of life: Age and context effects. Infant Behaviour and Development, 32(3), 344–349. https://doi.org/10.1016/j.infbeh.2009.04.005 First citation in articleCrossrefGoogle Scholar

  • Kirsch, L. P., Besharati, S., Papadaki, C., Crucianelli, L., Bertagnoli, S., Ward, N., Moro, V., Jenkinson, P. M., & Fotopoulou, A. (2020). Damage to the right insula disrupts the perception of affective touch. eLife, 9. https://doi.org/10.7554/eLife.47895 First citation in articleCrossrefGoogle Scholar

  • Kraus, J., Roman, R., Jurkovičová, L., Mareček, R., Mikl, M., Brázdil, M., & Frick, A. (2020). Social support modulates subjective and neural responses to sad mental imagery. Behavioural Brain Research, 380, Article 112433. https://doi.org/10.1016/j.bbr.2019.112433 First citation in articleCrossrefGoogle Scholar

  • Kreuder, A.-K., Scheele, D., Wassermann, L., Wollseifer, M., Stoffel-Wagner, B., Lee, M. R., Hennig, J., Maier, W., & Hurlemann, R. (2017). How the brain codes intimacy: The neurobiological substrates of romantic touch. Human Brain Mapping, 38(9), 4525–4534. https://doi.org/10.1002/hbm.23679 First citation in articleCrossrefGoogle Scholar

  • Leonard, J. A., Berkowitz, T., & Shusterman, A. (2014). The effect of friendly touch on delay-of-gratification in preschool children. The Quarterly Journal of Experimental Psychology, 67(11), 2123–2133. https://doi.org/10.1080/17470218.2014.907325 First citation in articleCrossrefGoogle Scholar

  • Liu, D., Diorio, J., Tannenbaum, B., Caldji, C., Francis, D., Freedman, A., Sharma, S., Pearson, D., Plotsky, P. M., & Meaney, M. J. (1997). Maternal care, hippocampal glucocorticoid receptors, and hypothalamic-pituitary-adrenal responses to stress. Science, 277(5332), 1659–1662. https://doi.org/10.1126/science.277.5332.1659 First citation in articleCrossrefGoogle Scholar

  • Löken, L. S., Wessberg, J., Morrison, I., McGlone, F., & Olausson, H. (2009). Coding of pleasant touch by unmyelinated afferents in humans. Nature Neuroscience, 12(5), 547–548. https://doi.org/10.1038/nn.2312 First citation in articleCrossrefGoogle Scholar

  • Longhi, E., Senna, I., Bolognini, N., Bulf, H., Tagliabue, P., Cassia, V. M., & Turati, C. (2015). Discrimination of biomechanically possible and impossible hand movements at birth. Child Development, 86(2), 632–641. https://doi.org/10.1111/cdev.12329 First citation in articleCrossrefGoogle Scholar

  • Mantis, I., Stack, D. M., Ng, L., Serbin, L. A., & Schwartzman, A. E. (2014). Mutual touch during mother-infant face-to-face still-face interactions: Influences of interaction period and infant birth status. Infant Behaviour & Development, 37(3), 258–267. https://doi.org/10.1016/j.infbeh.2014.04.005 First citation in articleCrossrefGoogle Scholar

  • McGlone, F., Wessberg, J., & Olausson, H. (2014). Discriminative and affective touch: Sensing and feeling. Neuron, 82(4), 737–755. https://doi.org/10.1016/j.neuron.2014.05.001 First citation in articleCrossrefGoogle Scholar

  • Meaney, M. J., & Szyf, M. (2005). Environmental programming of stress responses through DNA methylation: Life at the interface between a dynamic environment and a fixed genome. Dialogues in Clinical Neuroscience, 7(2), 103–123. First citation in articleCrossrefGoogle Scholar

  • Mercuri, M., Stack, D. M., Trojan, S., Giusti, L., Morandi, F., Mantis, I., & Montirosso, R. (2019). Mothers’ and fathers’ early tactile contact behaviours during triadic and dyadic parent-infant interactions immediately after birth and at 3-months postpartum: Implications for early care behaviours and intervention. Infant Behaviour and Development, 57, Article 101347. https://doi.org/10.1016/j.infbeh.2019.101347 First citation in articleCrossrefGoogle Scholar

  • Moenter, A. (2020). Being in touch: The potential benefits and the use of attuned touch in psychotherapy for functional neurological symptoms (FNS). European Journal of Trauma & Dissociation, 4(3), Article 100161. https://doi.org/10.1016/j.ejtd.2020.100161 First citation in articleCrossrefGoogle Scholar

  • Montirosso, R., & McGlone, F. (2020). The body comes first. Embodied reparation and the co-creation of infant bodily-self. Neuroscience and Biobehavioural Reviews, 113, 77–87. https://doi.org/10.1016/j.neubiorev.2020.03.003 First citation in articleCrossrefGoogle Scholar

  • Montirosso, R., & Provenzi, L. (2015). Implications of epigenetics and stress regulation on research and developmental care of preterm infants. Journal of Obstetric, Gynecologic, and Neonatal Nursing, 44(2), 174–182. https://doi.org/10.1111/1552-6909.12559 First citation in articleCrossrefGoogle Scholar

  • Mörelius, E., Örtenstrand, A., Theodorsson, E., & Frostell, A. (2015). A randomised trial of continuous skin-to-skin contact after preterm birth and the effects on salivary cortisol, parental stress, depression, and breastfeeding. Early Human Development, 91(1), 63–70. https://doi.org/10.1016/j.earlhumdev.2014.12.005 First citation in articleCrossrefGoogle Scholar

  • Moszkowski, R. J., Stack, D. M., & Chiarella, S. S. (2009). Infant touch with gaze and affective behaviours during mother–infant still-face interactions: Co-occurrence and functions of touch. Infant Behaviour & Development, 32(4), 392–403. https://doi.org/10.1016/j.infbeh.2009.06.006 First citation in articleCrossrefGoogle Scholar

  • Müller-Oerlinghausen, B., & Eggart, M. (2021). Touch research – quo vadis? A plea for high-quality clinical trials. Brain Sciences, 11(1), Article 25. https://doi.org/10.3390/brainsci11010025 First citation in articleCrossrefGoogle Scholar

  • Novembre, G., Etzi, R., & Morrison, I. (2021). Hedonic responses to touch are modulated by the perceived attractiveness of the caresser. Neuroscience, 464, 79–89. https://doi.org/10.1016/j.neuroscience.2020.10.007 First citation in articleCrossrefGoogle Scholar

  • Olausson, H., Wessberg, J., Morrison, I., McGlone, F., & Vallbo, A. (2010). The neurophysiology of unmyelinated tactile afferents. Neuroscience and Biobehavioural Reviews, 34(2), 185–191. https://doi.org/10.1016/j.neubiorev.2008.09.011 First citation in articleCrossrefGoogle Scholar

  • Porges, S. W. (2007). The polyvagal perspective. Biological Psychology, 74(2), 116–143. https://doi.org/10.1016/j.biopsycho.2006.06.009 First citation in articleCrossrefGoogle Scholar

  • Provenzi, L., Brambilla, M., Scotto di Minico, G., Montirosso, R., & Borgatti, R. (2020). Maternal caregiving and DNA methylation in human infants and children: Systematic review. Genes, Brain and Behaviour, 19(3), Article e12616. https://doi.org/10.1111/gbb.12616 First citation in articleCrossrefGoogle Scholar

  • Provenzi, L., Giorda, R., Beri, S., & Montirosso, R. (2016). SLC6A4 methylation as an epigenetic marker of life adversity exposures in humans: A systematic review of literature. Neuroscience and Biobehavioral Reviews, 71, 7–20. https://doi.org/10.1016/j.neubiorev.2016.08.021 First citation in articleCrossrefGoogle Scholar

  • Provenzi, L., Lindstedt, J., De Coen, K., Gasparini, L., Peruzzo, D., Grumi, S., Arrigoni, F., & Ahlqvist-Björkroth, S. (2021). The paternal brain in action: A review of human fathers’ fMRI brain responses to child-related stimuli. Brain Sciences, 11(6), Article 816. https://doi.org/10.3390/brainsci11060816 First citation in articleCrossrefGoogle Scholar

  • Provenzi, L., Rosa, E., Visintin, E., Mascheroni, E., Guida, E., Cavallini, A., & Montirosso, R. (2020). Understanding the role and function of maternal touch in children with neurodevelopmental disabilities. Infant Behaviour and Development, 58, Article 101420. https://doi.org/10.1016/j.infbeh.2020.101420 First citation in articleCrossrefGoogle Scholar

  • Rochat, P. (2021). Clinical pointers from developing self-awareness. Developmental Medicine and Child Neurology, 63(4), 382–386. https://doi.org/10.1111/dmcn.14767 First citation in articleCrossrefGoogle Scholar

  • Scher, M. S., Ludington-Hoe, S., Kaffashi, F., Johnson, M. W., Holditch-Davis, D., & Loparo, K. A. (2009). Neurophysiologic assessment of brain maturation after an 8-week trial of skin-to-skin contact on preterm infants. Clinical Neurophysiology, 120(10), 1812–1818. https://doi.org/10.1016/j.clinph.2009.08.004 First citation in articleCrossrefGoogle Scholar

  • Seidl, A., Tincoff, R., Baker, C., & Cristia, A. (2015). Why the body comes first: Effects of experimenter touch on infants’ word finding. Developmental Science, 18(1), 155–164. https://doi.org/10.1111/desc.12182 First citation in articleCrossrefGoogle Scholar

  • Sharp, H., Pickles, A., Meaney, M., Marshall, K., Tibu, F., & Hill, J. (2012). Frequency of infant stroking reported by mothers moderates the effect of prenatal depression on infant behavioural and physiological outcomes. PLoS One, 7(10), Article e45446. https://doi.org/10.1371/journal.pone.0045446 First citation in articleCrossrefGoogle Scholar

  • Simpson, E. A., Maylott, S. E., Lazo, R. J., Leonard, K. A., Kaburu, S. S. K., Suomi, S. J., Paukner, A., & Ferrari, P. F. (2019). Social touch alters newborn monkey behaviour. Infant Behaviour & Development, 57, Article 101368. https://doi.org/10.1016/j.infbeh.2019.101368 First citation in articleCrossrefGoogle Scholar

  • Slater, R., Boyd, S., Meek, J., & Fitzgerald, M. (2006). Cortical pain responses in the infant brain. Pain, 123(3), Article 332. https://doi.org/10.1016/j.pain.2006.05.009 First citation in articleCrossrefGoogle Scholar

  • Stenzel, C. L., & Rupert, P. A. (2004). Psychologists’ use of touch in individual psychotherapy. Psychotherapy, 41(3), 332–345. https://doi.org/10.1037/0033-3204.41.3.332 First citation in articleCrossrefGoogle Scholar

  • Stoll, B. J., Hansen, N. I., Bell, E. F., Shankaran, S., Laptook, A. R., Walsh, M. C., Hale, E. C., Newman, N. S., Schibler, K., Carlo, W. A., Kennedy, K. A., Poindexter, B. B., Finer, N. N., Ehrenkranz, R. A., Duara, S., Sánchez, P. J., O’Shea, T. M., Goldberg, R. N., Van Meurs, K. P., … Higgins, R. D. (2010). Neonatal outcomes of extremely preterm infants from the NICHD Neonatal Research Network. Pediatrics, 126(3), 443–456. https://doi.org/10.1542/peds.2009-2959 First citation in articleCrossrefGoogle Scholar

  • Suvilehto, J. T., Glerean, E., Dunbar, R. I. M., Hari, R., & Nummenmaa, L. (2015). Topography of social touching depends on emotional bonds between humans. Proceedings of the National Academy of Sciences of the United States of America, 112(45), 13811–13816. https://doi.org/10.1073/pnas.1519231112 First citation in articleCrossrefGoogle Scholar

  • Tanaka, Y., Kanakogi, Y., Kawasaki, M., & Myowa, M. (2018). The integration of audio-tactile information is modulated by multimodal social interaction with physical contact in infancy. Developmental Cognitive Neuroscience, 30, 31–40. https://doi.org/10.1016/j.dcn.2017.12.001 First citation in articleCrossrefGoogle Scholar

  • Tanaka, Y., Kanakogi, Y., & Myowa, M. (2021). Social touch in mother–infant interaction affects infants’ subsequent social engagement and object exploration. Humanities and Social Sciences Communications, 8(1). https://doi.org/10.1057/s41599-020-00642-4 First citation in articleCrossrefGoogle Scholar

  • Turati, C., Montirosso, R., Brenna, V., Ferrara, V., & Borgatti, R. (2011). A smile enhances 3‐month‐olds’ recognition of an individual face. Infancy, 16(3), 306–317. https://doi.org/10.1111/j.1532-7078.2010.00047.x First citation in articleCrossrefGoogle Scholar

  • Tuulari, J. J., Scheinin, N. M., Lehtola, S., Merisaari, H., Saunavaara, J., Parkkola, R., Sehlstedt, I., Karlsson, L., Karlsson, H., & Björnsdotter, M. (2019). Neural correlates of gentle skin stroking in early infancy. Developmental Cognitive Neuroscience, 35, 36–41. https://doi.org/10.1016/j.dcn.2017.10.004 First citation in articleCrossrefGoogle Scholar

  • Vindegaard, N., & Benros, M. E. (2020). COVID-19 pandemic and mental health consequences: Systematic review of the current evidence. Brain, Behaviour, and Immunity, 89, 531–542. https://doi.org/10.1016/j.bbi.2020.05.048 First citation in articleCrossrefGoogle Scholar

  • Walker, S. C., Trotter, P. D., Swaney, W. T., Marshall, A., & Mcglone, F. P. (2017). C-tactile afferents: Cutaneous mediators of oxytocin release during affiliative tactile interactions? Neuropeptides, 64, 27–38. https://doi.org/10.1016/j.npep.2017.01.001 First citation in articleCrossrefGoogle Scholar

  • Werbart, A. (2019). “The skin is the cradle of the soul”: Didier Anzieu on the skin-ego, boundaries, and boundlessness. Journal of the American Psychoanalytic Association, 67(1), 37–58. https://doi.org/10.1177/0003065119829701 First citation in articleCrossrefGoogle Scholar

  • Westland, G. (2011). Physical touch in psychotherapy: Why are we not touching more? Body Movement and Dance in Psychotherapy, 6(1), 17–29. https://doi.org/10.1080/17432979.2010.508597 First citation in articleCrossrefGoogle Scholar

  • Westrup, B. (2007). Newborn Individualized Developmental Care and Assessment Program (NIDCAP)–family-centered developmentally supportive care. Early Human Development, 83(7), 443–449. https://doi.org/10.1016/j.earlhumdev.2007.03.006 First citation in articleCrossrefGoogle Scholar