J Affect Disord. 2024 Mar 18:S0165-0327(24)00515-9. doi: 10.1016/j.jad.2024.03.092. Online ahead of print. ABSTRACT BACKGROUND: Touch is an essential form of mother-child interaction, instigating better social bonding and emotional stability. METHODS: We used diffuse optical tomography to explore the relationship between total haemoglobin (HbT) responses to affective touch in the child’s…